diff --git a/libtest.png b/libtest.png
index 937eff5..54c1cd4 100644
Binary files a/libtest.png and b/libtest.png differ
diff --git a/libtest.scad b/libtest.scad
index f215de6..cda2a62 100644
--- a/libtest.scad
+++ b/libtest.scad
@@ -369,10 +369,10 @@ extrusions_y = panel_meters_y + 80;
translate([x3, veroboard_y])
veroboard_test();
-translate([x3 + 70, veroboard_y + 30])
+translate([x3 + 60, veroboard_y + 20])
geared_steppers();
-translate([x3 + 140, veroboard_y + 20])
+translate([x3 + 160, ssrs_y])
pcb_mounts();
translate([x3 + 170, veroboard_y + 16])
diff --git a/readme.md b/readme.md
index 85bc55c..4aac62d 100644
--- a/readme.md
+++ b/readme.md
@@ -1091,23 +1091,23 @@ Geared tin can steppers
|:--- |:--- |
| `gs_boss_d(type)` | Boss around the shaft diameter |
| `gs_boss_h(type)` | Boss around the shaft height |
-| `gs_bulge2_d(type)` | Plastic rear bulge depth from centre |
-| `gs_bulge2_h(type)` | Plastic rear bulge height |
-| `gs_bulge2_w(type)` | Plastic rear bulge width |
-| `gs_bulge_d(type)` | Plastic bulge depth from centre |
-| `gs_bulge_h(type)` | Plastic bulge height |
-| `gs_bulge_w(type)` | Plastic bulge width |
+| `gs_bulge(type)` | Plastic bulge width, depth, height, z offset |
+| `gs_bulge2(type)` | Plastic rear bulge width, depth, height |
| `gs_diameter(type)` | Can diameter |
| `gs_flat_length(type)` | Shaft flat length |
| `gs_height(type)` | Can height |
| `gs_hole_d(type)` | Screw hole diameter |
| `gs_lug_t(type)` | Screw lug thickness |
| `gs_lug_w(type)` | Screw lug width |
+| `gs_motor(type)` | Motor diameter and height if separate from gearbox |
| `gs_offset(type)` | Offset of the shaft from the centre of the can |
| `gs_pitch(type)` | Screw pitch |
+| `gs_radius(type)` | Top - or bottom + corner radius |
| `gs_shaft_d(type)` | Shaft diameter |
| `gs_shaft_flat(type)` | Shaft width across the flats |
| `gs_shaft_length(type)` | Shaft length |
+| `gs_wire_d(type)` | Wire diameter |
+| `gs_wires(type)` | Wire colours and grouping |
### Modules
| Module | Description |
@@ -1121,6 +1121,7 @@ Geared tin can steppers
| Qty | Module call | BOM entry |
| ---:|:--- |:---|
| 1 | `geared_stepper(28BYJ_48)` | Geared stepper - 28BYJ-48 5V |
+| 1 | `geared_stepper(35BYGHJ75)` | Geared stepper - 35BYGHJ75 0.4A |
Top
diff --git a/tests/geared_steppers.scad b/tests/geared_steppers.scad
index ba9ef57..0ce436a 100644
--- a/tests/geared_steppers.scad
+++ b/tests/geared_steppers.scad
@@ -21,7 +21,7 @@ include <../vitamins/geared_steppers.scad>
use <../utils/layout.scad>
module geared_steppers()
- layout([for(g = geared_steppers) gs_diameter(g)], 5)
+ layout([for(g = geared_steppers) max(gs_diameter(g), gs_pitch(g) + gs_lug_w(g) / 2)], 5)
geared_stepper(geared_steppers[$i]);
geared_steppers();
diff --git a/tests/png/geared_steppers.png b/tests/png/geared_steppers.png
index e2e3a46..05e57d6 100644
Binary files a/tests/png/geared_steppers.png and b/tests/png/geared_steppers.png differ
diff --git a/vitamins/geared_stepper.scad b/vitamins/geared_stepper.scad
index e736645..3f643ae 100644
--- a/vitamins/geared_stepper.scad
+++ b/vitamins/geared_stepper.scad
@@ -26,89 +26,138 @@ use <../utils/round.scad>
function gs_diameter(type) = type[2]; //! Can diameter
function gs_height(type) = type[3]; //! Can height
-function gs_pitch(type) = type[4]; //! Screw pitch
-function gs_lug_w(type) = type[5]; //! Screw lug width
-function gs_lug_t(type) = type[6]; //! Screw lug thickness
-function gs_hole_d(type) = type[7]; //! Screw hole diameter
-function gs_offset(type) = type[8]; //! Offset of the shaft from the centre of the can
-function gs_boss_d(type) = type[9]; //! Boss around the shaft diameter
-function gs_boss_h(type) = type[10]; //! Boss around the shaft height
-function gs_shaft_d(type) = type[11]; //! Shaft diameter
-function gs_shaft_flat(type) = type[12]; //! Shaft width across the flats
-function gs_shaft_length(type) = type[13]; //! Shaft length
-function gs_flat_length(type) = type[14]; //! Shaft flat length
-function gs_bulge_w(type) = type[15]; //! Plastic bulge width
-function gs_bulge_d(type) = type[16]; //! Plastic bulge depth from centre
-function gs_bulge_h(type) = type[17]; //! Plastic bulge height
-function gs_bulge2_w(type) = type[18]; //! Plastic rear bulge width
-function gs_bulge2_d(type) = type[19]; //! Plastic rear bulge depth from centre
-function gs_bulge2_h(type) = type[20]; //! Plastic rear bulge height
+function gs_radius(type) = type[4]; //! Top - or bottom + corner radius
+function gs_motor(type) = type[5]; //! Motor diameter and height if separate from gearbox
+function gs_pitch(type) = type[6]; //! Screw pitch
+function gs_lug_w(type) = type[7]; //! Screw lug width
+function gs_lug_t(type) = type[8]; //! Screw lug thickness
+function gs_hole_d(type) = type[9]; //! Screw hole diameter
+function gs_offset(type) = type[10]; //! Offset of the shaft from the centre of the can
+function gs_boss_d(type) = type[11]; //! Boss around the shaft diameter
+function gs_boss_h(type) = type[12]; //! Boss around the shaft height
+function gs_shaft_d(type) = type[13]; //! Shaft diameter
+function gs_shaft_flat(type) = type[14]; //! Shaft width across the flats
+function gs_shaft_length(type) = type[15]; //! Shaft length
+function gs_flat_length(type) = type[16]; //! Shaft flat length
+function gs_bulge(type) = type[17]; //! Plastic bulge width, depth, height, z offset
+function gs_bulge2(type) = type[18]; //! Plastic rear bulge width, depth, height
+function gs_wire_d(type) = type[19]; //! Wire diameter
+function gs_wires(type) = type[20]; //! Wire colours and grouping
module geared_stepper_screw_positions(type) //! Place children at the screw positions
for(side = [-1, 1])
translate([side * gs_pitch(type) / 2, -gs_offset(type)])
children();
+motor_colour = "#9BA2AC";
+gearbox_colour = "#FFF7EE";
+
module geared_stepper(type) { //! Draw the specified geared stepper
vitamin(str("geared_stepper(", type[0], "): Geared stepper - ", type[1]));
radius = gs_diameter(type) / 2;
- height = gs_height(type);
+ motor = gs_motor(type);
+ height = gs_height(type) - motor.y;
offset = gs_offset(type);
- color("silver") {
- translate([0, -offset])
- rounded_cylinder(r = radius, h = height, r2 = 1);
+ lug_t = gs_lug_t(type);
+ bulge = gs_bulge(type);
+ bulge_z = bulge[3];
+ bulge2 = gs_bulge2(type);
+ wires = gs_wires(type);
+
+ // Gearbox
+ color(motor.y ? gearbox_colour : motor_colour) {
+ difference() {
+ rad = gs_radius(type);
+ translate([0, -offset])
+ if(rad >= 0)
+ rounded_cylinder(r = radius, h = height, r2 = rad);
+ else
+ translate_z(height)
+ vflip()
+ rounded_cylinder(r = radius, h = height, r2 = -rad);
+
+ if(!lug_t)
+ geared_stepper_screw_positions(type)
+ cylinder(d = gs_hole_d(type), h = 10, center = true);
+ }
cylinder(d = gs_boss_d(type), h = 2 * gs_boss_h(type), center = true);
- linear_extrude(gs_lug_t(type))
- difference() {
- hull()
+ if(lug_t)
+ linear_extrude(lug_t)
+ difference() {
+ hull()
+ geared_stepper_screw_positions(type)
+ circle(d = gs_lug_w(type));
+
geared_stepper_screw_positions(type)
- circle(d = gs_lug_w(type));
+ circle(d = gs_hole_d(type));
+ }
- geared_stepper_screw_positions(type)
- circle(d = gs_hole_d(type));
- }
-
- translate([0, -offset - radius, eps])
- cube([gs_bulge_w(type) - 2, 2 * (gs_bulge_d(type) - radius) - 2, 2 * eps], center = true);
+ if(!bulge_z)
+ translate([0, -offset - radius, eps])
+ cube([bulge.x - 2, 2 * (bulge.y - radius) - 2, 2 * eps], center = true);
}
+
+ // Motor
+ if(motor.y)
+ color("#9BA2AC")
+ translate([0, -offset, height])
+ rotate_extrude()
+ union() {
+ r = motor.x / 2;
+ rad = motor[2];
+ square([r - rad, rad]);
+
+ translate([0, motor.y - rad])
+ square([r - rad, rad]);
+
+ hull()
+ for(y = [2 * rad, motor.y - 2 * rad])
+ translate([r - rad, y])
+ circle(rad);
+ }
+
+ // Shaft
+ f = gs_shaft_flat(type);
+ two_flats = f < 0;
vflip()
- color(brass) {
+ color(two_flats ? brass : gearbox_colour) {
d = gs_shaft_d(type);
h = gs_shaft_length(type);
linear_extrude(h)
intersection() {
circle(d = d);
- square([d + 1, gs_shaft_flat(type)], center = true);
+ translate([0, two_flats ? 0 : (f - d) / 2])
+ square([d + 1, abs(f)], center = true);
}
cylinder(d = d, h = h - gs_flat_length(type));
}
- color("skyblue") {
- h1 = gs_bulge_h(type);
- translate([0, - offset - radius, eps])
- rounded_rectangle([gs_bulge_w(type), 2 * (gs_bulge_d(type) - radius), h1], 0.5, center = false);
+ // Wire block
+ color(bulge_z ? "white" : "skyblue") {
+ translate([0, - offset - radius, eps + bulge[3]])
+ rounded_rectangle([bulge.x, 2 * (bulge.y - radius), bulge.z], 0.5, center = false);
- h2 = gs_bulge2_h(type);
- translate([0, - offset, h1 + 1 - h2])
- linear_extrude(h2)
- round(0.5)
- intersection() {
- circle(gs_bulge2_d(type));
+ if(bulge2.z)
+ translate([0, - offset, bulge.z + 1 - bulge2.z])
+ linear_extrude(bulge2.z)
+ round(0.5)
+ intersection() {
+ circle(bulge2.y);
- translate([0, -50])
- square([gs_bulge2_w(type), 100], center = true);
- }
+ translate([0, -50])
+ square([bulge2.x, 100], center = true);
+ }
}
- translate_z(2.5)
- for(i = [0 : 4])
- translate([i - 2.5, 0])
- rotate([90, 0, 0])
- color(["yellow", "orange", "red", "pink", "blue"][i])
- cylinder(d = 1, h = radius + offset + 10);
+ wire_d = gs_wire_d(type);
+ for(j = [0 : len(wires) - 1], i = [0 : len(wires[j]) - 1])
+ translate([(i - len(wires[j]) / 2 + 0.5) * wire_d, 0, bulge_z + (j ? bulge.z - 2.5 : 2.5)])
+ rotate([90, 0, 0])
+ color(wires[j][i])
+ cylinder(d = wire_d, h = radius + offset + 10);
}
diff --git a/vitamins/geared_steppers.scad b/vitamins/geared_steppers.scad
index 917e89c..ae5bd9e 100644
--- a/vitamins/geared_steppers.scad
+++ b/vitamins/geared_steppers.scad
@@ -20,8 +20,16 @@
//
//! Geared tin can steppers
//
-28BYJ_48 = ["28BYJ_48", "28BYJ-48 5V", 28, 19, 35, 7, 0.85, 4.2, 8, 9, 1.5, 5, 3, 10, 6, 14.7, 17, 16.5, 17.7, 15.5, 13.8 ];
+// d h r m p l l h o b b s f s f b b w
+// i e a o i u u o f o o h l h l u u i
+// a i d t t g g l f s s a a a a l l r
+// g i o c e s s s f t f t g g e
+// h u r h w t e t t e e
+// t s d t d h w l 2 d
+// d h r d l w d h z w d h
+28BYJ_48 = ["28BYJ_48", "28BYJ-48 5V", 28, 19, 1, [ 0, 0, 0], 35, 7, 0.85, 4.2, 8, 9, 1.5, 5,-3.0, 10, 6, [14.7, 17, 16.5, 0], [17.7, 15.5, 13.8], 1, [["yellow", "orange", "red", "pink", "blue"]] ];
+35BYGHJ75 = ["35BYGHJ75", "35BYGHJ75 0.4A",37, 37, -2, [35, 22, 1], 27, 0, 0, 3.0, 7, 12, 3.0, 5, 4.5, 17, 10, [ 7.7, 20.7, 9.25, 21], [ 0, 0, 0], 1.3,[["brown", "red"], ["yellow", "green"]] ];
-geared_steppers = [28BYJ_48];
+geared_steppers = [28BYJ_48, 35BYGHJ75];
use