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Added 35BYGHJ75 geared stepper.

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This commit is contained in:
Chris Palmer
2021-04-25 00:07:22 +01:00
parent ac0bacfeda
commit 49fdfea792
7 changed files with 121 additions and 63 deletions
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libtest.png
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4
libtest.scad
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@@ -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])

13
readme.md
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@@ -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 |
<a href="#top">Top</a>

2
tests/geared_steppers.scad
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@@ -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();

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vitamins/geared_stepper.scad
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@@ -26,42 +26,66 @@ 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") {
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])
rounded_cylinder(r = radius, h = height, r2 = 1);
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))
if(lug_t)
linear_extrude(lug_t)
difference() {
hull()
geared_stepper_screw_positions(type)
@@ -71,44 +95,69 @@ module geared_stepper(type) { //! Draw the specified geared stepper
circle(d = gs_hole_d(type));
}
if(!bulge_z)
translate([0, -offset - radius, eps])
cube([gs_bulge_w(type) - 2, 2 * (gs_bulge_d(type) - radius) - 2, 2 * eps], center = true);
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)
if(bulge2.z)
translate([0, - offset, bulge.z + 1 - bulge2.z])
linear_extrude(bulge2.z)
round(0.5)
intersection() {
circle(gs_bulge2_d(type));
circle(bulge2.y);
translate([0, -50])
square([gs_bulge2_w(type), 100], center = true);
square([bulge2.x, 100], center = true);
}
}
translate_z(2.5)
for(i = [0 : 4])
translate([i - 2.5, 0])
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(["yellow", "orange", "red", "pink", "blue"][i])
cylinder(d = 1, h = radius + offset + 10);
color(wires[j][i])
cylinder(d = wire_d, h = radius + offset + 10);
}

12
vitamins/geared_steppers.scad
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@@ -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 <geared_stepper.scad>