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Added threads to stepper motors and made the test show them.

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This commit is contained in:
Chris Palmer 2020-02-28 12:02:24 +00:00
parent 07b00fabe0
commit bcff26a27b
5 changed files with 18 additions and 8 deletions
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libtest.png
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7
readme.md
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@ -3020,15 +3020,16 @@ NEMA stepper motor model.
### Vitamins
| Qty | Module call | BOM entry |
| ---:|:--- |:---|
| 24 | ```screw(M3_pan_screw, 8)``` | Screw M3 pan x 8mm |
| 4 | ```ring_terminal(M3_ringterm)``` | Ring terminal 3mm |
| 15 | ```screw(M3_pan_screw, 8)``` | Screw M3 pan x 8mm |
| 1 | ```NEMA(NEMA14)``` | Stepper motor NEMA14 x 36mm |
| 1 | ```NEMA(NEMA16)``` | Stepper motor NEMA16 x 19.2mm |
| 1 | ```NEMA(NEMA17S)``` | Stepper motor NEMA17 x 34mm |
| 1 | ```NEMA(NEMA17M)``` | Stepper motor NEMA17 x 40mm |
| 1 | ```NEMA(NEMA17)``` | Stepper motor NEMA17 x 47mm |
| 1 | ```NEMA(NEMA23)``` | Stepper motor NEMA22 x 51.2mm |
| 24 | ```washer(M3_washer)``` | Washer M3 x 7mm x 0.5mm |
| 24 | ```star_washer(M3_washer)``` | Washer star M3 x 0.5mm |
| 11 | ```washer(M3_washer)``` | Washer M3 x 7mm x 0.5mm |
| 15 | ```star_washer(M3_washer)``` | Washer star M3 x 0.5mm |
<a href="#top">Top</a>

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6
tests/stepper_motors.scad
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@ -27,8 +27,10 @@ module stepper_motors()
rotate(180)
NEMA(stepper_motors[$i]);
NEMA_screws(stepper_motors[$i], M3_pan_screw);
translate_z(4)
NEMA_screws(stepper_motors[$i], M3_pan_screw, n = $i, earth = $i > 4 ? undef : 0);
}
if($preview)
stepper_motors();
let($show_threads = 1)
stepper_motors();

13
vitamins/stepper_motor.scad
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@ -26,6 +26,7 @@ include <screws.scad>
use <washer.scad>
include <ring_terminals.scad>
use <../utils/tube.scad>
use <../utils/thread.scad>
use <rod.scad>
function NEMA_width(type) = type[1]; //! Width of the square face
@ -60,6 +61,7 @@ module NEMA(type, shaft_angle = 0) { //! Draw specified NEMA stepper motor
shaft_rad = NEMA_shaft_dia(type) / 2;
cap = 8;
vitamin(str("NEMA(", type[0], "): Stepper motor NEMA", round(NEMA_width(type) / 2.54), " x ", length, "mm"));
thread_d = 3; // Is this always the case?
union() {
color(stepper_body_colour) // black laminations
@ -75,7 +77,7 @@ module NEMA(type, shaft_angle = 0) { //! Draw specified NEMA stepper motor
tube(or = boss_rad, ir = shaft_rad + 2, h = boss_height * 2); // raised boss
for(end = [-1, 1])
translate_z(-length / 2 + end * (length - cap) / 2)
translate_z(-length / 2 + end * (length - cap) / 2) {
linear_extrude(height = cap, center = true)
difference() {
intersection() {
@ -85,9 +87,14 @@ module NEMA(type, shaft_angle = 0) { //! Draw specified NEMA stepper motor
if(end > 0)
for(x = NEMA_holes(type), y = NEMA_holes(type))
translate([x, y])
circle(r = 3/2);
circle(d = thread_d);
}
}
}
if(show_threads)
for(x = NEMA_holes(type), y = NEMA_holes(type))
translate([x, y, -cap / 2])
female_metric_thread(thread_d, metric_coarse_pitch(thread_d), cap, colour = stepper_cap_colour);
shaft = NEMA_shaft_length(type);
translate_z(-5)
@ -112,7 +119,7 @@ module NEMA(type, shaft_angle = 0) { //! Draw specified NEMA stepper motor
module NEMA_screw_positions(type, n = 4) { //! Positions children at the screw holes
pitch = NEMA_hole_pitch(type);
for($i = [0 : n - 1])
for($i = [0 : 1 : min(n - 1, 4)])
rotate($i * 90)
translate([pitch / 2, pitch / 2])
rotate($i * -90)