Added magnets

Belt gap position is now relative to the pitch line.
Added belt_pitch_to_back().

examples/MainsBreakOutBox/scad/bob_main.scad

@@ -52,7 +52,7 @@ iec = IEC_inlet_atx;
 socket = Contactum;
 
 
-foot = [20, 8, 3, 1, M3_dome_screw, 10];
+foot = Foot(d = 20, h = 8, t = 3, r = 1, screw = M3_dome_screw);
 
 module foot_stl() foot(foot);
 

global_defs.scad

@@ -52,14 +52,7 @@ $fs = extrusion_width / 2;
 
 function round_to_layer(z) = ceil(z / layer_height) * layer_height;
 // Some additional named colours
-grey20                          = [0.2, 0.2, 0.2];
-grey30                          = [0.3, 0.3, 0.3];
-grey40                          = [0.4, 0.4, 0.4];
-grey50                          = [0.5, 0.5, 0.5];
-grey60                          = [0.6, 0.6, 0.6];
-grey70                          = [0.7, 0.7, 0.7];
-grey80                          = [0.8, 0.8, 0.8];
-grey90                          = [0.9, 0.9, 0.9];
+function grey(n) = [0.01, 0.01, 0.01] * n;                                          //! Generate a shade of grey to pass to color().
 gold                            = [255/255, 215/255, 0/255];
 brass                           = [255/255, 220/255, 100/255];
 silver                          = [0.75, 0.75, 0.75];

lib.scad

@@ -29,6 +29,7 @@ include <vitamins/batteries.scad>
 include <vitamins/blowers.scad>
 include <vitamins/bulldogs.scad>
 include <vitamins/buttons.scad>
+include <vitamins/cameras.scad>
 include <vitamins/components.scad>
 include <vitamins/displays.scad>
 include <vitamins/extrusions.scad>
@@ -40,9 +41,12 @@ include <vitamins/inserts.scad>
 include <vitamins/kp_pillow_blocks.scad>
 include <vitamins/ldrs.scad>
 include <vitamins/leadnuts.scad>
+include <vitamins/led_meter.scad>
 include <vitamins/light_strips.scad>
+include <vitamins/magnets.scad>
 include <vitamins/mains_sockets.scad>
 include <vitamins/modules.scad>
+include <vitamins/panel_meters.scad>
 include <vitamins/pillars.scad>
 include <vitamins/pin_headers.scad>
 include <vitamins/pulleys.scad>
@@ -55,6 +59,7 @@ include <vitamins/sk_brackets.scad>
 include <vitamins/spools.scad>
 include <vitamins/ssrs.scad>
 include <vitamins/stepper_motors.scad>
+include <vitamins/swiss_clips.scad>
 include <vitamins/toggles.scad>
 include <vitamins/transformers.scad>
 include <vitamins/tubings.scad>
@@ -62,7 +67,6 @@ include <vitamins/variacs.scad>
 include <vitamins/zipties.scad>
 
 use <vitamins/jack.scad>
-use <vitamins/meter.scad>
 use <vitamins/fuseholder.scad>
 use <vitamins/hygrometer.scad>
 
@@ -81,6 +85,7 @@ use <utils/rounded_cylinder.scad>
 use <utils/dogbones.scad>
 use <utils/tube.scad>
 use <utils/quadrant.scad>
+use <utils/gears.scad>
 use <utils/hanging_hole.scad>
 use <utils/fillet.scad>
 use <utils/rounded_polygon.scad>

libtest.scad

@@ -29,6 +29,7 @@ use <tests/blowers.scad>
 use <tests/bulldogs.scad>
 use <tests/buttons.scad>
 use <tests/cable_strips.scad>
+use <tests/cameras.scad>
 use <tests/circlips.scad>
 use <tests/components.scad>
 use <tests/d_connectors.scad>
@@ -48,12 +49,14 @@ use <tests/LDRs.scad>
 use <tests/LEDs.scad>
 use <tests/light_strips.scad>
 use <tests/linear_bearings.scad>
-use <tests/meter.scad>
+use <tests/LED_meters.scad>
+use <tests/magnets.scad>
 use <tests/microswitches.scad>
 use <tests/modules.scad>
 use <tests/nuts.scad>
 use <tests/o_ring.scad>
 use <tests/opengrab.scad>
+use <tests/panel_meters.scad>
 use <tests/PCBs.scad>
 use <tests/pillars.scad>
 use <tests/PSUs.scad>
@@ -71,6 +74,7 @@ use <tests/spades.scad>
 use <tests/springs.scad>
 use <tests/SSRs.scad>
 use <tests/stepper_motors.scad>
+use <tests/Swiss_clips.scad>
 use <tests/toggles.scad>
 use <tests/transformers.scad>
 use <tests/tubings.scad>
@@ -101,7 +105,7 @@ use <tests/SSR_shroud.scad>
 use <tests/PSU_shroud.scad>
 
 x0 = 0;
-x1 = x0 + 100;
+x1 = x0 + 110;
 x2 = x1 + 90;
 x3 = x2 + 130;
 x4 = x3 + 200;
@@ -165,8 +169,8 @@ o_rings_y = springs_y;
 sealing_strip_y = springs_y + 20;
 tubings_y = sealing_strip_y + 20;
 pillars_y = tubings_y + 20;
-leadnuts_y = pillars_y + 40;
-pulleys_y = leadnuts_y +40;
+ball_bearings_y = pillars_y + 40;
+pulleys_y = ball_bearings_y +40;
 hot_ends_y = pulleys_y + 60;
 linear_bearings_y = hot_ends_y + 50;
 sheets_y = linear_bearings_y + 100;
@@ -176,7 +180,7 @@ fans_y = displays_y + 80;
 transformers_y = fans_y + 120;
 psus_y = transformers_y + 190;
 
-translate([x0 + 30, inserts_y])
+translate([x0 + 35, inserts_y])
     inserts();
 
 translate([x0, inserts_y])
@@ -209,10 +213,7 @@ translate([x0, tubings_y])
 translate([x0, pillars_y])
     pillars();
 
-translate([x0, leadnuts_y ])
-    leadnuts();
-
-translate([x0 + 60, leadnuts_y])
+translate([x0, ball_bearings_y])
     ball_bearings();
 
 translate([x0, pulleys_y])
@@ -252,7 +253,9 @@ translate([x0, psus_y]) {
 }
 
 zipties_y = 0;
-bulldogs_y = zipties_y + 40;
+bulldogs_y = zipties_y + 30;
+swiss_clips_y = bulldogs_y + 35;
+leadnuts_y = swiss_clips_y + 50;
 
 translate([x1, zipties_y])
     zipties();
@@ -260,10 +263,18 @@ translate([x1, zipties_y])
 translate([x1, bulldogs_y])
     bulldogs();
 
+translate([x1, swiss_clips_y])
+    swiss_clips();
+
+translate([x1, leadnuts_y])
+    leadnuts();
+
+
 leds_y = 0;
 carriers_y = leds_y + 40;
-spades_y = carriers_y + 40;
-buttons_y = spades_y + 40;
+magnets_y = carriers_y + 40;
+spades_y = magnets_y + 20;
+buttons_y = spades_y + 20;
 jacks_y = buttons_y + 40;
 microswitches_y = jacks_y + 40;
 rockers_y = microswitches_y + 40;
@@ -273,16 +284,19 @@ components_y = toggles_y + 40;
 translate([x2, leds_y])
     leds();
 
-translate([x2 + 40, leds_y])
+translate([x2 + 35, leds_y])
     ldrs();
 
 translate([x2 + 8, carriers_y])
     carriers();
 
-translate([x2+ 38, carriers_y])
-    meters();
+translate([x2, magnets_y])
+    magnets();
 
-translate([x2 + 68, carriers_y])
+translate([x2 + 20, carriers_y])
+    led_meters();
+
+translate([x2 + 70, leds_y])
     fuseholders();
 
 translate([x2, spades_y])
@@ -314,7 +328,8 @@ ssrs_y = modules_y + 80;
 blowers_y = ssrs_y + 60;
 batteries_y = blowers_y + 100;
 steppers_y = batteries_y + 70;
-extrusions_y = steppers_y + 100;
+panel_meters_y = steppers_y + 70;
+extrusions_y = panel_meters_y + 80;
 
 translate([x3, veroboard_y])
     veroboard_test();
@@ -325,6 +340,9 @@ translate([x3 + 70, veroboard_y + 30])
 translate([x3 + 140, veroboard_y + 20])
     pcb_mounts();
 
+translate([x3 + 170, veroboard_y + 16])
+    cameras();
+
 translate([x3, d_connectors_y])
     d_connectors();
 
@@ -355,9 +373,11 @@ translate([x3, batteries_y])
 translate([x2, steppers_y])  // interloper
     stepper_motors();
 
-translate([x2, extrusions_y]) {
+translate([x2, panel_meters_y])
+    panel_meters();
+
+translate([x2, extrusions_y])
     extrusions();
-}
 
 translate([x3, transformers_y])
     transformers();
@@ -370,7 +390,7 @@ sk_brackets_y = extrusion_brackets_y + 80;
 kp_pillow_blocks_y = sk_brackets_y + 50;
 scs_bearing_blocks_y = kp_pillow_blocks_y + 60;
 
-translate([x4 + 150, belts_y + 58]) {
+translate([x4 + 200, belts_y + 58]) {
     belt_test();
 
     translate([0, 60])

printed/box.scad

@@ -31,26 +31,29 @@
 //!
 //! Normally the side sheets are the same type but they can be overridden individually as long as the substitute has the same thickness.
 //
-include <../utils/core/core.scad>
+include <../core.scad>
 use <../vitamins/sheet.scad>
-use <../vitamins/screw.scad>
-use <../vitamins/washer.scad>
 use <../vitamins/insert.scad>
 use <../utils/quadrant.scad>
+use <../utils/round.scad>
 
 bezel_clearance = 0.2;
 sheet_end_clearance = 1;
 sheet_slot_clearance = 0.2;
 
-function box_screw(type)     = type[0]; //! Screw type to be used at the corners
-function box_wall(type)      = type[1]; //! Wall thickness of 3D parts
-function box_sheets(type)    = type[2]; //! Sheet type used for the sides
-function box_top_sheet(type) = type[3]; //! Sheet type for the top
-function box_base_sheet(type)= type[4]; //! Sheet type for the bottom
-function box_feet(type)      = type[5]; //! True to enable feet on the bottom bezel
-function box_width(type)     = type[6]; //! Internal width
-function box_depth(type)     = type[7]; //! Internal depth
-function box_height(type)    = type[8]; //! Internal height
+function box_screw(type)       = type[0]; //! Screw type to be used at the corners
+function box_shelf_screw(type) = type[1]; //! Screw type to hold a shelf
+function box_wall(type)        = type[2]; //! Wall thickness of 3D parts
+function box_sheets(type)      = type[3]; //! Sheet type used for the sides
+function box_top_sheet(type)   = type[4]; //! Sheet type for the top
+function box_base_sheet(type)  = type[5]; //! Sheet type for the bottom
+function box_feet(type)        = type[6]; //! True to enable feet on the bottom bezel
+function box_width(type)       = type[7]; //! Internal width
+function box_depth(type)       = type[8]; //! Internal depth
+function box_height(type)      = type[9]; //! Internal height
+
+function box(screw, wall, sheets, top_sheet, base_sheet, size, feet = false, shelf_screw = M3_dome_screw) = //! Construct a property list for a box.
+ concat([screw, shelf_screw, wall, sheets, top_sheet, base_sheet, feet], size);
 
 function box_bezel_clearance(type) = bezel_clearance;
 
@@ -59,6 +62,7 @@ function box_profile_overlap(type) = 3 + sheet_end_clearance / 2;
 
 function box_washer(type) = screw_washer(box_screw(type));
 function box_insert(type) = screw_insert(box_screw(type));
+function box_shelf_insert(type) = screw_insert(box_shelf_screw(type));
 
 function box_hole_inset(type) = washer_radius(box_washer(type)) + 1;
 function box_insert_r(type) = insert_hole_radius(box_insert(type));
@@ -87,23 +91,32 @@ function box_bezel_height(type, bottom) = //! Bezel height for top or bottom
 
 grill_hole = 5;
 grill_gap = 1.9;
-module grill(width, height, r = 1000, poly = false, h = 0) { //! A staggered array of 5mm holes to make grills in sheets. Can be constrained to be circular. Set ```poly``` ```true``` for printing, ```false``` for milling.
+
+function box_grill_hole_r() = grill_hole / 2;
+
+module grill_hole_positions(width, height, r = 1000) {
     nx = floor(width / (grill_hole + grill_gap));
     xpitch = width / nx;
     ny = floor(height / ((grill_hole + grill_gap) * cos(30)));
     ypitch = height / ny;
 
+    for(y = [0 : ny - 1], x = [0 : nx - 1 - (y % 2)]) {
+        $x = -width / 2 + (x + 0.5 + (y % 2) / 2) * xpitch;
+        $y = -height / 2 + (y + 0.5) * ypitch;
+        if(sqrt(sqr($x) + sqr($y)) + grill_hole / 2 <= r)
+            translate([$x, $y])
+                children();
+    }
+}
+
+module grill(width, height, r = 1000, poly = false, h = 0) { //! A staggered array of 5mm holes to make grills in sheets. Can be constrained to be circular. Set ```poly``` ```true``` for printing, ```false``` for milling.
     extrude_if(h)
-        for(y = [0 : ny - 1], x = [0 : nx - 1 - (y % 2)]) {
-            x = -width / 2 + (x + 0.5 + (y % 2) / 2) * xpitch;
-            y = -height / 2 + (y + 0.5) * ypitch;
-            if(sqrt(sqr(x) + sqr(y)) + grill_hole / 2 <= r)
-                translate([x, y])
-                    if(poly)
-                        poly_circle(r = grill_hole / 2);
-                    else
-                        circle(d = grill_hole);
-        }
+        if(poly)
+            grill_hole_positions(width, height, r)
+                poly_circle(r = grill_hole / 2);
+        else
+            grill_hole_positions(width, height, r)
+                circle(d = grill_hole);
 }
 
 module box_corner_profile_2D(type) { //! The 2D shape of the corner profile.
@@ -175,6 +188,15 @@ module box_corner_profile_section(type, section, sections) { //! Generates inter
     }
 }
 
+module box_corner_profile_sections(type, section, sections) { //! Generate four copies of a corner profile section
+    stl("box_corner_profile");
+    offset = box_boss_r(type) + 1;
+    for(i = [0 : 3])
+        rotate(i * 90)
+            translate([offset, offset])
+                box_corner_profile_section(type, section, sections);
+}
+
 module box_corner_quadrants(type, width, depth)
     for(corner = [0:3]) {
         x = [-1,1,1,-1][corner];
@@ -258,10 +280,11 @@ dowel_length = 20;
 dowel_wall = extrusion_width * 3;
 dowel_h_wall = layer_height * 6;
 
-
 module box_bezel_section(type, bottom, rows, cols, x, y) { //! Generates interlocking sections of the bezel to allow it to be bigger than the printer
-    w = (box_width(type) + 2 * box_outset(type)) / cols;
-    h = (box_depth(type) + 2 * box_outset(type)) / rows;
+    tw = box_width(type) + 2 * box_outset(type);
+    w = tw / cols;
+    th = box_depth(type) + 2 * box_outset(type);
+    h = th / rows;
     bw = box_outset(type) - bezel_clearance / 2;
     bw2 = box_outset(type) + box_inset(type);
 
@@ -336,7 +359,7 @@ module box_bezel_section(type, bottom, rows, cols, x, y) { //! Generates interlo
         render() difference() {
             union() {
                 clip(xmin = 0, xmax = w, ymin = 0, ymax = h)
-                    translate([box_width(type) / 2 + box_outset(type) - x * w, box_depth(type) / 2 + box_outset(type) - y * h, box_profile_overlap(type)])
+                    translate([tw / 2 - x * w, th / 2 - y * h, box_profile_overlap(type)])
                         box_bezel(type, bottom);
 
                 if(x < cols - 1 && y == 0)
@@ -396,7 +419,6 @@ module box_bezel_section(type, bottom, rows, cols, x, y) { //! Generates interlo
     }
 }
 
-
 module box_screw_hole_positions(type)
     for(x = [-1, 1], y = [-1, 1])
         translate([x * (box_width(type) / 2 - box_hole_inset(type)), y * (box_depth(type) / 2 - box_hole_inset(type))])
@@ -439,6 +461,96 @@ module box_shelf_blank(type, sheet = false) { //! Generates a 2D template for a
     }
 }
 
+module box_shelf_screw_positions(type, screw_positions, thickness = 0, wall = undef) { //! Place children at the shelf screw positions
+    w = is_undef(wall) ? box_wall(type) : wall;
+    insert = box_shelf_insert(type);
+    translate_z(-insert_boss_radius(insert, w))
+        for(p = screw_positions)
+            multmatrix(p)
+                translate_z(thickness)
+                    children();
+}
+
+module box_shelf_bracket(type, screw_positions, wall = undef) { //! Generates a shelf bracket, the first optional child is a 2D cutout and the second 3D cutouts
+    stl("shelf_bracket");
+    w = is_undef(wall) ? box_wall(type) : wall;
+    insert = box_shelf_insert(type);
+    lip = 2 * insert_boss_radius(insert, w);
+    width = insert_length(insert) + w;
+
+    module shape()
+        difference() {
+            square([box_width(type), box_depth(type)], center = true);
+
+            offset(bezel_clearance / 2)
+                box_corner_quadrants(type, box_width(type), box_depth(type));
+
+            if($children)
+                hflip()
+                    children();
+        }
+
+    module boss()
+        translate_z(-width + eps)
+            linear_extrude(width - 2 * eps)
+                hull() {
+                    circle4n(r = lip / 2 - eps);
+
+                    translate([-lip / 2, -lip / 2 + eps])
+                        square([lip, eps]);
+                }
+
+    difference() {
+        union() {
+            linear_extrude(w)
+                difference() {
+                    shape()
+                        if($children)
+                            children(0);
+
+                    round(2) offset(-width)
+                        shape()
+                            if($children)
+                                children(0);
+                }
+
+            linear_extrude(lip)
+                difference() {
+                    shape()
+                        if($children)
+                            children(0);
+
+                    offset(-w)
+                        shape()
+                            if($children)
+                                children(0);
+                }
+
+            hflip()
+                box_shelf_screw_positions(type, screw_positions, 0, w)
+                    boss();
+        }
+        if($children > 1)
+            hflip()
+                children(1);
+
+        hflip()
+            box_shelf_screw_positions(type, screw_positions, 0, w)
+                insert_hole(insert, counterbore = 1, horizontal = true);
+    }
+}
+
+module box_shelf_bracket_section(type, rows, cols, x, y) { //! Generates sections of the shelf bracket to allow it to be bigger than the printer
+    tw = box_width(type);
+    w = tw / cols;
+    th = box_depth(type);
+    h = th / rows;
+
+    clip(xmin = 0, xmax = w, ymin = 0, ymax = h)
+        translate([tw / 2 - x * w, th / 2 - y * h])
+            children();
+}
+
 module box_left_blank(type, sheet = false) { //! Generates a 2D template for the left sheet, ```sheet``` can be set to override the type
     dxf("box_left");
 

printed/butt_box.scad

@@ -50,6 +50,9 @@ function bbox_name(type)       = type[8] ? type[8] : "bbox"; //! Optional name i
 function bbox_skip_blocks(type)= type[9] ? type[9] : [];  //! List of fixing blocks to skip, used to allow a hinged panel for example
 function star_washers(type)    = type[10] ? type[10] : is_undef(type[10]); //! Set to false to remove star washers.
 
+function bbox(screw, sheets, base_sheet, top_sheet, span, size, name = "bbox", skip_blocks = [], star_washers = true) = //! Construct the property list for a butt_box
+ [ screw, sheets, base_sheet, top_sheet, span, size.x, size.y, size.z, name, skip_blocks, star_washers ];
+
 function bbox_volume(type) = bbox_width(type) * bbox_depth(type) * bbox_height(type) / 1000000; //! Internal volume in litres
 function bbox_area(type) = let(w =  bbox_width(type), d = bbox_depth(type), h = bbox_height(type)) //! Internal surdface area in m^2
     2 * (w * d + w * h + d * h) / 1000000;
@@ -107,12 +110,9 @@ function fixing_block_positions(type) = let(
 
 function side_holes(type) = [for(p = fixing_block_positions(type), q = fixing_block_holes(bbox_screw(type))) p * q];
 
-module drill_holes(type, t)
-    for(list = [corner_holes(type), side_holes(type)], p = list)
-        let(q = t * p)
-            if(abs(transform([0, 0, 0], q).z) < eps)
-                multmatrix(q)
-                    drill(screw_clearance_radius(bbox_screw(type)), 0);
+module bbox_drill_holes(type, t)
+    position_children(concat(corner_holes(type), side_holes(type)), t)
+        drill(screw_clearance_radius(bbox_screw(type)), 0);
 
 module bbox_base_blank(type) { //! 2D template for the base
     dxf(str(bbox_name(type), "_base"));
@@ -120,7 +120,7 @@ module bbox_base_blank(type) { //! 2D template for the base
     difference() {
         sheet_2D(bbox_base_sheet(type), bbox_width(type), bbox_depth(type), 1);
 
-        drill_holes(type, translate(bbox_height(type) / 2));
+        bbox_drill_holes(type, translate(bbox_height(type) / 2));
     }
 }
 
@@ -133,7 +133,7 @@ module bbox_top_blank(type) { //! 2D template for the top
         translate([0, t / 2])
             sheet_2D(bbox_top_sheet(type), bbox_width(type) + 2 * t, bbox_depth(type) + t);
 
-        drill_holes(type, translate(-bbox_height(type) / 2));
+        bbox_drill_holes(type, translate(-bbox_height(type) / 2));
     }
 }
 
@@ -151,7 +151,7 @@ module bbox_left_blank(type, sheet = false) { //! 2D template for the left side
         translate([-t / 2, -bb / 2])
             sheet_2D(subst_sheet(type, sheet), bbox_depth(type) + t, bbox_height(type) + bb);
 
-        drill_holes(type, rotate([0, 90, 90]) * translate([bbox_width(type) / 2, 0]));
+        bbox_drill_holes(type, rotate([0, 90, 90]) * translate([bbox_width(type) / 2, 0]));
     }
 }
 
@@ -165,7 +165,7 @@ module bbox_right_blank(type, sheet = false) { //! 2D template for the right sid
         translate([t / 2, -bb / 2])
             sheet_2D(subst_sheet(type, sheet), bbox_depth(type) + t, bbox_height(type) + bb);
 
-        drill_holes(type, rotate([0, 90, 90]) * translate([-bbox_width(type) / 2, 0]));
+        bbox_drill_holes(type, rotate([0, 90, 90]) * translate([-bbox_width(type) / 2, 0]));
     }
 }
 
@@ -180,7 +180,7 @@ module bbox_front_blank(type, sheet = false, width = 0) { //! 2D template for th
         translate([0, (bt - bb) / 2])
             sheet_2D(subst_sheet(type, sheet), max(bbox_width(type) + 2 * t, width), bbox_height(type) + bb + bt);
 
-        drill_holes(type, rotate([-90, 0, 0]) * translate([0, bbox_depth(type) / 2]));
+        bbox_drill_holes(type, rotate([-90, 0, 0]) * translate([0, bbox_depth(type) / 2]));
     }
 }
 
@@ -194,7 +194,7 @@ module bbox_back_blank(type, sheet = false) { //! 2D template for the back
         translate([0, -bb / 2])
             sheet_2D(subst_sheet(type, sheet), bbox_width(type), bbox_height(type) + bb);
 
-        drill_holes(type, rotate([-90, 0, 0]) * translate([0, -bbox_depth(type) / 2]));
+        bbox_drill_holes(type, rotate([-90, 0, 0]) * translate([0, -bbox_depth(type) / 2]));
     }
 }
 

printed/door_hinge.scad

@@ -74,7 +74,7 @@ module door_hinge(door_thickness) {                         //! Generates STL fo
                             square([1, thickness + door_thickness]);
                     }
                     translate([dia / 2, thickness + door_thickness / 2])
-                        teardrop(r = screw_clearance_radius(pin_screw), h = 0);
+                        teardrop_plus(r = screw_clearance_radius(pin_screw), h = 0);
                 }
         linear_extrude(thickness)
             difference() {
@@ -127,7 +127,7 @@ module door_hinge_stat_stl() { //! Generates the STL for the stationary part
                             square([dia, 1], center = true);
                     }
                     translate([0, dia / 2 + stat_clearance])
-                        teardrop(r = screw_clearance_radius(pin_screw), h = 0);
+                        teardrop_plus(r = screw_clearance_radius(pin_screw), h = 0);
                }
     }
 }

printed/flat_hinge.scad

@@ -42,6 +42,9 @@ function hinge_screws(type)      = type[8]; //! How many screws
 function hinge_clearance(type)   = type[9]; //! Clearance between knuckles
 function hinge_margin(type)      = type[10]; //! How far to keep the screws from the knuckes
 
+function flat_hinge(name, size, pin_d, knuckle_d, knuckles, screw, screws, clearance, margin) = //! Construct the property list for a flat hinge.
+ [name, size.x, size.y, size.z, pin_d, knuckle_d, knuckles, screw, screws, clearance, margin];
+
 function hinge_radius(type)      = washer_radius(screw_washer(hinge_screw(type))) + 1;
 
 module hinge_screw_positions(type) { //! Place children at the screw positions

printed/foot.scad

@@ -24,8 +24,10 @@
 include <../core.scad>
 use <../vitamins/insert.scad>
 
-foot        = [25, 12, 3, 2, M4_cap_screw, 10];
-insert_foot = [20, 10, 0, 2, M3_cap_screw, 10];
+function Foot(d, h, t, r, screw, slant = 10) = [d, h, t, r, screw, slant]; //! Construct a foot property list
+
+foot        = Foot(25, 12, 3, 2, M4_cap_screw);
+insert_foot = Foot(20, 10, 0, 2, M3_cap_screw);
 
 function insert_foot() = insert_foot; //! Default foot with insert
 

printed/printed_box.scad

@@ -30,6 +30,9 @@ include <../core.scad>
 use <../vitamins/insert.scad>
 use <foot.scad>
 
+function pbox(name, wall, top_t, base_t, radius, size, foot = false, screw = false, ridges = [0, 0]) //! Construct a printed box property list
+    = concat([name, wall, top_t, base_t, foot, screw, radius, ridges], size);
+
 function pbox_name(type)       = type[0]; //! Name to allow more than one box in a project
 function pbox_wall(type)       = type[1]; //! Wall thickness
 function pbox_top(type)        = type[2]; //! Top thickness
@@ -71,11 +74,11 @@ function pbox_mid_offset(type) = pbox_ridges(type).y + pbox_wall(type) / 2; // O
 
 function pbox_screw_inset(type) = //! How far the base screws are inset
     let(foot = pbox_foot(type),
-        r = foot ? foot_diameter(foot) / 2 : washer_radius(pbox_washer(type)),
+        r = foot ? foot_diameter(foot) / 2 : pbox_base(type) ? washer_radius(pbox_washer(type)) : insert_hole_radius(pbox_insert(type)),
         R =  pbox_radius(type)
     ) max(r, R - (R - r) / sqrt(2));
 
-module pbox_screw_positions(type) {
+module pbox_screw_positions(type) { //! Place children at base screw positions
     foot = pbox_foot(type);
     inset = pbox_screw_inset(type);
     for(x = [-1, 1], y = [-1, 1])
@@ -124,6 +127,9 @@ module pbox_inner_shape(type) {
     rounded_square([w, d], rad, center = true);
 }
 
+module pbox_outer_shape(type) //! 2D outer shape of the box
+    offset(pbox_wall(type) / 2) pbox_mid_shape(type);
+
 module pbox_base(type) { //! Generate the STL for the base
     stl(str(pbox_name(type),"_base"));
     t = pbox_base(type);
@@ -158,7 +164,7 @@ module pbox(type) { //! Generate the STL for the main case
     difference() {
         union() {
             linear_extrude(total_height)
-                offset(wall / 2) pbox_mid_shape(type);
+                pbox_outer_shape(type);
 
             if($children > 2)
                 children(2);

printed/ribbon_clamp.scad

@@ -31,7 +31,7 @@ insert = screw_insert(screw);
 screw_depth = insert_length(insert) + 1;
 
 function ribbon_clamp_hole_pitch(ways) = ribbon_clamp_slot(ways) + 2 * min_wall + 2 * corrected_radius(insert_hole_radius(insert)); //! Hole pitch
-function ribbon_clamp_width() = 2 * (insert_hole_radius(insert) + 2); //! Width
+function ribbon_clamp_width() = 2 * (insert_hole_radius(insert) + wall); //! Width
 function ribbon_clamp_length(ways) = ribbon_clamp_hole_pitch(ways) + ribbon_clamp_width(); //! Length given ways
 function ribbon_clamp_height() = screw_depth + 1; //! Height
 

printed/ssr_shroud.scad

@@ -135,7 +135,7 @@ module ssr_shroud_fastened_assembly(type, cable_d, thickness, name) //! Assembly
 
             *translate_z(cable_d / 2)
                 rotate([90, 0, 0])
-                    stl_colour(grey20)
+                    stl_colour(grey(20))
                         cylinder(d = cable_d, h = 20, center = true);
         }
 }

printed/strap_handle.scad

@@ -24,8 +24,7 @@
 include <../core.scad>
 use <../vitamins/insert.scad>
 
-strap = [18, 2, M3_pan_screw, 3, 25];
-function strap() = strap;
+strap = strap();
 
 wall = 2;
 clearance = 0.5;
@@ -40,6 +39,10 @@ function strap_screw(type = strap)     = type[2]; //! Screw type
 function strap_panel(type = strap)     = type[3]; //! Panel thickness
 function strap_extension(type = strap) = type[4]; //! How much length of the strap that can pull out
 
+
+function strap(width = 18, thickness = 2, screw = M3_pan_screw, panel_thickness = 3, extension = 25) = //! Construct a property list for a strap
+ [ width, thickness, screw, panel_thickness, extension ];
+
 function strap_insert(type) = screw_insert(strap_screw(type)); //! The insert type
 function strap_key(type) = strap_panel(type) - panel_clearance;
 function strap_height(type) = wall + max(insert_length(strap_insert(type)) - strap_key(type), strap_thickness(type) + clearance); //! Height of the ends

scripts/bom.py

@@ -213,7 +213,7 @@ def parse_bom(file = "openscad.log", name = None):
                         main.assemblies[stack[-1]].add_part(s)
         else:
             if 'ERROR:' in line or 'WARNING:' in line:
-                print(line[:-1])
+                raise Exception(line[:-1])
     return main
 
 def usage():
@@ -221,53 +221,57 @@ def usage():
     sys.exit(1)
 
 def boms(target = None, assembly = None):
-    bom_dir = set_config(target, usage) + "bom"
-    if assembly:
-        bom_dir += "/accessories"
-        if not os.path.isdir(bom_dir):
+    try:
+        bom_dir = set_config(target, usage) + "bom"
+        if assembly:
+            bom_dir += "/accessories"
+            if not os.path.isdir(bom_dir):
+                os.makedirs(bom_dir)
+        else:
+            assembly = "main_assembly"
+            if os.path.isdir(bom_dir):
+                shutil.rmtree(bom_dir)
+                sleep(0.1)
             os.makedirs(bom_dir)
-    else:
-        assembly = "main_assembly"
-        if os.path.isdir(bom_dir):
-            shutil.rmtree(bom_dir)
-            sleep(0.1)
-        os.makedirs(bom_dir)
-    #
-    # Find the scad file that makes the module
-    #
-    scad_file = find_scad_file(assembly)
-    if not scad_file:
-        raise Exception("can't find source for " + assembly)
-    #
-    # make a file to use the module
-    #
-    bom_maker_name = source_dir + "/bom.scad"
-    with open(bom_maker_name, "w") as f:
-        f.write("use <%s>\n" % scad_file)
-        f.write("%s();\n" % assembly);
-    #
-    # Run openscad
-    #
-    openscad.run("-D", "$bom=2", "-D", "$preview=true", "--hardwarnings", "-o", "openscad.echo", "-d", bom_dir + "/bom.deps", bom_maker_name)
-    os.remove(bom_maker_name)
-    print("Generating bom ...", end=" ")
+        #
+        # Find the scad file that makes the module
+        #
+        scad_file = find_scad_file(assembly)
+        if not scad_file:
+            raise Exception("can't find source for " + assembly)
+        #
+        # make a file to use the module
+        #
+        bom_maker_name = source_dir + "/bom.scad"
+        with open(bom_maker_name, "w") as f:
+            f.write("use <%s>\n" % scad_file)
+            f.write("%s();\n" % assembly);
+        #
+        # Run openscad
+        #
+        openscad.run("-D", "$bom=2", "-D", "$preview=true", "--hardwarnings", "-o", "openscad.echo", "-d", bom_dir + "/bom.deps", bom_maker_name)
+        os.remove(bom_maker_name)
+        print("Generating bom ...", end=" ")
 
-    main = parse_bom("openscad.echo", assembly)
+        main = parse_bom("openscad.echo", assembly)
 
-    if assembly == "main_assembly":
-        main.print_bom(True, open(bom_dir + "/bom.txt","wt"))
+        if assembly == "main_assembly":
+            main.print_bom(True, open(bom_dir + "/bom.txt","wt"))
 
-    for ass in main.assemblies:
-        with open(bom_dir + "/" + ass + ".txt", "wt") as f:
-            bom = main.assemblies[ass]
-            print(bom.make_name(ass) + ":", file=f)
-            bom.print_bom(False, f)
+        for ass in main.assemblies:
+            with open(bom_dir + "/" + ass + ".txt", "wt") as f:
+                bom = main.assemblies[ass]
+                print(bom.make_name(ass) + ":", file=f)
+                bom.print_bom(False, f)
 
-    data = [main.assemblies[ass].flat_data() for ass in main.ordered_assemblies]
-    with open(bom_dir + "/bom.json", 'w') as outfile:
-        json.dump(data, outfile, indent = 4)
+        data = [main.assemblies[ass].flat_data() for ass in main.ordered_assemblies]
+        with open(bom_dir + "/bom.json", 'w') as outfile:
+            json.dump(data, outfile, indent = 4)
 
-    print("done")
+        print("done")
+    except Exception as e:
+        print(str(e))
+        sys.exit(1)
 
 if __name__ == '__main__':
     if len(sys.argv) > 3: usage()
@@ -286,8 +290,4 @@ if __name__ == '__main__':
     if assembly:
         if assembly[-9:] != "_assembly": usage()
 
-    try:
-        boms(target, assembly)
-    except Exception as e:
-        print(str(e))
-        sys.exit(1)
+    boms(target, assembly)

scripts/plateup.py

@@ -27,6 +27,7 @@ import c14n_stl
 from set_config import *
 from deps import *
 from shutil import copyfile
+import re
 
 source_dirs = { "stl" : "platters", "dxf" : "panels" }
 target_dirs = { "stl" : "printed",  "dxf" : "routed" }
@@ -38,43 +39,54 @@ def plateup(target, part_type, usage = None):
     top_dir = set_config(target, usage)
     parts_dir = top_dir + part_type + 's'
     target_dir = parts_dir + '/' + target_dirs[part_type]
-    source_dir = top_dir + source_dirs[part_type]
-    deps_dir = source_dir + "/deps"
-    if not os.path.isdir(source_dir):
-        return
-    if not os.path.isdir(target_dir):
-        os.makedirs(target_dir)
-    if not os.path.isdir(deps_dir):
-        os.makedirs(deps_dir)
+    source_dir1 = source_dirs[part_type]
+    source_dir2 = top_dir + source_dirs[part_type]
     #
-    # Decide which files to make
-    #
-    sources = [file for file in os.listdir(source_dir) if file.endswith('.scad')]
-    #
-    # Run OpenSCAD on the source files to make the targets
+    # Loop through source directories
     #
     used = []
-    for src in sources:
-        src_file = source_dir + '/' + src
-        part_file = target_dir + '/' + src[:-4] + part_type
-        dname = deps_name(deps_dir, src)
-        changed = check_deps(part_file, dname)
-        if changed:
-            print(changed)
-            openscad.run("-D$bom=1", "-d", dname, "-o", part_file, src_file)
-            if part_type == 'stl':
-                c14n_stl.canonicalise(part_file)
-            log_name = 'openscad.log'
-        else:
-            log_name = 'openscad.echo'
-            openscad.run_silent("-D$bom=1", "-o", log_name, src_file)
+    all_sources = []
+    for dir in [source_dir1, source_dir2]:
+        if not os.path.isdir(dir):
+            continue
+        if not os.path.isdir(target_dir):
+            os.makedirs(target_dir)
         #
-        # Add the files on the BOM to the used list
+        # Make the deps dir
         #
-        with open(log_name) as file:
-            for line in file.readlines():
-                if line.startswith('ECHO: "~') and line.endswith('.' + part_type + '"\n'):
-                    used.append(line[8:-2])
+        deps_dir = dir + "/deps"
+        if not os.path.isdir(deps_dir):
+            os.makedirs(deps_dir)
+        #
+        # Decide which files to make
+        #
+        sources = [file for file in os.listdir(dir) if file.endswith('.scad')]
+        all_sources += sources
+        #
+        # Run OpenSCAD on the source files to make the targets
+        #
+        for src in sources:
+            src_file = dir + '/' + src
+            part_file = target_dir + '/' + src[:-4] + part_type
+            dname = deps_name(deps_dir, src)
+            changed = check_deps(part_file, dname)
+            if changed:
+                print(changed)
+                openscad.run("-D$bom=1", "-d", dname, "-o", part_file, src_file)
+                if part_type == 'stl':
+                    c14n_stl.canonicalise(part_file)
+                log_name = 'openscad.log'
+            else:
+                log_name = 'openscad.echo'
+                openscad.run_silent("-D$bom=1", "-o", log_name, src_file)
+            #
+            # Add the files on the BOM to the used list
+            #
+            with open(log_name) as file:
+                for line in file.readlines():
+                    match = re.match(r'^ECHO: "~(.*?\.' + part_type + r').*"$', line)
+                    if match:
+                        used.append(match.group(1))
     #
     # Copy file that are not included
     #
@@ -90,7 +102,7 @@ def plateup(target, part_type, usage = None):
     #
     # Remove any cruft
     #
-    targets = [file[:-4] + part_type for file in sources]
+    targets = [file[:-4] + part_type for file in all_sources]
     for file in os.listdir(target_dir):
         if file.endswith('.' + part_type):
             if not file in targets and not file in copied:

scripts/platters.py

@@ -30,7 +30,7 @@ def usage():
     sys.exit(1)
 
 if __name__ == '__main__':
-   if len(sys.argv) > 2: usage()
+    if len(sys.argv) > 2: usage()
 
     if len(sys.argv) > 1:
         target = sys.argv[1]

scripts/tests.py

@@ -147,7 +147,7 @@ def tests(tests):
                 print("Can't find implementation!")
                 continue
 
-            vsplit = "AKR" + chr(ord('Z') + 1)
+            vsplit = "AJR" + chr(ord('Z') + 1)
             vtype = locations[0][1]
             types = [vtype + ' ' + vsplit[i] + '-'  + chr(ord(vsplit[i + 1]) - 1) for i in range(len(vsplit) - 1)] + [loc[1] for loc in locations[1 :]]
             if type == vtype:
@@ -201,7 +201,7 @@ def tests(tests):
             dname = deps_name(deps_dir, scad.lower())
             oldest = png_name if mtime(png_name) < mtime(bom_name) else bom_name
             changed = check_deps(oldest, dname)
-            changed = times.check_have_time(changed, scad_name.lower())
+            changed = times.check_have_time(changed, scad_name)
             changed = options.have_changed(changed, oldest)
             if changed:
                 print(changed)

scripts/times.py

@@ -48,6 +48,8 @@ def check_have_time(changed, name):
     return changed
 
 def add_time(name, start):
+    if name.lower() in times:
+        del times[name.lower()]
     times[name] = round(time.time() - start, 3)
 
 def print_times():

tests/DIP.scad

@@ -0,0 +1,30 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../core.scad>
+use <../vitamins/dip.scad>
+
+dips = [[6, "OPTO"], [8, "NE555"], [14, "74HC00"], [16, "ULN2003"], [18, "ULN2803"], [20, "74HC245"], [28, "ATMEGA328"]];
+
+module dips()
+    for(i = [0 : len(dips) - 1]) let(dip = dips[i])
+        translate([i * inch(0.5), 0])
+            pdip(dip[0], dip[1], dip[0] > 20);
+
+if($preview)
+    dips();

tests/LED_meters.scad

@@ -0,0 +1,37 @@
+//
+// NopSCADlib Copyright Chris Palmer 2018
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../utils/core/core.scad>
+include <../utils/layout.scad>
+
+include <../vitamins/led_meters.scad>
+
+module led_meters()
+    layout([for(m = led_meters) meter_bezel_length(m)], 5) let(m = led_meters[$i])
+        if($preview) {
+            hflip()
+                meter(m, colour = "blue", value = "123");
+
+            if(!$i)
+                translate([0, meter_bezel_width(m)])
+                    meter_assembly(m, value = "123");
+        }
+        else
+            meter_bezel(m);
+
+led_meters();

tests/PCB.scad

@@ -20,6 +20,8 @@ include <../core.scad>
 include <../vitamins/microswitches.scad>
 include <../vitamins/d_connectors.scad>
 include <../vitamins/leds.scad>
+include <../vitamins/axials.scad>
+include <../vitamins/smds.scad>
 
 use <../vitamins/pcb.scad>
 
@@ -32,7 +34,7 @@ TMC2130 = ["TMC2130", "TMC2130",
     [
         [  10,  1,  0, "-2p54header", 8, 1 ,undef, "blue" ],
         [  10, 13,  0, "-2p54header", 8, 1],
-        [  12,  7,  0, "-chip", 6, 4, 1, grey20 ],
+        [  12,  7,  0, "-chip", 6, 4, 1, grey(20) ],
         // mock up a heat sink
         [  10,  7,  0, "block", 9, 9,  2, TMC2130HeatSinkColor ],
         [  10, 11,  0, "block", 9, 1, 11, TMC2130HeatSinkColor ],
@@ -56,38 +58,51 @@ test_pcb = ["TestPCB", "Test PCB",
     // components
     [
         [ 20, -5, 180, "trimpot10"],
-        [ 20, -15,  0, "trimpot10", true],
-
+        [ 20, -15,  90, "trimpot10", true],
+        [ 10,  2,   90, "smd_led", LED0805, "red"],
+        [ 13,  2,   90, "smd_led", LED0603, "orange"],
+        [ 16,  2,   90, "smd_res", RES1206, "1K"],
+        [ 19,  2,   90, "smd_res", RES0805, "1K"],
+        [ 22,  2,   90, "smd_res", RES0603, "1K"],
         [ 10,  10,   0, "2p54header", 4, 1],
-        [ 25,  10,   0, "2p54header", 5, 1, undef, "blue" ],
+        [ 25,  10,   0, "2p54header", 5, 1, false, "blue" ],
         [ 10,  20,   0, "2p54boxhdr", 4, 2],
         [ 10,  30,   0, "2p54socket", 6, 1],
-        [ 25,  30,   0, "2p54socket", 4, 1, undef, undef, undef, "red" ],
-        [ 10,  40,   0, "chip", 10, 5, 1, grey20],
+        [ 25,  30,   0, "2p54socket", 4, 1, false, 0, false, "red" ],
+        [ 10,  40,   0, "chip", 10, 5, 1, grey(20)],
         [  5,  50,   0, "led", LED3mm, "red"],
         [ 12,  50,   0, "led", LED5mm, "orange"],
         [ 25,  50,   0, "led", LED10mm, "yellow"],
         [ 10,  65, 180, "rj45"],
         [  8,  85, 180, "usb_A"],
         [  8, 105, 180, "usb_Ax2"],
-        [  3, 125, 180, "usb_uA"],
-        [  8, 140, 180, "usb_B"],
-        [  5, 160,   0, "buzzer", 4.5, 8.5],
-        [ 20, 160,   0, "buzzer"],
+        [  3, 140, 180, "usb_uA"],
+        [  8, 155, 180, "usb_B"],
+        [  8.5, 125, 180, "molex_usb_Ax2"],
+        [ 25, 200,   0, "buzzer", 4.5, 8.5],
+        [ 25, 218,   0, "buzzer"],
         [  8, 190, 180, "jack"],
         [  6, 200, 180, "barrel_jack"],
         [  5, 218, 180, "hdmi"],
         [  3, 235, 180, "mini_hdmi"],
         [  6, 175, 180, "uSD", [12, 11.5, 1.4]],
+        [ 65,  12,   0, "ax_res", res1_8, 1000],
+        [ 65,  17,   0, "ax_res", res1_4, 10000],
+        [ 65,  22,   0, "ax_res", res1_2, 100000],
+
+        [ 80,  12,   0, "ax_res", res1_8, 1000000, 1, inch(0.1)],
+        [ 80,  17,   0, "ax_res", res1_4, 100,     2, inch(0.1)],
+        [ 80,  22,   0, "ax_res", res1_2, 10,     10, inch(0.2)],
 
         [ 60,   3,   0, "flex"],
-        [ 50,  15,   0, "flat_flex"],
+        [ 50,  15, -90, "flat_flex"],
+        [ 40,  15, -90, "flat_flex", true],
         [ 60,  35,   0, "D_plug", DCONN9],
 
         [ 50,  50,   0, "molex_hdr", 2],
         [ 50,  60,   0, "jst_xh", 2],
         [ 50,  70, 180, "term254", 3],
-        [ 63,  70, 180, "term254", 3, undef, grey20],
+        [ 63,  70, 180, "term254", 3, undef, grey(20)],
         [ 75,  70, 180, "gterm508",2, undef, "blue"],
 
         [ 50,  90, 180, "gterm35", 4, [1,2]],
@@ -97,7 +112,7 @@ test_pcb = ["TestPCB", "Test PCB",
 
         [ 55, 110, 180, "gterm635", 2],
         [ 75, 110, 180, "gterm635", 2, undef, "blue"],
-        [ 90, 110, 180, "gterm", gt_5x17, 2, undef, grey20],
+        [ 90, 110, 180, "gterm", gt_5x17, 2, undef, grey(20)],
 
         [ 50, 130, 180, "term35", 4],
         [ 70, 130, 180, "term35", 3, "lime"],
@@ -106,8 +121,10 @@ test_pcb = ["TestPCB", "Test PCB",
         [ 50, 170,   0, "button_6mm"],
         [ 50, 185,   0, "microswitch", small_microswitch],
         [ 52, 200,   0, "pcb", 11, TMC2130 ],
+        [ 80, 200,   0, "pdip", 24, "27C32", true, inch(0.6) ],
+        [ 80, 170,   0, "pdip", 8, "NE555" ],
         [ 52, 206,   0, "2p54socket", 8, 1 ],
-        [ 52, 194,   0, "2p54socket", 8, 1, undef, undef, undef, "red" ],
+        [ 52, 194,   0, "2p54socket", 8, 1, false, 0, false, "red" ],
         [ 50, 220,   0, "standoff",  5, 4.5, 12.5, 2.54],
         [ 50, 240,   0, "potentiometer"],
         [ 75, 240,   0, "potentiometer", 7, 8],

tests/SMDs.scad

@@ -1,5 +1,5 @@
 //
-// NopSCADlib Copyright Chris Palmer 2018
+// NopSCADlib Copyright Chris Palmer 2020
 // nop.head@gmail.com
 // hydraraptor.blogspot.com
 //
@@ -17,23 +17,18 @@
 // If not, see <https://www.gnu.org/licenses/>.
 //
 include <../utils/core/core.scad>
+use <../utils/layout.scad>
 
-use <../vitamins/meter.scad>
+include <../vitamins/smds.scad>
 
-module meters()
-    if($preview) {
-        meter_assembly();
+module smds() {
+    layout([for(r = smd_resistors) smd_res_size(r).x], 1)
+        smd_resistor(smd_resistors[$i], ["1R0", "10M", "100K"][$i % 3]);
 
-        translate([0, meter_bezel_width() + 5])
-            vflip()
-                meter_assembly();
+    translate([0, 3])
+        layout([for(l = smd_leds) smd_led_size(l).x], 1)
+            smd_led(smd_leds[$i], ["green", "blue", "red"][$i % 3]);
+}
 
-        translate([0, -meter_bezel_width()])
-            rotate([0, 180, 0])
-                meter(colour = "blue", value = "123");
-    }
-    else
-        meter_bezel();
-
-
-meters();
+if($preview)
+    smds();

tests/Swiss_clips.scad

@@ -0,0 +1,52 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../utils/core/core.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/swiss_clips.scad>
+include <../vitamins/sheets.scad>
+
+glass = glass2;
+bed = AL6;
+gap = sheet_thickness(bed) + sheet_thickness(glass);
+
+module swiss_clips()
+    layout([for(s = swiss_clips) sclip_length(s)], 5, true)
+        let(s = swiss_clips[$i]) {
+            swiss_clip(s);
+
+            translate([0, 20]) {
+                swiss_clip(s, gap);
+
+                translate([20, 0, -5])
+                    render_2D_sheet(bed)
+                        difference() {
+                            sheet_2D(bed, 40, 20, 1);
+
+                            translate([-20, 0])
+                                swiss_clip_hole(s, gap);
+                        }
+
+                translate([20, 0, -1 + eps])
+                    render_sheet(glass) sheet(glass, 40, 20, 1);
+            }
+    }
+
+if($preview)
+    swiss_clips();

tests/axials.scad

@@ -0,0 +1,43 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../core.scad>
+include <../vitamins/pcbs.scad>
+
+
+module axials() {
+    pcb = PERF60x40;
+    pcb(pcb);
+
+    pcb_grid(pcb, 0, 2)
+        rotate(90)
+            wire_link(0.8, inch(0.4));
+
+    for(i = [0 : len(ax_resistors) - 1]) {
+        pcb_grid(pcb, 2 * i + 2, 1 + [0, 0.5, 1.5][i])
+            rotate(90)
+                ax_res(ax_resistors[i], [1000, 47000, 8200][i], 5);
+
+        pcb_grid(pcb, 2 * i + 2, 6.5)
+            rotate(-90)
+                ax_res(ax_resistors[i], [2200, 39000, 8250][i], 1, inch(0.1));
+    }
+}
+
+if($preview)
+    axials();

tests/belts.scad

@@ -60,12 +60,12 @@ module belt_test() {
              [p4.x, p4.y, pulley_pr(GT2x20ob_pulley)]
            ];
     belt = GT2x6;
-    belt(belt, path, 80, [0,  belt_pitch_height(belt) - belt_thickness(belt) / 2]);
+    belt(belt, path, 80, [0,  0]);
 
     translate([-25, 0])
         layout([for(b = belts) belt_width(b)], 10)
             rotate([0, 90, 0])
-                belt(belts[$i], [[0, 0, 20], [0, 1, 20]], belt_colour = $i%2==0 ? grey90 : grey20, tooth_colour = $i%2==0 ? grey70 : grey50);
+                belt(belts[$i], [[0, 0, 20], [0, 1, 20]], belt_colour = $i%2==0 ? grey(90) : grey(20), tooth_colour = $i%2==0 ? grey(70) : grey(50));
 }
 
 if($preview)

tests/box.scad

@@ -23,7 +23,7 @@ use <../vitamins/insert.scad>
 
 use <../printed/box.scad>
 
-box = [M3_dome_screw, 3, DiBond, PMMA3, DiBond6, true, 150, 100, 70];
+box = box(screw = M3_dome_screw, wall = 3, sheets = DiBond, top_sheet = PMMA3, base_sheet = DiBond6, feet = true, size = [150, 100, 70]);
 
 include <../printed/box_assembly.scad>
 

tests/butt_box.scad

@@ -25,7 +25,7 @@ include <../printed/butt_box.scad>
 
 $explode = 0;
 
-box = [M3_dome_screw, DiBond, DiBond6, PMMA3, 250, 400, 300, 120];
+box = bbox(screw = M3_dome_screw, sheets = DiBond, base_sheet = DiBond6, top_sheet = PMMA3, span = 250, size = [400, 300, 120]);
 
 module bbox_assembly() _bbox_assembly(box);
 

tests/cameras.scad

@@ -0,0 +1,31 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../core.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/cameras.scad>
+
+use <../vitamins/pcb.scad>
+
+module cameras()
+    layout([for(c = cameras) pcb_length(camera_pcb(c))], 10, false) let(c = cameras[$i])
+        camera(c);
+
+if($preview)
+    cameras();

tests/components.scad

@@ -41,9 +41,12 @@ module components() {
     translate([0, 50])
         TO220("Generic TO220 package");
 
-    translate([50, 50])
+    translate([40, 50])
         panel_USBA();
 
+    translate([80, 50])
+        fack2spm();
+
     translate([0,80])
         thermal_cutouts();
 

tests/flat_hinge.scad

@@ -32,8 +32,8 @@ clearance = 0.2;
 
 angle = 0; // [-90 : 180]
 
-big_hinge =   ["big",   width, depth, thickness, pin_diameter,  knuckle_diameter, knuckles, M3_dome_screw, screws, clearance, margin];
-small_hinge = ["small", 20,    16,    2,         2.85,          7,                3,        M3_dome_screw, 2,      0.2,       0];
+big_hinge =   flat_hinge(name = "big",  size = [width, depth, thickness], pin_d = pin_diameter, knuckle_d = knuckle_diameter, knuckles = knuckles, screw = M3_dome_screw, screws = screws, clearance = clearance, margin = margin);
+small_hinge = flat_hinge(name = "small", size =[ 20,    16,    2],        pin_d = 2.85,         knuckle_d = 7,                knuckles = 3,        screw = M3_dome_screw, screws = 2,      clearance = 0.2,       margin = 0);
 
 hinges = [small_hinge, big_hinge];
 

tests/gears.scad

@@ -0,0 +1,66 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../utils/core/core.scad>
+use <../utils/gears.scad>
+
+// left gear teeth
+z1 = 39; // [7 : 1 : 99]
+
+// Right gear teeth
+z2 = 7; // [7 : 1 : 99]
+
+//  Modulus
+m = 2.0; // [0.1 : 0.1 : 5.0]
+
+// Pressure angle
+pa = 20; // [14.5, 20, 22.5, 25]
+
+$show_numbers = false;
+
+module gears() {
+    color(pp1_colour)
+        rotate(-$t * 360)
+            linear_extrude(eps, center = true, convexity = z1)
+                difference() {
+                    involute_gear_profile(m, z1, pa);
+
+                    circle(r = m * z1 / 10);
+                }
+
+    color(pp2_colour)
+        translate([centre_distance(m, z1, z2, pa), 0])
+            rotate(180 + 180 / z2 + $t * 360 * z1 / z2)
+               linear_extrude(eps, center = true, convexity = z2)
+                    difference() {
+                         involute_gear_profile(m, z2, pa);
+
+                         circle(r = m * z2 / 10);
+                    }
+
+    z3 = floor((z1 + z2) / PI);
+    angle = -$t * 360 + 90 - floor(z1 / 4) * 360 / z1; // Line up the rack 1/4 turn around the gear
+    pitch = m * PI;
+    color(pp3_colour)
+        translate([(angle % ((z3 / z1) * 360)) / 360 * z1 * pitch, -centre_distance(m, z1, 0, pa)])
+            linear_extrude(eps, center = true)
+                involute_rack_profile(m, z3, 3 * m, pa);
+}
+
+rotate(is_undef($bom) ? 0 : [70, 0, 315])
+    gears();

tests/horiholes.scad

@@ -0,0 +1,90 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+$layer_height = 0.25;
+include <../utils/core/core.scad>
+use <../utils/horiholes.scad>
+
+show_disc = true;
+use_horihole = true;
+thickness = 6;
+length = 60;
+height = 20;
+overlap_x = 15;
+overlap_y = 10;
+
+module hole_positions() {
+    x0 = (length - 40) / 2;
+    for($i = [0 : 4], $z = 5 + $i * layer_height / 5, $r = 3)
+        translate([x0 + $i * 10, $z])
+            children();
+
+    for($i = [0 : 4], $z = 15 + $i * layer_height / 5, $r = 0.5 + $i / 2)
+        translate([x0 + $i * 10, $z])
+            children();
+}
+
+module horiholes_stl(t = thickness) {
+    rotate([90, 0, 0])
+        difference() {
+            linear_extrude(t, center = true) {
+                difference() {
+                    square([length, height]);
+
+                    hole_positions()
+                        if(use_horihole)
+                            horihole($r, $z);
+                        else
+                            teardrop_plus(h = 0, r = $r);
+                }
+            }
+        }
+    if(t == thickness)
+        translate([length / 2, 0])
+            rounded_rectangle([length + 2 * overlap_x, thickness + 2 * overlap_y, 2], 5);
+}
+
+module horiholes() {
+    stl_colour(pp1_colour)
+        rotate([-90, 0, 0])
+            horiholes_stl(eps);
+
+    if(show_disc)
+        hole_positions()
+            color(silver)
+                cylinder(r = $r, h = eps, center = true, $fn = 360);
+
+    hole_positions()
+        color("red")
+            linear_extrude(2 * eps, center = true)
+                intersection() {
+                    difference() {
+                        square(8, center = true);
+
+                        horihole($r, $z);
+                    }
+
+                    circle($r, $fn = 360);
+                }
+}
+
+if($preview)
+    rotate(is_undef($bom) ? 0 : [70, 0, 315])
+        horiholes();
+else
+    horiholes_stl();

tests/magnets.scad

@@ -0,0 +1,29 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../core.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/magnets.scad>
+
+module magnets()
+    layout([for(m = magnets) magnet_od(m)], 5)
+        magnet(magnets[$i]);
+
+if($preview)
+    magnets();

tests/panel_meters.scad

@@ -0,0 +1,29 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <../core.scad>
+use <../utils/layout.scad>
+
+include <../vitamins/panel_meters.scad>
+
+module panel_meters()
+    layout([for(p = panel_meters) pmeter_bezel(p).x], 10)
+        panel_meter(panel_meters[$i]);
+
+if($preview)
+    panel_meters();

tests/printed_box.scad

@@ -21,25 +21,25 @@ include <../core.scad>
 use <../printed/foot.scad>
 use <../printed/printed_box.scad>
 
-foot = [13, 5, 2, 1, M3_pan_screw, 10];
+foot = Foot(d = 13, h = 5, t = 2, r = 1, screw = M3_pan_screw);
 module foot_stl() foot(foot);
 
 wall = 2;
 top_thickness = 2;
 base_thickness = 2;
-case_inner_rad = 8;
+inner_rad = 8;
 
 width = 80;
 depth = 45;
 height = 40;
 
-box1 = ["box1",  wall, top_thickness, base_thickness, false, M2_cap_screw, case_inner_rad, [8, 1], width,  depth, height];
-box2 = ["smooth_box", wall, top_thickness, base_thickness, foot,  false,        case_inner_rad, [0, 0], width,  depth, height];
+box1 = pbox(name = "box1",       wall = wall, top_t = top_thickness, base_t = base_thickness, radius = inner_rad, size = [width, depth, height], screw = M2_cap_screw, ridges = [8, 1]);
+box2 = pbox(name = "smooth_box", wall = wall, top_t = top_thickness, base_t = base_thickness, radius = inner_rad, size = [width, depth, height], foot = foot);
 
 module box1_feet_positions() {
     clearance = 2;
     foot_r = foot_diameter(foot) / 2;
-    x_inset = case_inner_rad + foot_r - pbox_ridges(box1).y;
+    x_inset = inner_rad + foot_r - pbox_ridges(box1).y;
     z_inset = foot_r + clearance;
     h = height + base_thickness;
 
@@ -67,7 +67,7 @@ module box1_external_additions() {
 
 module box1_holes() {
     box1_feet_positions()
-        teardrop(r = screw_pilot_hole(foot_screw(foot)), h = 10, center = true);
+        teardrop_plus(r = screw_pilot_hole(foot_screw(foot)), h = 10, center = true);
 }
 
 

tests/rails.scad

@@ -25,15 +25,15 @@ use <../vitamins/nut.scad>
 sheet = 3;
 
 module rails()
-    layout([for(l = rails) carriage_width(rail_carriage(l))], 25)
+    layout([for(l = rails) carriage_width(rail_carriage(l))], 20)
         rotate(-90) {
             rail = rails[$i];
-            length = rail == MGN15 ? 260 : 200;
+            length = 200;
             screw = rail_screw(rail);
             nut = screw_nut(screw);
             washer = screw_washer(screw);
 
-            rail_assembly(rail, length, rail_travel(rail, length) / 2, $i<2 ? grey20 : "green", $i<2 ? grey20 : "red");
+            rail_assembly(rail, length, rail_travel(rail, length) / 2, $i<2 ? grey(20) : "green", $i<2 ? grey(20) : "red");
 
             rail_screws(rail, length, sheet + nut_thickness(nut, true) + washer_thickness(washer));
 

tests/teardrops.scad

@@ -41,7 +41,10 @@ module teardrops() {
 
                         translate([20, 10])
                             semi_teardrop(h = 0, r = 3);
-                    }
+
+                        translate([20, 20])
+                            teardrop(h = 0, r = 3, truncate = false, plus = true);
+                   }
                 }
                 translate([40, 0, 1.5]) {
                     h = 3 + eps;
@@ -61,6 +64,9 @@ module teardrops() {
 
                     translate([20, 10])
                         semi_teardrop(h = h, r = 3, chamfer = chamfer);
+
+                    translate([20, 20])
+                        teardrop(h = h, r = 3, truncate = false, plus = false, chamfer = chamfer);
                 }
             }
 }

tests/thread.scad

@@ -26,27 +26,27 @@ profile = thread_profile(pitch / 2, pitch * 0.366, 30);
 
 module threads()
     for(female = [false, true]) translate([0, female ? -20 : 0]) {
-    length = female ? 8  : 40;
-    dia = female ? 8 : 8 - pitch;
-    colour = female ? brass : silver;
+        length = female ? 8  : 40;
+        dia = female ? 8 : 8 - pitch;
+        colour = female ? brass : silver;
 
-    thread(dia, starts * pitch, length, profile, starts = starts, top = 45, bot = 45, female = female, colour = colour);
+        thread(dia, starts * pitch, length, profile, starts = starts, top = 45, bot = 45, female = female, colour = colour);
 
-    color(colour)
-        translate([20, 0])
-            thread(dia, starts * pitch, length, profile, starts = starts, top = 0, bot = 0, female = female);
+        color(colour)
+            translate([20, 0])
+                thread(dia, starts * pitch, length, profile, starts = starts, top = 0, bot = 0, female = female);
 
-    translate([40, 0])
-        thread(dia, starts * pitch, length, profile, starts = starts, top = -1, bot = -1, female = female, colour = colour);
+        translate([40, 0])
+            thread(dia, starts * pitch, length, profile, starts = starts, top = -1, bot = -1, female = female, colour = colour);
 
-    color(colour)
-        translate([60, 0])
-            thread(dia, 2 * pitch, length, profile, starts = 2, top = -1, bot = -1, female = female);
+        color(colour)
+            translate([60, 0])
+                thread(dia, 2 * pitch, length, profile, starts = 2, top = -1, bot = -1, female = female);
 
-    color(colour)
-        translate([80, 0])
-            thread(dia, pitch, length, profile, starts = 1, top = -1, bot = -1, female = female);
-}
+        color(colour)
+            translate([80, 0])
+                thread(dia, pitch, length, profile, starts = 1, top = -1, bot = -1, female = female);
+    }
 
 let($show_threads = true)
     threads();

utils/core/core.scad

@@ -28,12 +28,12 @@ use <global.scad>
 
 module use_stl(name) {               //! Import an STL to make a build platter
     stl(name);
-
-    import(str("../stls/", name, ".stl"));
+    path = is_undef($target) ? "../stls/" : str("../", $target, "/stls/");
+    import(str(path, name, ".stl"));
 }
 
 module use_dxf(name) {               //! Import a DXF to make a build panel
     dxf(name);
-
-    import(str("../dxfs/", name, ".dxf"));
+    path = is_undef($target) ? "../dxfs/" : str("../", $target, "/dxfs/");
+    import(str(path, name, ".dxf"));
 }

utils/core/polyholes.scad

@@ -36,29 +36,29 @@ module poly_cylinder(r, h, center = false, sides = 0) //! Make a cylinder adjust
     extrude_if(h, center)
         poly_circle(r, sides);
 
-module poly_ring(or, ir) { //! Make a 2D ring adjusted to have the correct internal radius
-    cir = corrected_radius(ir);
+module poly_ring(or, ir, sides = 0) { //! Make a 2D ring adjusted to have the correct internal radius
+    cir = corrected_radius(ir, sides);
     filaments = (or - cir) / extrusion_width;
     if(filaments > 3 + eps)
         difference() {
             circle(or);
 
-            poly_circle(ir);
+            poly_circle(ir, sides);
         }
     else
         if(filaments >= 2)
             difference() {
                 offset(or - cir)
-                    poly_circle(ir);
+                    poly_circle(ir, sides);
 
-                poly_circle(ir);
+                poly_circle(ir, sides);
             }
             else
                 difference() {
-                    poly_circle(or);
+                    poly_circle(or, sides);
 
                     offset(-squeezed_wall)
-                        poly_circle(or);
+                        poly_circle(or, sides);
                 }
 }
 
@@ -66,9 +66,16 @@ module poly_tube(or, ir, h, center = false) //! Make a tube adjusted to have the
     extrude_if(h, center)
         poly_ring(or, ir);
 
-module drill(r, h = 100) //! Make a cylinder for drilling holes suitable for CNC routing, set h = 0 for circle
-    extrude_if(h)
+module drill(r, h = 100, center = true) //! Make a cylinder for drilling holes suitable for CNC routing, set h = 0 for circle
+    extrude_if(h, center)
         circle(r = corrected_radius(r, r2sides(r)));
+
+module poly_drill(r, h = 100, center = true) //! Make a cylinder for drilling holes suitable for CNC routing if cnc_bit_r is non zero, otherwise a poly_cylinder.
+    if(cnc_bit_r)
+        drill(r, h, center = true);
+    else
+        poly_cylinder(r, h, center);
+
 //
 // Horizontal slot
 //

utils/core/teardrops.scad

@@ -20,17 +20,32 @@
 //
 //! For making horizontal holes that don't need support material.
 //! Small holes can get away without it, but they print better with truncated teardrops.
+//!
+//! Using teardrop_plus() or setting the plus option on other modules will elongate the teardrop vertically by the layer height, so when sliced the staircase tips
+//! do not intrude into the circle. See <https://hydraraptor.blogspot.com/2020/07/horiholes-2.html>
 //
-module teardrop(h, r, center = true, truncate = true, chamfer = 0) { //! For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging
+module teardrop(h, r, center = true, truncate = true, chamfer = 0, plus = false) { //! For making horizontal holes that don't need support material, set ```truncate = false``` to make traditional RepRap teardrops that don't even need bridging
     module teardrop_2d(r, truncate) {
-        hull() {
-            circle4n(r);
-            if(truncate)
-                translate([0, r / 2])
-                    square([2 * r * (sqrt(2) - 1), r], center = true);
-            else
-                polygon([[0, 0], [eps, 0], [0, r * sqrt(2)]]);
-        }
+        er = layer_height / 2 - eps;    // Extrustion edge radius
+        R = plus ? r + er : r;          // Corrected radius
+        offset = plus ? -er : 0;        // Offset inwards
+        hull()
+            for(side = [0 : 1])
+                mirror([side, 0, 0])
+                    intersection() {
+                        hull()
+                        translate([offset, 0]) {
+                            circle4n(R);
+
+                            if(truncate)
+                                translate([0, R / 2])
+                                    square([2 * R * (sqrt(2) - 1), R], center = true);
+                            else
+                                polygon([[0, 0], [eps, 0], [0, R * sqrt(2)]]);
+                        }
+                        translate([0, -2 * R])
+                            square([R, 4 * R]);
+                    }
     }
 
     render(convexity = 5)
@@ -40,23 +55,23 @@ module teardrop(h, r, center = true, truncate = true, chamfer = 0) { //! For mak
     teardrop_chamfer(h, center, chamfer) {
         linear_extrude(eps, center = true)
             teardrop_2d(r + chamfer / 2, truncate);
+
         translate_z(-chamfer / 2)
             linear_extrude(eps, center = true)
                 teardrop_2d(r, truncate);
     }
 }
 
-module semi_teardrop(h, r, d = undef, center = true, chamfer = 0) { //! A semi teardrop in the positive Y domain
-    module semi_teardrop_2d(r, d) {
+module semi_teardrop(h, r, d = undef, center = true, chamfer = 0, plus = false) { //! A semi teardrop in the positive Y domain
+    module semi_teardrop_2d(r, d)
         intersection() {
             R = is_undef(d) ? r : d / 2;
-            teardrop(r = R, h = 0);
+            teardrop(r = R, h = 0, plus = plus);
 
             sq = R + 1;
             translate([-sq, 0])
                 square([2 * sq, sq]);
         }
-    }
 
     render(convexity = 5)
         extrude_if(h, center)
@@ -65,22 +80,21 @@ module semi_teardrop(h, r, d = undef, center = true, chamfer = 0) { //! A semi t
     teardrop_chamfer(h, center, chamfer) {
         linear_extrude(eps, center = true)
             semi_teardrop_2d(r + chamfer / 2, d);
+
         translate_z(-chamfer / 2)
             linear_extrude(eps, center = true)
                 semi_teardrop_2d(r, d);
     }
 }
 
-module teardrop_plus(h, r, center = true, truncate = true, chamfer = 0) //! Slightly bigger teardrop to allow for the 3D printing staircase effect
-    teardrop(h, r + layer_height / 4, center, truncate, chamfer);
+module teardrop_plus(h, r, center = true, truncate = true, chamfer = 0) //! Slightly elongated teardrop to allow for the 3D printing staircase effect
+    teardrop(h, r, center, truncate, chamfer, plus = true);
 
-module tearslot(h, r, w, center = true, chamfer = 0) { //! A horizontal slot that doesn't need support material
-    module tearslot_2d(r, w) {
-        hull() {
-            translate([-w / 2, 0]) teardrop(r = r, h = 0);
-            translate([w / 2, 0]) teardrop(r = r, h = 0);
-        }
-    }
+module tearslot(h, r, w, center = true, chamfer = 0, plus = false) { //! A horizontal slot that doesn't need support material
+    module tearslot_2d(r, w)
+        hull()
+            for(x = [-1, 1])
+                translate([x * w / 2, 0]) teardrop(r = r, h = 0, plus = plus);
 
     extrude_if(h, center)
         tearslot_2d(r, w);
@@ -88,19 +102,19 @@ module tearslot(h, r, w, center = true, chamfer = 0) { //! A horizontal slot tha
     teardrop_chamfer(h, center, chamfer) {
         linear_extrude(eps, center = true)
             tearslot_2d(r + chamfer / 2, w);
+
         translate_z(-chamfer / 2)
             linear_extrude(eps, center = true)
                 tearslot_2d(r, w);
     }
 }
 
-module vertical_tearslot(h, r, l, center = true, chamfer = 0) { //! A vertical slot that doesn't need support material
-    module vertical_tearslot_2d(r, l) {
-        hull() {
-            translate([0,  l / 2]) teardrop(0, r, true);
-            translate([0, -l / 2]) circle4n(r);
-        }
-    }
+module vertical_tearslot(h, r, l, center = true, chamfer = 0, plus = false) { //! A vertical slot that doesn't need support material
+    module vertical_tearslot_2d(r, l)
+        hull()
+            for(y = [-1, 1])
+                translate([0,  y * l / 2])
+                    teardrop(0, r, true, plus = plus);
 
     extrude_if(h, center)
         vertical_tearslot_2d(r, l);
@@ -108,6 +122,7 @@ module vertical_tearslot(h, r, l, center = true, chamfer = 0) { //! A vertical s
     teardrop_chamfer(h, center, chamfer) {
         linear_extrude(eps, center = true)
             vertical_tearslot_2d(r + chamfer / 2, l);
+
         translate_z(-chamfer / 2)
             linear_extrude(eps, center = true)
                 vertical_tearslot_2d(r, l);
@@ -123,4 +138,3 @@ module teardrop_chamfer(h, center, chamfer) { //! Helper module for adding chamf
                         hull()
                             children();
 }
-

utils/gears.scad

@@ -0,0 +1,138 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+//! Utilities for making involute gears.
+//!
+//! Formulas from <https://khkgears.net/new/gear_knowledge/gear_technical_reference/involute_gear_profile.html>
+//! <https://khkgears.net/new/gear_knowledge/gear_technical_reference/calculation_gear_dimensions.html>
+//! and <https://www.tec-science.com/mechanical-power-transmission/involute-gear/calculation-of-involute-gears/>
+//!
+//! ```involute_gear_profile()``` returns a polygon that can have the bore and spokes, etc, subtracted from it before linear extruding it to 3D.
+//! Helical gears can be made using ```twist``` and bevel gears using ```scale``` parameters of ```linear_extrude()```.
+//!
+//! Gears with less than 19 teeth (when pressure angle is 20) are profile shifted to avoid undercutting the tooth root. 7 teeth is considered
+//! the practical minimum.
+//!
+//! The clearance between tip and root defaults to module / 6, but can be overridden by setting the ```clearance``` parameter.
+//!
+//! The origin of the rack is the left end of the pitch line and its width is below the pitch line. I.e. it does not include the addendum.
+//!
+//! ```involute_worm_profile()``` returns a tooth profile that can be passed to ```thread()``` to make worms.
+//
+include <core/core.scad>
+use <maths.scad>
+
+function involute(r, u) = let(a = degrees(u), c = cos(a), s = sin(a)) r * [c + u * s, s - u * c]; //! Involute of circle radius r at angle u in radians
+
+function profile_shift(z, pa) = z ? max(1 - z * sqr(sin(pa)) / 2, 0) : 0; //! Calculate profile shift for small gears
+
+function centre_distance(m, z1, z2, pa = 20) = //! Calculate distance between centres taking profile shift into account
+    let(x1 = profile_shift(z1, pa), x2 = profile_shift(z2, pa)) m * (z1/2 + z2/2 + x1 + x2);
+
+function involute_gear_od(m, z, pa = 20) = //! involute gear outside diameter given modulus, tooth count and pressure angle
+    m * (z + 2 * profile_shift(z, pa) + 2);
+
+module involute_gear_profile(m, z, pa = 20, clearance = undef, steps = 20) { //! Calculate gear profile given module, number of teeth and pressure angle
+    assert(z >= 7, "Gears must have at least 7 teeth.");
+    d = m * z;                                                  // Reference pitch circle diameter
+    x = profile_shift(z, pa);                                   // Profile shift
+    c = is_undef(clearance) ? m / 6 : clearance;                // Clearance from tip to root
+
+    base_d = d * cos(pa);                                       // Base diameter
+    root_r = d / 2 + m * (x - 1) - c;                           // Root radius (dedendum circle radius)
+    tip_d = d + 2 * m * (1 + x);                                // Tip diameter (addendum circle diameter)
+    tpa = acos(base_d / tip_d);                                 // Tip pressure angle
+    inva = tan(pa) - radians(pa);                               // Involute alpha
+    invaa = tan(tpa) - radians(tpa);                            // Involute alphaa
+    ta =  PI / (2 * z) + 2 * x * tan(pa) / z + inva - invaa;    // Tooth tip thickness angle, radians
+    crest_w = ta * tip_d;                                       // Crest width
+    umax = sqrt(sqr(tip_d / base_d) - 1);                       // Max value of the involute parameter
+
+    base_r = base_d / 2;
+    p1 = involute(base_r, 0);
+    p2 = involute(base_r, umax);
+    dist = norm(p2 - p1);                                       // distance between beginning and end of the involute curve
+
+    base_angle = 2 * acos((sqr(base_r) + sqr(tip_d / 2) - sqr(dist)) / base_r / tip_d) + degrees(2 * ta);
+    root_angle = 360 / z - base_angle;
+    root_circle_r = base_r * sin(root_angle / 2);
+
+    if(!is_undef($show_numbers) && $show_numbers) {
+        echo(d=d);
+        echo(base_d=base_d);
+        echo(tip_d=tip_d);
+        echo(tpa = tpa);
+        echo(inva=inva);
+        echo(invaa=invaa);
+        echo(x=x);
+        echo(ta=ta);
+        echo(crest_w=crest_w);
+        echo(umax = umax);
+        echo(base_angle=base_angle);
+        echo(root_angle=root_angle);
+    }
+    involute = [for(i = [0 : steps], u = umax * i / steps) involute(base_r, u)]; // involute for the bottom side of the tooth
+    truncated = [for(p = involute) if((rot2_z(-base_angle / 2) * p).y <= 0) p];  // removed any above the centreline to prevent overlap
+    reflection = reverse([for(p = truncated) rot2_z(base_angle) * [p.x, -p.y] ]); // reflect and rotate to make the top edge
+
+    root = reverse([for(a = [90 : 180 / steps : 270]) rot2_z(base_angle + root_angle / 2) * ([base_r, 0] + root_circle_r * [cos(a), sin(a)]) ]);
+    tooth = concat(truncated, reflection, root);
+    gear = concat([for(i = [0 : z - 1], p = tooth) rot2_z(i * 360 / z) * p]);
+    rotate(-base_angle / 2)
+        union() {
+            polygon(gear);
+
+            circle(root_r);
+        }
+}
+
+function involute_rack_tooth_profile(m, pa = 20, clearance = undef) = //! Calculate rack tooth profile given module and pressure angle
+    let(p = PI * m,                                     // Pitch
+        ha = m,                                         // Addendum
+        c = is_undef(clearance) ? m / 4 : clearance,    // Tip root clearance
+        hf = m + c,                                     // Dedendum
+        hw = 2 * m,                                     // Working depth
+        h = ha + hf,                                    // Tooth depth
+        crest_w = p / 2 - 2 * ha * tan(pa),             // Crest width
+        base_w = crest_w + 2 * hw * tan(pa),            // Base width
+        root_w = p - base_w,                            // Root width
+        clearance_w = root_w - 2 * c * tan(pa),         // Width of clearance without fillet
+        kx = tan(pa / 2 + 45),                          // Fillet ratio of radius and xoffset
+        pf = min(0.38 * m, kx * clearance_w / 2),       // Dedendum fillet radius
+        x = pf / kx,                                    // Fillet centre x offset from corner
+        sides = ceil(r2sides(pf) * (90 - pa) / 360),    // Fillet facets taking $fa, $fs and $fn into account
+        fillet = [ for(i = [0 : sides - 1], a = i * (90 - pa) / sides + 270) [clearance_w / 2 - x,  -hf + pf] + pf * [cos(a), sin(a)] ],
+        reflection = reverse([for(pt = fillet) [p - pt.x, pt.y] ]) // reflect for trailing edge
+    ) concat(fillet, [ [root_w / 2, -hw / 2], [p / 2 - crest_w / 2, ha], [p / 2 + crest_w / 2, ha], [p - root_w / 2, -hw / 2] ], reflection);
+
+module involute_rack_profile(m, z, w, pa = 20, clearance = undef) { //! Calculate rack profile given module, number of teeth and pressure angle
+    p = PI * m;                                     // Pitch
+    hf = 1.25 * m;                                  // Dedendum
+    tooth = involute_rack_tooth_profile(m, pa, clearance);
+    teeth = [for(i = [0 : z - 1], pt = tooth) [pt.x + i * p, pt.y] ];
+
+    polygon(concat([[0, -w], [0, -hf]], teeth, [[z * p, -hf ], [z * p, -w]])); // Add the corners
+}
+
+function involute_worm_profile(m, pa = 20, clearance = undef) = //! Calculate worm profile suitable for passing to thread()
+    let(tooth = involute_rack_tooth_profile(m),
+        pitch = PI * m,
+        y_min = min([for(p = tooth) p.y])
+    ) [for(p = tooth) [p.x - pitch / 2, p.y - y_min, 0]];   // Offset to be positive in y, centred in x and add 0 z ordintate

utils/hanging_hole.scad

@@ -39,11 +39,13 @@ module hanging_hole(z, ir, h = 100, h2 = 100) { //! Hole radius ```ir``` hanging
     infill_angle = z % (2 * layer_height) ? -45 : 45;
     below = min(z + eps, h2);
     big = 1000;
-
     render(convexity = 3) translate_z(z)
         union() {
             translate_z(2 * layer_height)
-                polyhole(ir - eps, h - 2 * layer_height);
+                if(sides(ir) > 4)
+                    polyhole(ir - eps, h - 2 * layer_height);
+                else
+                    poly_cylinder(ir, h - 2 * layer_height);
 
             difference() {
                 translate_z(-below)

utils/horiholes.scad

@@ -0,0 +1,55 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+//! Utilities for depicting the staircase slicing of horizontal holes made with [`teardrop_plus()`](#teardrops), see <https://hydraraptor.blogspot.com/2020/07/horiholes-2.html>
+//
+include <../utils/core/core.scad>
+
+function teardrop_plus_x(r, y, h) = //! Calculate the ordinate of a compensated teardrop given y and layer height.
+    let(fr = h / 2,
+        hpot = r + fr,
+        x2 = sqr(hpot) - sqr(y),
+        x = x2 > 0 ? sqrt(x2) : 0
+    )
+    max(0,
+        y < hpot / sqrt(2) ? x - fr :
+        y < hpot           ? hpot * sqrt(2) - y - fr :
+        0);
+
+module horihole(r, z, h = 0, center = true) { //! For making horizontal holes that don't need support material and are correct dimensions
+    bot_layer = floor((z - r) / layer_height);
+    top_layer = ceil((z + r) / layer_height);
+    render(convexity = 5)
+        extrude_if(h, center)
+            for(i = [bot_layer : top_layer]) {
+                Z = i * layer_height;
+                y = Z - z + layer_height / 2;
+                x = teardrop_plus_x(r, y, layer_height);
+                if(x > 0)
+                    translate([0, y])
+                        difference() {
+                            square([2 * x + layer_height, layer_height], center = true);
+
+                            for(end = [-1, 1])
+                                translate([end * (x + layer_height / 2), 0])
+                                    circle(d = layer_height, $fn = 32);
+                        }
+             }
+}

utils/layout.scad

@@ -28,6 +28,6 @@ function layout_offset(widths, i, gap = 2) = //! Calculate the offset for the ``
 
 module layout(widths, gap = 2, no_offset = false) //! Layout children passing ```$i```
     translate([no_offset ? -widths[0] / 2 : 0, 0])
-        for($i = [0 : len(widths) - 1])
+        for($i = [0 : 1 : len(widths) - 1])
             translate([layout_offset(widths, $i, gap), 0])
                 children();

utils/maths.scad

@@ -20,7 +20,10 @@
 //
 //! Maths utilities for manipulating vectors and matrices.
 //
-function sqr(x) = x * x;
+function sqr(x) = x * x;                        //! Square x
+function radians(degrees) = degrees * PI / 180; //! Convert radians to degrees
+function degrees(radians) = radians * 180 / PI; //! Convert degrees to radians
+
 
 function translate(v) = let(u = is_list(v) ? len(v) == 2 ? [v.x, v.y, 0] //! Generate a 4x4 translation matrix, ```v``` can be ```[x, y]```, ```[x, y, z]``` or ```z```
                                                          : v
@@ -63,6 +66,12 @@ function rot3_z(a) = //! Generate a 3x3 matrix to rotate around z
           [ s,  c,  0],
           [ 0,  0,  1] ];
 
+function rot2_z(a) = //! Generate a 2x2 matrix to rotate around z
+    let(c = cos(a),
+        s = sin(a))
+        [ [ c, -s],
+          [ s,  c] ];
+
 function scale(v) = let(s = is_list(v) ? v : [v, v, v]) //!  Generate a 4x4 matrix that scales by ```v```, which can be a vector of xyz factors or a scalar to scale all axes equally
                         [
                           [s.x, 0,   0,   0],
@@ -90,3 +99,42 @@ function euler(R) = let(ay = asin(-R[2][0]), cy = cos(ay)) //! Convert a rotatio
     cy ? [ atan2(R[2][1] / cy, R[2][2] / cy), ay, atan2(R[1][0] / cy, R[0][0] / cy) ]
        : R[2][0] < 0 ? [atan2( R[0][1],  R[0][2]),  180, 0]
                      : [atan2(-R[0][1], -R[0][2]), -180, 0];
+
+module position_children(list, t) //! Position children if they are on the Z = 0 plane when transformed by t
+    for(p = list)
+        let(q = t * p)
+            if(abs(transform([0, 0, 0], q).z) < 0.01)
+                multmatrix(q)
+                    children();
+
+// Matrix inversion: https://www.mathsisfun.com/algebra/matrix-inverse-row-operations-gauss-jordan.html
+
+function augment(m) = let(l = len(m), n = identity(l)) [ //! Augment a matrix by adding an identity matrix to the right
+    for(i = [0 : l - 1])
+        concat(m[i], n[i])
+];
+
+function rowswap(m, i, j) = [ //! Swap two rows of a matrix
+    for(k = [0 : len(m) - 1])
+        k == i ? m[j] : k == j ? m[i] : m[k]
+];
+
+function solve_row(m, i) = let(diag = m[i][i]) [ //! Make diagonal one by dividing the row by it and subtract from other rows to make column zero
+    for(j = [0 : len(m) - 1])
+        i == j ? m[j] / diag : m[j] - m[i] * m[j][i] / diag
+];
+
+function nearly_zero(x) = abs(x) < 1e-5; //! True if x is close to zero
+
+function solve(m, i = 0, j = 0) = //! Solve each row ensuring diagonal is not zero
+    i < len(m) ?
+        assert(i + j < len(m), "matrix is singular")
+         solve(!nearly_zero(m[i + j][i]) ? solve_row(j ? rowswap(m, i, i + j) : m, i) : solve(m, i, j + 1), i + 1)
+        : m;
+
+function invert(m) = let(n =len(m), m = solve(augment(m))) [ //! Invert a matrix
+    for(i = [0 : n - 1]) [
+        for(j = [n : 2 * n - 1])
+             each m[i][j]
+    ]
+];

utils/quadrant.scad

@@ -23,18 +23,21 @@
 include <../utils/core/core.scad>
 
 module quadrant(w, r, center = false) { //! Draw a square with one rounded corner, can be centered on the arc centre, when ```center``` is ```true```.
-    offset = center ? r - w : 0;
-    translate([offset, offset])
+    h = is_list(w) ? w.y : w;
+    w = is_list(w) ? w.x : w;
+    offset_w = center ? r - w : 0;
+    offset_h = center ? r - h : 0;
+    translate([offset_w, offset_h])
         hull() {
             intersection() {
-                translate([w - r, w - r])
+                translate([w - r, h - r])
                     circle4n(r);
 
-                square(w);
+                square([w, h]);
             }
 
             square([w, eps]);
 
-            square([eps, w]);
+            square([eps, h]);
         }
 }

utils/thread.scad

@@ -26,6 +26,8 @@
 //! Threads are by default solid, so the male version is wrapped around a cylinder and the female inside a tube. This can be suppressed to just get the helix, for
 //! example to make a printed pot with a screw top lid.
 //!
+//! A left hand thread can be made by using mirror([0,1]).
+//!
 //! Threads with a typical 60 degree angle appear too bright with OpenSCAD's primitive lighting model as they face towards the lights more than the top and sides of
 //! a cylinder. To get around this a colour can be passed to thread that is used to colour the cylinder and then toned down to colour the helix.
 //!
@@ -47,7 +49,7 @@ function thread_profile(h, crest, angle, overlap = 0.1) = //! Create thread prof
     let(base = crest + 2 * (h + overlap) * tan(angle / 2))
         [[-base / 2, -overlap, 0], [-crest / 2, h, 0], [crest / 2, h, 0], [base / 2, -overlap, 0]];
 
-module thread(dia, pitch, length, profile, center = true, top = -1, bot = -1, starts = 1, solid = true, female = false, colour = undef) { //! Create male or femail thread, ends can be tapered, chamfered or square
+module thread(dia, pitch, length, profile, center = true, top = -1, bot = -1, starts = 1, solid = true, female = false, colour = undef) { //! Create male or female thread, ends can be tapered, chamfered or square
     //
     // Apply colour if defined
     //
@@ -61,10 +63,12 @@ module thread(dia, pitch, length, profile, center = true, top = -1, bot = -1, st
     // Extract some properties from the profile, perhaps they should be stored in it.
     //
     h = max([for(p = sprofile) p.y]);
-    maxx = max([for(p = sprofile) p.x]);
-    minx = min([for(p = sprofile) p.x]);
-    crest_xmax = max([for(p = sprofile) if(p.x != maxx) p.x]);
-    crest_xmin = min([for(p = sprofile) if(p.x != minx) p.x]);
+    xs = [for(p = sprofile) p.x];
+    maxx = max(xs);
+    minx = min(xs);
+    crest_xs = [for(p = sprofile) if(p.y == h) p.x];
+    crest_xmax = max(crest_xs);
+    crest_xmin = min(crest_xs);
     //
     // If the ends don't taper we need an extra half turn past the ends to be cropped horizontally.
     //
@@ -129,11 +133,13 @@ module thread(dia, pitch, length, profile, center = true, top = -1, bot = -1, st
                     render() intersection() {
                         polyhedron(points, ends_faces);
 
-                        len = length - 2 * eps;
+                        shorten = !is_undef(colour);
+                        len = shorten ? length - 2 * eps : length;
+                        offset = shorten ? eps : 0;
                         rotate_extrude()
                             if(female) {
                                 difference() {
-                                    translate([0, eps])
+                                    translate([0, offset])
                                         square([r + h + overlap, len]);
 
                                     if(top_chamfer_h)
@@ -146,7 +152,7 @@ module thread(dia, pitch, length, profile, center = true, top = -1, bot = -1, st
                             else
                                 difference() {
                                     hull() {
-                                        translate([0, eps])
+                                        translate([0, offset])
                                             square([r, len]);
 
                                         translate([0, bot_chamfer_h])

vitamins/axial.scad

@@ -0,0 +1,138 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+//! Axial components for PCBs.
+//
+include <../utils/core/core.scad>
+include <../utils/round.scad>
+
+module wire_link(d, l, h = 1, tail = 3) { //! Draw a wire jumper link.
+    r = d;
+    $fn = 32;
+
+    color("silver") {
+        for(side = [-1, 1]) {
+            translate([side * l / 2, 0, -tail])
+                cylinder(d = d, h = tail + h - r);
+
+            translate([side * (l / 2 - r), 0, h - r])
+                rotate([90, 0, side * 90 - 90])
+                    rotate_extrude(angle = 90)
+                        translate([r, 0])
+                            circle(d = d);
+        }
+
+        translate_z(h)
+            rotate([0, 90, 0])
+                cylinder(d = d, h = l - 2 * r, center = true);
+    }
+}
+
+function ax_res_wattage(type) = type[1]; //! Power rating
+function ax_res_length(type)  = type[2]; //! Body length
+function ax_res_diameter(type)= type[3]; //! Body diameter
+function ax_res_end_d(type)   = type[4]; //! End cap diameter
+function ax_res_end_l(type)   = type[5]; //! End cap length
+function ax_res_wire(type)    = type[6]; //! Wire diameter
+function ax_res_colour(type)  = type[7]; //! Body colour
+
+module orientate_axial(length, height, pitch, wire_d) { // Orient horizontal or vertical and add the wires
+    min_pitch = ceil((length + 1) / inch(0.1)) * inch(0.1);
+    lead_pitch = pitch ? pitch : min_pitch;
+    if(lead_pitch >= min_pitch) {
+        wire_link(wire_d, lead_pitch, height);
+        translate_z(height)
+            rotate([0, 90, 0])
+                children();
+    }
+    else {
+        wire_link(wire_d, lead_pitch, length + 0.7 + wire_d);
+
+        translate([-pitch / 2, 0, length / 2 + 0.2])
+            children();
+   }
+}
+
+module ax_res(type, value, tol = 5, pitch = 0) { //! Through hole axial resistor. If ```pitch``` is zero the minimum is used. If below the minimum the resistor is placed vertical.
+    vitamin(str("ax_res(", type[0], ", ", value, arg(tol, 5, "tol"), "): Resistor ", value, " Ohms ", tol, "% ",ax_res_wattage(type), "W"));
+
+    wire_d =  ax_res_wire(type);
+    end_d = ax_res_end_d(type);
+    end_l = ax_res_end_l(type);
+    body_d = ax_res_diameter(type);
+    length = ax_res_length(type);
+    h = end_d / 2;
+    $fn = 32;
+    r = 0.3;
+
+    colours = ["gold", "silver", "black", "brown", "red", "orange", "yellow", "green", "blue", "violet", "grey", "white"];
+
+    exp = floor(log(value) + eps);
+    mult = exp - (len(str(value / pow(10, exp - 1))) > 2 ? 2 : 1);
+    digits = str(value / pow(10, mult));
+    bands = [
+        for(d = digits)
+            colours[ord(d) - ord("0") + 2],
+        colours[mult + 2],
+        tol == 1  ? "brown"  :
+        tol == 2  ? "red"    :
+        tol == 5  ? "gold"   :
+        tol == 10 ? "silver" : "error"
+    ];
+
+    module profile(o = 0)
+        intersection() {
+            offset(o) round(r)
+                union(){
+                    translate([0, -length / 2])
+                        square([body_d / 2, length]);
+
+                    for(end = [-1, 1])
+                        hull() {
+                            translate([0, end * (length - end_l) / 2 - end_l / 2])
+                                square([end_d / 2, end_l]);
+
+                            translate([0, end * length / 2])
+                                square([wire_d, 2 * r], center = true);
+                        }
+                    translate([-5, 0])
+                        square([10 + wire_d, length + 4 * r], center = true);
+                }
+
+            translate([0, -50])
+                square([50, 100]);
+    }
+
+    orientate_axial(length, h, pitch, wire_d) {
+        color(ax_res_colour(type))
+            rotate_extrude()
+                profile();
+
+        for(i = [0 : len(bands) - 1])
+            color(bands[i])
+                rotate_extrude()
+                    intersection() {
+                        profile(eps);
+
+                        translate([0, length / 2 - end_l / 2 - i * (length - end_l) / (len(bands) - 1)])
+                            square([end_d + 1, (length - end_l) / len(bands) / 2], center = true);
+                    }
+    }
+}

vitamins/axials.scad

@@ -0,0 +1,30 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+//! Axial components
+//
+
+res1_8 = ["res1_8", 0.125, 3.3, 1.35, 1.7, 1,   0.33, "#FAE3AC"];
+res1_4 = ["res1_4", 0.25,  5.7, 1.85, 2.3, 1.5, 0.55, "#FAE3AC"];
+res1_2 = ["res1_2", 0.5,  10,   3.25, 3.7, 1.8, 0.70, "#FAE3AC"];
+
+ax_resistors = [res1_8, res1_4, res1_2];
+
+use <axial.scad>

vitamins/ball_bearing.scad

@@ -26,36 +26,51 @@
 //! Also single bearing balls are modelled as just a silver sphere and a BOM entry.
 //
 include <../utils/core/core.scad>
+include <../utils/tube.scad>
 
 function bb_name(type)     = type[0]; //! Part code without shield type suffix
 function bb_bore(type)     = type[1]; //! Internal diameter
 function bb_diameter(type) = type[2]; //! External diameter
 function bb_width(type)    = type[3]; //! Width
 function bb_colour(type)   = type[4]; //! Shield colour, "silver" for metal
-function bb_rim(type)      = bb_diameter(type) / 10;  //! Inner and outer rim thickness
+function bb_rim(type)      = type[5]; //! Outer rim thickness guesstimate
+function bb_hub(type)      = type[6]; //! Inner rim thickness guesstimate
 
 module ball_bearing(type) { //! Draw a ball bearing
     shield = bb_colour(type);
     suffix = shield == "silver" ? "ZZ " : "-2RS ";
     vitamin(str("ball_bearing(BB", bb_name(type), "): Ball bearing ", bb_name(type), suffix, bb_bore(type), "mm x ", bb_diameter(type), "mm x ", bb_width(type), "mm"));
     rim = bb_rim(type);
+    hub = bb_hub(type);
     h = bb_width(type);
-    od = bb_diameter(type);
-    id = bb_bore(type);
-
-    module tube(od, id, h)
-        linear_extrude(h, center = true, convexity = 5)
-            difference() {
-                circle(d = od);
-                circle(d = id);
-            }
+    or = bb_diameter(type) / 2;
+    ir = bb_bore(type) / 2;
 
     color("silver") {
-        tube(od, od - rim, h);
-        tube(id + rim, id, h);
+        $fn = 360;
+
+        rim_chamfer = rim / 6;
+        rotate_extrude()
+            hull() {
+                translate([or - rim, -h / 2 + rim_chamfer])
+                    square([rim, h - 2 * rim_chamfer]);
+
+                translate([or - rim, -h / 2])
+                    square([rim - rim_chamfer, h]);
+            }
+
+        hub_chamfer = hub / 6;
+        rotate_extrude()
+            hull() {
+                translate([ir, -h / 2 + hub_chamfer])
+                    square([hub, h - 2 * hub_chamfer]);
+
+                translate([ir + hub_chamfer, -h / 2])
+                    square([hub - hub_chamfer, h]);
+            }
     }
 
-    color(shield) tube(od - rim, id + rim, h - 1);
+    color(shield) tube(or - rim - eps, ir + hub + eps, h - 1);
 
     if($children)
         translate_z(bb_width(type) / 2)

vitamins/ball_bearings.scad

@@ -16,11 +16,12 @@
 // You should have received a copy of the GNU General Public License along with NopSCADlib.
 // If not, see <https://www.gnu.org/licenses/>.
 //
-BB624 = ["624", 4, 13, 5, "blue"];      // 624 ball bearing for idlers
-BB608 = ["608", 8, 22, 7, "OrangeRed"]; // 608 bearings for wades
-BB6200 = ["6200", 10, 30, 9, "black"];  // 6200 bearings for KP pillow blocks
-BB6201 = ["6201", 12, 32, 10, "black"]; // 6201 bearings for KP pillow blocks
-
-ball_bearings = [BB624, BB608, BB6200, BB6201];
+BBSMR95 =  ["SMR95", 5,  9,  2.5, "silver",    0.5, 0.7];  // SMR95 ball bearing for FlexDrive extruder
+BB624   =  ["624",   4,  13, 5,   "blue",      1.2, 1.2];  // 624 ball bearing for idlers
+BB608   =  ["608",   8,  22, 7,   "OrangeRed", 1.4, 2.0];  // 608 bearings for wades
+BB6200   = ["6200",  10, 30, 9,   "black",     2.3, 3.6];  // 6200 bearings for KP pillow blocks
+BB6201   = ["6201",  12, 32, 10,  "black",     2.4, 3.7];  // 6201 bearings for KP pillow blocks
+BB6808   = ["6808",  40, 52, 7,   "black",     1.5, 1.6];
+ball_bearings = [BBSMR95, BB624, BB608, BB6200, BB6201, BB6808];
 
 use <ball_bearing.scad>

vitamins/belt.scad

@@ -24,29 +24,33 @@
 //! To make the back of the belt run against a smooth pulley on the outside of the loop specify a negative pitch radius.
 //!
 //! By default the path is a closed loop but a gap length and position can be specified to make open loops.
+//! To draw the gap its XY position is specified by ```gap_pos```. ```gap_pos.z``` can be used to specify a rotation if the gap is not at the bottom of the loop.
 //!
 //! Individual teeth are not drawn, instead they are represented by a lighter colour.
 //
 include <../utils/core/core.scad>
 use <../utils/rounded_polygon.scad>
+use <../utils/maths.scad>
 
 function belt_pitch(type)        = type[1]; //! Pitch in mm
 function belt_width(type)        = type[2]; //! Width in mm
 function belt_thickness(type)    = type[3]; //! Total thickness including teeth
 function belt_tooth_height(type) = type[4]; //! Tooth height
-function belt_pitch_height(type) = belt_tooth_height(type) + type[4]; //! Offset of the pitch radius from the tips of the teeth
+function belt_pitch_height(type) = type[5] + belt_tooth_height(type); //! Offset of the pitch radius from the tips of the teeth
+
+function belt_pitch_to_back(type) = belt_thickness(type) - belt_pitch_height(type); //! Offset of the back from the pitch radius
 
 function no_point(str) = chr([for(c = str) if(c == ".") ord("p") else ord(c)]);
 //
 // We model the belt path at the pitch radius of the pulleys and the pitch line of the belt to get an accurate length.
 // The belt is then drawn by offseting each side from the pitch line.
 //
-module belt(type, points, gap = 0, gap_pt = undef, belt_colour = grey20, tooth_colour = grey50) { //! Draw a belt path given a set of points and pitch radii where the pulleys are. Closed loop unless a gap is specified
+module belt(type, points, gap = 0, gap_pos = undef, belt_colour = grey(20), tooth_colour = grey(50)) { //! Draw a belt path given a set of points and pitch radii where the pulleys are. Closed loop unless a gap is specified
     width = belt_width(type);
     pitch = belt_pitch(type);
     thickness = belt_thickness(type);
     part = str(type[0],pitch);
-    vitamin(str("belt(", no_point(part), "x", width, ", ", points, arg(gap, 0), arg(gap_pt, undef), "): Belt ", part," x ", width, "mm x ", length, "mm"));
+    vitamin(str("belt(", no_point(part), "x", width, ", ", points, arg(gap, 0), arg(gap_pos, undef), "): Belt ", part," x ", width, "mm x ", length, "mm"));
 
     len = len(points);
 
@@ -56,24 +60,28 @@ module belt(type, points, gap = 0, gap_pt = undef, belt_colour = grey20, tooth_c
 
     module shape() rounded_polygon(points, tangents);
 
+    ph = belt_pitch_height(type);
+    th = belt_tooth_height(type);
     module gap()
         if(gap)
-            translate(gap_pt)
-                square([gap, thickness + eps], center = true);
+            translate([gap_pos.x, gap_pos.y])
+                rotate(is_undef(gap_pos.z) ? 0 : gap_pos.z)
+                    translate([0, ph - thickness / 2])
+                        square([gap, thickness + eps], center = true);
 
     color(belt_colour)
         linear_extrude(width, center = true)
             difference() {
-                offset(thickness - belt_pitch_height(type)) shape();
-                offset(-belt_pitch_height(type) + belt_tooth_height(type)) shape();
+                offset(-ph + thickness ) shape();
+                offset(-ph + th) shape();
                 gap();
-
             }
+
     color(tooth_colour)
         linear_extrude(width, center = true)
             difference() {
-                offset(-belt_pitch_height(type) + belt_tooth_height(type)) shape();
-                offset(-belt_pitch_height(type)) shape();
+                offset(-ph + th) shape();
+                offset(-ph) shape();
                 gap();
             }
 }

vitamins/blower.scad

@@ -39,7 +39,7 @@ function blower_top(type)         = type[14]; //! Thickness of the top
 function blower_wall(type)        = type[15]; //! Side wall thickness
 function blower_lug(type)         = type[16]; //! Height of the lugs
 
-fan_colour = grey20;
+fan_colour = grey(20);
 
 module blower(type) { //! Draw specified blower
     length = blower_length(type);

vitamins/button.scad

@@ -46,7 +46,7 @@ module square_button(type, colour = "yellow") { //! Draw square button with spec
     pitch = (w/ 2 - wall - rivit * 0.75);
     stem = square_button_cap_stem(type);
 
-    color(grey20) {
+    color(grey(20)) {
         rounded_rectangle([w, w, h - 0.5], r = wall, center = false);
 
         for(x = [-1, 1], y = [-1, 1])

vitamins/camera.scad

@@ -0,0 +1,89 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+
+//
+//! PCB cameras.
+//
+include <../utils/core/core.scad>
+use <pcb.scad>
+
+function camera_pcb(type)           = type[2]; //! The PCB part of the camera
+function camera_lens_offset(type)   = type[3]; //! Offset of the lens center from the PCB centre
+function camera_lens(type)          = type[4]; //! Stack of lens parts, can be round, rectanular or rounded rectangular, with optional tapered aperture
+function camera_connector_pos(type) = type[5]; //! The flex connector block for the camera itself's position
+function camera_connector_size(type)= type[6]; //! The flex connector block for the camera itself's size
+
+module camera_lens(type, offset = 0) //! Draw the lens stack, with optional offset for making a clearance hole
+    color(grey(20))
+        translate(camera_lens_offset(type))
+            for(p = camera_lens(type)) {
+                size = p[0];
+                r = p[1] + offset;
+                app = p[2];
+                if(size.x)
+                    rounded_rectangle(size + [2 * offset, 2 * offset, round_to_layer(offset)], r, center = false);
+                else
+                    translate_z(size.y)
+                        rotate_extrude()
+                            difference() {
+                                square([r, size.z + round_to_layer(offset)]);
+
+                                if(app)
+                                    translate([0, size.z])
+                                        hull() {
+                                            translate([0, -eps])
+                                                square([app.y, eps * 2]);
+
+                                            translate([0, -app.z])
+                                                square([app.x, app.z]);
+                                        }
+                            }
+            }
+
+module camera(type) {           //! Draw specified PCB camera
+    vitamin(str("camera(", type[0], "): ", type[1]));
+    pcb = camera_pcb(type);
+
+    not_on_bom()
+        pcb(pcb);
+
+    translate_z(pcb_thickness(pcb)) {
+        camera_lens(type);
+
+        conn = camera_connector_size(type);
+        if(conn) {
+            pos = camera_connector_pos(type);
+            color(grey(20))
+                translate(pos)
+                    rounded_rectangle(conn, 0.5, center = false);
+
+            flex = [5, 0.1];
+            color("orange")
+                hull() {
+                    translate_z(flex.y /2)
+                        translate(camera_lens_offset(type) + [0, camera_lens(type)[0][0].y / 2])
+                            cube([flex.x, eps, flex.y], center = true);
+
+                    translate_z(conn.z - flex.y)
+                        translate([camera_lens_offset(type).x, pos.y] - [0, conn.y / 2])
+                             cube([flex.x, eps, flex.y], center = true);
+                }
+        }
+    }
+}

vitamins/cameras.scad

@@ -0,0 +1,73 @@
+//
+// NopSCADlib Copyright Chris Palmer 2020
+// nop.head@gmail.com
+// hydraraptor.blogspot.com
+//
+// This file is part of NopSCADlib.
+//
+// NopSCADlib is free software: you can redistribute it and/or modify it under the terms of the
+// GNU General Public License as published by the Free Software Foundation, either version 3 of
+// the License, or (at your option) any later version.
+//
+// NopSCADlib is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
+// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+// See the GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License along with NopSCADlib.
+// If not, see <https://www.gnu.org/licenses/>.
+//
+include <smds.scad>
+
+rpi_camera_v1_pcb = ["", "",  25, 24, 1, 0, 2.1, 0, "green", false, [[2, -2], [-2, -2], [2, 9.6], [-2, 9.6]],
+    [
+        [12,   3.25,  0, "-flat_flex", true],
+        [-4.5, -5,    0, "smd_led", LED0603, "red"],
+        [-5.5, -4,    0, "smd_res", RES0603, "1K2"],
+    ],
+    []];
+
+rpi_camera_v1 = ["rpi_camera_v1", "Raspberry Pi camera V1", rpi_camera_v1_pcb, [0, 9.6 - 12],
+    [
+        [[8, 8, 3], 0],
+        [[0, 0, 4], 7.5 / 2],
+        [[0, 0, 5], 5.5 / 2, [1.5/2, 2/2, 0.5]],
+    ],
+    [0, 12 - 1.5 - 2.5], [8, 5, 1]
+];
+
+rpi_camera_v2_pcb = ["", "",  25, 23.862, 1, 2, 2.2, 0, "green", false, [[2, -2], [-2, -2], [2, -14.5], [-2, -14.5]],
+    [
+        [12.5,   2.75,  0, "-flat_flex", true],
+    ],
+    []];
+
+rpi_camera_v2 = ["rpi_camera_v2", "Raspberry Pi camera V2", rpi_camera_v2_pcb, [0, 9.6 - 12],
+    [
+        [[8.5, 8.5, 3], 0],
+        [[0, 0, 4], 7.5 / 2],
+        [[0, 0, 5], 5.5 / 2, [1.5/2, 2/2, 0.5]],
+    ],
+    [-13.8 + 12.5, 23.862 / 2 - 4.7], [8.5, 4, 1]
+];
+
+rpi_camera_pcb = ["", "",  36, 36, 1.6, 0, 3.2, 0, "green", false, [[3.5, -3.5], [-3.5, -3.5], [3.5, 3.5], [-3.5, 3.5]],
+    [
+        [18,    4.25,  0, "-flat_flex", true],
+        [-3.8, -7.8,  0, "smd_led", LED0805, "red"],
+    ],
+    []];
+
+rpi_camera = ["rpi_camera", "Raspberry Pi focusable camera", rpi_camera_pcb, [0, 0],
+    [
+        [[13, 13, 3], 0],
+        [[22,  4, 3], 2 - eps],
+        [[0, 0, 8.5], 7],
+        [[0, 0,  12], 6],
+        [[0, 11, 4.3], 14 / 2, [8/2, 11/2, 1]],
+    ],
+    [0, 18 - 1.5 - 2.5], [8, 5, 1.6]
+];
+
+cameras = [rpi_camera_v1, rpi_camera, rpi_camera_v2];
+
+use <camera.scad>

vitamins/circlip.scad

@@ -33,7 +33,7 @@ function circlip_a(type)         = type[5];     //! Size of the lugs
 function circlip_b(type)         = type[6];     //! Widest part of the taper
 function circlip_d5(type)        = type[7];     //! Plier hole diameter
 
-circlip_colour = grey20;
+circlip_colour = grey(20);
 closed_angle = 25;
 
 module internal_circlip(type, open = 0) { //! Draw specified internal circlip, open = 0, for nominal size installed, 1 for relaxed uninstalled, -1 for squeezed to install

vitamins/component.scad

@@ -28,6 +28,7 @@ include <../core.scad>
 include <tubings.scad>
 include <spades.scad>
 use <../utils/rounded_cylinder.scad>
+use <../utils/dogbones.scad>
 
 function resistor_length(type)        = type[2]; //! Body length
 function resistor_diameter(type)      = type[3]; //! Body diameter
@@ -447,3 +448,75 @@ module thermal_cutout(type) { //! Draw specified thermal cutout
         thermal_cutout_hole_positions(type)
             children();
 }
+
+function fack2spm_bezel_size() = [19.2, 35.5, 2.6, 2]; //! FACK2SPM Bezel dimensions
+
+module fack2spm_hole_positions() //! Place children at the FACK2SPM mounting hole positions
+    for(end = [-1, 1])
+        translate([0, end * 28.96 / 2])
+            children();
+
+function fack2spm_screw() = M3_dome_screw; //! Screw type for FACK2SPM
+
+module fack2spm_holes(h = 0) { //! Cut the holes for a FACK2SPM
+    fack2spm_hole_positions()
+        drill(screw_clearance_radius(fack2spm_screw()), h);
+
+    dogbone_rectangle([17.15, 22.86, h]);
+}
+
+module fack2spm() { //! Draw a FACK2SPM Cat5E RJ45 shielded panel mount coupler
+    vitamin("tuk_fack2spm(): TUK FACK2SPM Cat5E RJ45 shielded panel mount coupler");
+
+    bezel = fack2spm_bezel_size();
+    body   = [16.8, 22.8, 9.8];
+    socket = [14.5, 16.1, 29.6];
+    y_offset = -(19.45 - 16.3) / 2;
+    plug = [12, 6.8, 10];
+    plug_y = y_offset - socket.y / 2 + 4 + plug.y / 2;
+    tab1 = [4, 3];
+    tab2 = [6.3, 1.6];
+
+    module socket()
+        translate([0, y_offset])
+            square([socket.x, socket.y], center = true);
+
+    color("silver") {
+        linear_extrude(bezel.z)
+            difference() {
+                rounded_square([bezel.x, bezel.y], bezel[3]);
+
+                fack2spm_hole_positions()
+                    circle(d = 3.15);
+
+                socket();
+            }
+
+        translate_z(bezel.z - body.z)
+            linear_extrude(body.z - eps)
+                difference() {
+                    square([body.x, body.y], center = true);
+
+                    socket();
+                }
+
+        translate_z(bezel.z - socket.z)
+            linear_extrude(socket.z - 0.1)
+                difference() {
+                    offset(-0.1) socket();
+
+                    translate([0, plug_y]) {
+                        square([plug.x, plug.y], center = true);
+
+                        translate([0, -plug.y / 2]) {
+                            square([tab1.x, 2 * tab1.y], center = true);
+
+                            square([tab2.x, 2 * tab2.y], center = true);
+                        }
+                    }
+                }
+
+        translate([0, plug_y, -socket.z / 2])
+            cube([plug.x, plug.y, socket.z - 2 * plug.z], center = true);
+    }
+}

vitamins/d_connector.scad

@@ -23,9 +23,9 @@
 include <../utils/core/core.scad>
 use <../utils/thread.scad>
 
-d_pillar_colour                   = grey90;
-d_plug_shell_colour               = grey80;
-d_plug_insulator_colour           = grey20;
+d_pillar_colour                   = grey(90);
+d_plug_shell_colour               = grey(80);
+d_plug_insulator_colour           = grey(20);
 
 function  d_flange_length(type)    = type[1];   //! Length of the flange
 function  d_lengths(type)          = type[2];   //! Lengths of the D for plug and socket