Added parametric printed hinges.

libtest.scad

@@ -88,6 +88,7 @@ use <tests/socket_box.scad>
 use <tests/strap_handle.scad>
 use <tests/ssr_shroud.scad>
 use <tests/psu_shroud.scad>
+use <tests/flat_hinge.scad>
 
 x5 = 800;
 
@@ -114,6 +115,9 @@ translate([x5 + 70, cable_grommets_y + 150])
 translate([x5, cable_grommets_y + 470]) {
     door_hinges()
         door_latches();
+
+    translate([120, 0])
+        flat_hinges();
 }
 
 translate([x5, cable_grommets_y + 370])

printed/butt_box.scad

@@ -97,7 +97,7 @@ function fixing_block_positions(type) = let(
 
         for(i = [0 : 1 : hspans - 1], x = [-1, 1], y = [-1, 1])
             translate([x * width / 2, y * depth / 2, (i - (hspans - 1) / 2) * hspan]) *
-            rotate([y > 0 ? 180 : 0, x * y * 90]),
+            rotate([y > 0 ? 180 : 0, x * y * 90, 0]),
 
     ];
 

printed/flat_hinge.scad

@@ -0,0 +1,180 @@
+//
+// 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/>.
+//
+
+//
+//! A parametric flat hinge. A piece of filament can be used for the hinge pin.
+//!
+//! The width, depth, thickness, number and type of screws, number of knuckles, knuckle diameter, pin diameter and clearance can all be varied.
+//! A margin between the screws and the knuckle edge can be enforced to allow the hinge to bend all the way back to 270&deg; from closed.
+//!
+//! Opening the test in OpenSCAD with its customiser enabled allows these parameters to be played with.
+//!
+//! Note setting ```thickness1``` or ```thickness2``` to zero in the ```hinge_fastened_assembly()``` removes the screws from one side or the other and
+//! setting ```show_hinge``` to false removes the hinge.
+//! This allows the hinges and one set of screws to belong to one assembly and the other set of screws to another assembly.
+//
+include <../core.scad>
+include <../vitamins/screws.scad>
+
+function hinge_width(type)       = type[1]; //! Width
+function hinge_depth(type)       = type[2]; //! Depth of each leaf
+function hinge_thickness(type)   = type[3]; //! Thickness of the leaves
+function hinge_pin_dia(type)     = type[4]; //! The pin diameter
+function hinge_knuckle_dia(type) = type[5]; //! The knuckle diameter
+function hinge_knuckles(type)    = type[6]; //! How many knuckles
+function hinge_screw(type)       = type[7]; //! Screw type to mount it
+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 hinge_radius(type)      = washer_radius(screw_washer(hinge_screw(type))) + 1;
+
+module hinge_screw_positions(type) { //! Place children at the screw positions
+    screws = hinge_screws(type);
+    w = hinge_width(type);
+    d = hinge_depth(type);
+    r = hinge_radius(type);
+    m = hinge_margin(type);
+    assert(screws > 1, "must be at least two screws");
+    w_pitch = (w - 2 * r) / (screws - 1);
+    d_pitch = d - 2 * r - m;
+    wr = washer_radius(screw_washer(hinge_screw(type)));
+    assert(w_pitch >= wr && norm([w_pitch, d_pitch]) >= 2 * wr && d_pitch >= 0, "not enough room for screws");
+
+    for(i = [0 : screws - 1])
+        translate([-w / 2 + r + i * w_pitch, r + m + (i % 2) * d_pitch])
+            children();
+}
+
+module hinge_male(type, female = false) {       //! The half with the stationary pin
+    stl(str("hinge_", female ? "fe": "", "male_", type[0]));
+
+    r = hinge_radius(type);
+    w = hinge_width(type);
+    t = hinge_thickness(type);
+    kr = hinge_knuckle_dia(type) / 2;
+    pr = hinge_pin_dia(type) / 2;
+    assert(kr > pr, "knuckle diameter must be bigger than the pin diameter");
+
+    n = hinge_knuckles(type);
+    assert(n >= 3, "must be at least three knuckes");
+    mn = ceil(n / 2);                           // Male knuckles
+    fn = floor(n / 2);                          // Female knuckles
+    gap = hinge_clearance(type);
+    mw = (w - (n - 1) * gap) / 2 / mn;          // Male knuckle width
+    fw = (w - (n - 1) * gap) / 2 / fn;          // Female knuckle width
+
+    teardrop_r = kr / cos(22.5);                // The corner on the teardrop
+    inset = sqrt(sqr(teardrop_r + gap) - sqr(kr - t)) - kr;
+
+    linear_extrude(height =t)
+        difference() {
+            hull() {
+                for(side = [-1, 1])
+                    translate([side * (w / 2 - r), hinge_depth(type) - r])
+                        circle4n(r);
+
+                translate([-w / 2, inset])
+                    square([w, eps]);
+            }
+            hinge_screw_positions(type)
+                poly_circle(screw_clearance_radius(hinge_screw(type)));
+        }
+
+    pitch = mw + gap + fw + gap;
+    dir = female ? -1 : 1;
+    translate([0, -kr, kr])
+        rotate([90, 0, -90])
+            for(z = [0 : (female ? fn : mn) - 1])
+                translate_z(-dir * w / 2 + z * dir * pitch + (female ? -fw - mw - gap : 0))
+                    linear_extrude(height = female ? fw : mw)
+                        difference() {
+                            hull() {
+                                rotate(180)
+                                    teardrop(r = kr, h = 0);
+
+                                translate([-kr - 1, -kr])
+                                    square(1);
+                            }
+                            teardrop_plus(r = pr + (female ? gap : 0), h = 0);
+                        }
+}
+
+module hinge_female(type) hinge_male(type, true);
+
+module hinge_both(type) { //! Both parts together for printing
+    hinge_male(type);
+
+    translate([0, -hinge_knuckle_dia(type)])
+        rotate(180)
+             hinge_female(type);
+}
+
+module hinge_assembly(type, angle = 0)
+assembly(str("hinge_", type[0])) { //! Assembled hinge
+    kr = hinge_knuckle_dia(type) / 2;
+    hr = hinge_pin_dia(type) / 2;
+    w = hinge_width(type);
+
+    vitamin(str(": Hinge pin ", w, " x ", 2 * hr, "mm"));
+
+    color(pp1_colour) hinge_male(type);
+
+    translate([0, -kr, kr]) {
+        rotate([0, 90, 0])
+            explode(w + 10)
+                color("silver") cylinder(r = hr , h = w, center = true);
+
+        rotate([-angle, 0, 0])
+            translate([0, -kr, -kr])
+                rotate(180)
+                     color(pp2_colour) hinge_female(type);
+    }
+}
+
+module hinge_fastened_assembly(type, thickness1, thickness2, angle, show_hinge = true) { //! Assembled hinge with its fasteners
+    if(show_hinge)
+        hinge_assembly(type, angle);
+
+    screw = hinge_screw(type);
+    washer_t = 2 * washer_thickness(screw_washer(screw));
+    nut = screw_nut(screw);
+    nut_t = nut_thickness(nut, true);
+    t = hinge_thickness(type);
+    kr = hinge_knuckle_dia(type) / 2;
+
+    module fasteners(thickness)
+        if(thickness)
+            hinge_screw_positions(type) {
+                translate_z(t)
+                    screw_and_washer(screw, screw_longer_than(t + thickness + washer_t + nut_t));
+
+                translate_z(-thickness)
+                    vflip()
+                        nut_and_washer(nut, true);
+            }
+
+    fasteners(thickness1);
+
+    translate([0, -kr, kr])
+        rotate([-angle, 0, 0])
+            translate([0, -kr, - kr])
+                rotate(180)
+                     fasteners(thickness2);
+}

readme.md

@@ -27,15 +27,15 @@ See [usage](docs/usage.md) for requirements, installation instructions and a usa
 <tr><td> <a href = "#Cable_strips">Cable_strips</a> </td><td> <a href = "#Pulleys">Pulleys</a> </td><td> <a href = "#Door_latch">Door_latch</a> </td><td> <a href = "#Maths">Maths</a> </td><td> <a href = "#Teardrops">Teardrops</a> </td></tr>
 <tr><td> <a href = "#Components">Components</a> </td><td> <a href = "#Rails">Rails</a> </td><td> <a href = "#Fan_guard">Fan_guard</a> </td><td> <a href = "#Offset">Offset</a> </td><td></td></tr>
 <tr><td> <a href = "#Displays">Displays</a> </td><td> <a href = "#Ring_terminals">Ring_terminals</a> </td><td> <a href = "#Fixing_block">Fixing_block</a> </td><td> <a href = "#Quadrant">Quadrant</a> </td><td></td></tr>
-<tr><td> <a href = "#D_connectors">D_connectors</a> </td><td> <a href = "#Rockers">Rockers</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr>
-<tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#Rod">Rod</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
-<tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Psu_shroud">Psu_shroud</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
-<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr>
-<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
-<tr><td> <a href = "#Iecs">Iecs</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
-<tr><td> <a href = "#Inserts">Inserts</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#Ssr_shroud">Ssr_shroud</a> </td><td></td><td></td></tr>
-<tr><td> <a href = "#Jack">Jack</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
-<tr><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#Ssrs">Ssrs</a> </td><td></td><td></td><td></td></tr>
+<tr><td> <a href = "#D_connectors">D_connectors</a> </td><td> <a href = "#Rockers">Rockers</a> </td><td> <a href = "#Flat_hinge">Flat_hinge</a> </td><td> <a href = "#Round">Round</a> </td><td></td></tr>
+<tr><td> <a href = "#Fans">Fans</a> </td><td> <a href = "#Rod">Rod</a> </td><td> <a href = "#Foot">Foot</a> </td><td> <a href = "#Rounded_cylinder">Rounded_cylinder</a> </td><td></td></tr>
+<tr><td> <a href = "#Fuseholder">Fuseholder</a> </td><td> <a href = "#Screws">Screws</a> </td><td> <a href = "#Handle">Handle</a> </td><td> <a href = "#Rounded_polygon">Rounded_polygon</a> </td><td></td></tr>
+<tr><td> <a href = "#Green_terminals">Green_terminals</a> </td><td> <a href = "#Sealing_strip">Sealing_strip</a> </td><td> <a href = "#Psu_shroud">Psu_shroud</a> </td><td> <a href = "#Sector">Sector</a> </td><td></td></tr>
+<tr><td> <a href = "#Hot_ends">Hot_ends</a> </td><td> <a href = "#Sheets">Sheets</a> </td><td> <a href = "#Ribbon_clamp">Ribbon_clamp</a> </td><td> <a href = "#Sweep">Sweep</a> </td><td></td></tr>
+<tr><td> <a href = "#Iecs">Iecs</a> </td><td> <a href = "#Spades">Spades</a> </td><td> <a href = "#Screw_knob">Screw_knob</a> </td><td> <a href = "#Tube">Tube</a> </td><td></td></tr>
+<tr><td> <a href = "#Inserts">Inserts</a> </td><td> <a href = "#Spools">Spools</a> </td><td> <a href = "#Socket_box">Socket_box</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#Jack">Jack</a> </td><td> <a href = "#Springs">Springs</a> </td><td> <a href = "#Ssr_shroud">Ssr_shroud</a> </td><td></td><td></td></tr>
+<tr><td> <a href = "#Leadnuts">Leadnuts</a> </td><td> <a href = "#Ssrs">Ssrs</a> </td><td> <a href = "#Strap_handle">Strap_handle</a> </td><td></td><td></td></tr>
 <tr><td> <a href = "#Leds">Leds</a> </td><td> <a href = "#Stepper_motors">Stepper_motors</a> </td><td></td><td></td><td></td></tr>
 <tr><td> <a href = "#Light_strips">Light_strips</a> </td><td> <a href = "#Toggles">Toggles</a> </td><td></td><td></td><td></td></tr>
 <tr><td> <a href = "#Linear_bearings">Linear_bearings</a> </td><td> <a href = "#Transformers">Transformers</a> </td><td></td><td></td><td></td></tr>
@@ -521,6 +521,7 @@ LCD dispays.
 | ---:|:--- |:---|
 |   1 | ```display(HDMI5)``` |  HDMI display 5" |
 |   1 | ```display(LCD1602A)``` |  LCD display 1602A |
+|   1 | ```display(SSD1963_4p3)``` |  LCD display SSD1963 4.3" |
 
 
 <a href="#top">Top</a>
@@ -3474,6 +3475,76 @@ Note that the block with its inserts is defined as a sub assembly, but its faste
 |   1 | fixing_block_M40_assembly |
 
 
+<a href="#top">Top</a>
+
+---
+<a name="Flat_hinge"></a>
+## Flat_hinge
+A parametric flat hinge. A piece of filament can be used for the hinge pin.
+
+The width, depth, thickness, number and type of screws, number of knuckles, knuckle diameter, pin diameter and clearance can all be varied.
+A margin between the screws and the knuckle edge can be enforced to allow the hinge to bend all the way back to 270&deg; from closed.
+
+Opening the test in OpenSCAD with its customiser enabled allows these parameters to be played with.
+
+Note setting ```thickness1``` or ```thickness2``` to zero in the ```hinge_fastened_assembly()``` removes the screws from one side or the other and
+setting ```show_hinge``` to false removes the hinge.
+This allows the hinges and one set of screws to belong to one assembly and the other set of screws to another assembly.
+
+
+[printed/flat_hinge.scad](printed/flat_hinge.scad) Implementation.
+
+[tests/flat_hinge.scad](tests/flat_hinge.scad) Code for this example.
+
+### Properties
+| Function | Description |
+|:--- |:--- |
+| ```hinge_clearance(type)``` | Clearance between knuckles |
+| ```hinge_depth(type)``` | Depth of each leaf |
+| ```hinge_knuckle_dia(type)``` | The knuckle diameter |
+| ```hinge_knuckles(type)``` | How many knuckles |
+| ```hinge_margin(type)``` | How far to keep the screws from the knuckes |
+| ```hinge_pin_dia(type)``` | The pin diameter |
+| ```hinge_screw(type)``` | Screw type to mount it |
+| ```hinge_screws(type)``` | How many screws |
+| ```hinge_thickness(type)``` | Thickness of the leaves |
+| ```hinge_width(type)``` | Width |
+
+### Modules
+| Module | Description |
+|:--- |:--- |
+| ```hinge_both(type)``` | Both parts together for printing |
+| ```hinge_fastened_assembly(type, thickness1, thickness2, angle, show_hinge = true)``` | Assembled hinge with its fasteners |
+| ```hinge_male(type, female = false)``` | The half with the stationary pin |
+| ```hinge_screw_positions(type)``` | Place children at the screw positions |
+
+![flat_hinge](tests/png/flat_hinge.png)
+
+### Vitamins
+| Qty | Module call | BOM entry |
+| ---:|:--- |:---|
+|   1 |  |  Hinge pin 20 x 2.85mm |
+|   1 |  |  Hinge pin 50 x 4mm |
+|  14 | ```nut(M3_nut, nyloc = true)``` |  Nut M3 x 2.4mm nyloc |
+|   4 | ```screw(M3_dome_screw, 10)``` |  Screw M3 dome x 10mm |
+|  10 | ```screw(M3_dome_screw, 12)``` |  Screw M3 dome x 12mm |
+|  28 | ```washer(M3_washer)``` |  Washer  M3 x 7mm x 0.5mm |
+
+### Printed
+| Qty | Filename |
+| ---:|:--- |
+|   1 | hinge_female_big.stl |
+|   1 | hinge_female_small.stl |
+|   1 | hinge_male_big.stl |
+|   1 | hinge_male_small.stl |
+
+### Assemblies
+| Qty | Name |
+| ---:|:--- |
+|   1 | hinge_big_assembly |
+|   1 | hinge_small_assembly |
+
+
 <a href="#top">Top</a>
 
 ---
@@ -4112,7 +4183,7 @@ Square with one rounded corner.
 ---
 <a name="Round"></a>
 ## Round
-Round 2D shapes uisng `offset()`, which is fast and 3D shapes with [`offset_3D()`](#offset), which is very slow.
+Round 2D shapes using `offset()`, which is fast and 3D shapes with [`offset_3D()`](#offset), which is very slow.
 
 A single radius can be specified or separate internal and external radii.
 If `chamfer_base` is `true` for `round_3D()` then the bottom edge is made suitable for 3D printing by chamfering once the

tests/flat_hinge.scad

@@ -0,0 +1,48 @@
+//
+// 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 <../core.scad>
+include <../vitamins/screws.scad>
+use <../utils/layout.scad>
+use <../printed/flat_hinge.scad>
+
+width = 50; // [20 : 100]
+depth = 20; // [8  : 50]
+thickness = 4; //[1 : 10]
+screws = 5; // [1  : 20]
+knuckles = 5; // [3 : 10]
+pin_diameter = 4; // [1:  10]
+knuckle_diameter = 9; //[4 : 15]
+margin = 0; // [0 : 10]
+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];
+
+hinges = [small_hinge, big_hinge];
+
+module flat_hinges()
+    layout([for(h = hinges) hinge_width(h)], 10)
+        if($preview)
+            hinge_fastened_assembly(hinges[$i], 3, 3, angle);
+        else
+            hinge_male(hinges[$i]);
+
+flat_hinges();

utils/round.scad

@@ -17,7 +17,7 @@
 // If not, see <https://www.gnu.org/licenses/>.
 //
 
-//! Round 2D shapes uisng `offset()`, which is fast and 3D shapes with [`offset_3D()`](#offset), which is very slow.
+//! Round 2D shapes using `offset()`, which is fast and 3D shapes with [`offset_3D()`](#offset), which is very slow.
 //!
 //! A single radius can be specified or separate internal and external radii.
 //! If `chamfer_base` is `true` for `round_3D()` then the bottom edge is made suitable for 3D printing by chamfering once the

vitamins/displays.scad

@@ -47,6 +47,19 @@ LCD1602A = ["LCD1602A", "LCD display 1602A", 71.3, 24.3, 7.0, LCD1602APCB,
           [],                                       // clearance need for the ts ribbon
         ];
 
-displays = [LCD1602A, HDMI5];
+SSD1963_4p3PCB = ["", "", 120, 74, 1.65, 3, 3, 0, "mediumblue", false, [[3, 3], [-3, 3], [-3, -3], [3, -3]],
+    [ [2.75 + 1.27, 37, 90, "2p54header", 20, 2]
+    ],
+    []];
+
+SSD1963_4p3 = ["SSD1963_4p3", "LCD display SSD1963 4.3\"", 105.5, 67.2, 3.4, SSD1963_4p3PCB,
+        [0, 0, 0],
+        [[-50, -26.5], [50, 31.5, 0.5]],
+        [[-105.5 / 2, -65 / 2 + 1], [105.5 / 2, 65 / 2 + 1, 1]],
+        0,
+        [[0, -34.5], [12, -31.5]],
+        ];
+
+displays = [HDMI5, SSD1963_4p3, LCD1602A];
 
 use <display.scad>