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Made stepper motor encap paramatric. 

Made connector position based on encap height and added PCB.
This commit is contained in:
Chris Palmer 2020-11-12 23:36:35 +00:00
parent 90047815b0
commit 9a0bad4e61
5 changed files with 42 additions and 19 deletions
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1
readme.md
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@ -3413,6 +3413,7 @@ NEMA stepper motor model.
| ```NEMA_body_radius(type)``` | Body radius |
| ```NEMA_boss_height(type)``` | Boss height |
| ```NEMA_boss_radius(type)``` | Boss around the spindle radius |
| ```NEMA_cap_heights(type)``` | Height of the end cap at the corner and the side |
| ```NEMA_hole_pitch(type)``` | Screw hole pitch |
| ```NEMA_length(type)``` | Body length |
| ```NEMA_radius(type)``` | End cap radius |

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tests/png/stepper_motors.png
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6
tests/stepper_motors.scad
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@ -22,12 +22,12 @@ include <../vitamins/stepper_motors.scad>
use <../utils/layout.scad>
module stepper_motors()
layout([for(s = stepper_motors) NEMA_width(s)], 5) {
layout([for(s = stepper_motors) NEMA_width(s)], 5) let(m = stepper_motors[$i]) {
rotate(180)
NEMA(stepper_motors[$i], 0, $i > 1 && $i < 5);
NEMA(m, 0, m == NEMA17M || m == NEMA17M8);
translate_z(4)
NEMA_screws(stepper_motors[$i], M3_pan_screw, n = $i, earth = $i > 4 ? undef : $i - 1);
NEMA_screws(m, M3_pan_screw, n = $i, earth = $i > 4 ? undef : $i - 1);
}
if($preview)

38
vitamins/stepper_motor.scad
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@ -26,6 +26,7 @@ include <ring_terminals.scad>
include <../vitamins/pin_headers.scad>
use <../utils/tube.scad>
use <../utils/thread.scad>
use <../utils/round.scad>
use <washer.scad>
use <rod.scad>
@ -38,6 +39,8 @@ function NEMA_boss_height(type) = type[6]; //! Boss height
function NEMA_shaft_dia(type) = type[7]; //! Shaft diameter
function NEMA_shaft_length(type)= type[8]; //! Shaft length above the face, if a list then a leadscrew: length, lead, starts
function NEMA_hole_pitch(type) = type[9]; //! Screw hole pitch
function NEMA_cap_heights(type) = type[10]; //! Height of the end cap at the corner and the side
function NEMA_holes(type) = [-NEMA_hole_pitch(type) / 2, NEMA_hole_pitch(type) / 2]; //! Screw positions for for loop
function NEMA_big_hole(type) = NEMA_boss_radius(type) + 0.2; //! Clearance hole for the big boss
stepper_body_colour = "black";
@ -59,12 +62,13 @@ module NEMA(type, shaft_angle = 0, jst_connector = false) { //! Draw specified N
boss_rad = NEMA_boss_radius(type);
boss_height =NEMA_boss_height(type);
shaft_rad = NEMA_shaft_dia(type) / 2;
cap = 8;
cap = NEMA_cap_heights(type)[1];
cap2 = NEMA_cap_heights(type)[0];
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?
thread_d = 3; // Is this always the case?
module cap_shape(end)
difference() {
round(0.5, $fn = 32) difference() {
intersection() {
square([side, side], center = true);
@ -92,22 +96,40 @@ module NEMA(type, shaft_angle = 0, jst_connector = false) { //! Draw specified N
cap_shape(1);
}
tabSize = [16, 4, 2.5];
pcb_thickness = 1.6;
header = jst_ph_header;
socket_size = hdr_box_size(header);
tabSize = [16, 4, cap - hdr_ra_height(header) - pcb_thickness];
color(stepper_cap_colour) { // aluminium end caps
for(end = [-1, 1])
for(end = [-1, 1]) {
translate_z(-length / 2 + end * (length - cap) / 2)
linear_extrude(cap, center = true)
cap_shape(end);
translate_z(-length / 2 + end * (length - cap2) / 2)
linear_extrude(cap2, center = true)
difference() {
cap_shape(end);
circle(body_rad);
}
}
if(jst_connector)
translate([-tabSize.x / 2, side / 2, -length])
cube(tabSize);
}
if(jst_connector)
translate([0, side / 2 - 2, -length + tabSize.z + 5.75 / 2])
rotate([-90, 0, 0])
jst_xh_header(jst_xh_header, 6);
translate([0, side / 2, -length + cap - hdr_ra_height(header)]) {
rotate(180)
not_on_bom()
jst_xh_header(header, 6, true);
translate_z(-pcb_thickness / 2)
color("green")
cube([socket_size.x + 5 * 2, tabSize.y * 2, pcb_thickness], true);
}
if(show_threads)
for(x = NEMA_holes(type), y = NEMA_holes(type))

16
vitamins/stepper_motors.scad
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@ -22,14 +22,14 @@
//
// corner body boss boss shaft
// side, length, radius, radius, radius, depth, shaft, length, holes
NEMA17 = ["NEMA17", 42.3, 47, 53.6/2, 25, 11, 2, 5, 24, 31];
NEMA17M = ["NEMA17M", 42.3, 40, 53.6/2, 25, 11, 2, 5, 20, 31];
NEMA17M8= ["NEMA17M8", 42.3, 40, 53.6/2, 25, 11, 2, 8, [280, 8, 4], 31];
NEMA17S = ["NEMA17S", 42.3, 34, 53.6/2, 25, 11, 2, 5, 24, 31];
NEMA16 = ["NEMA16", 39.5, 19.2, 50.6/2, 50.6/2, 11, 2, 5, 12, 31];
NEMA14 = ["NEMA14", 35.2, 36, 46.4/2, 21, 11, 2, 5, 21, 26];
NEMA23 = ["NEMA23", 56.4, 51.2, 75.7/2, 35, 38.1/2, 1.6, 6.35, 24, 47.1];
// side, length, radius, radius, radius, depth, shaft, length, holes, cap heights
NEMA17 = ["NEMA17", 42.3, 47, 53.6/2, 25, 11, 2, 5, 24, 31, [11.5, 9]];
NEMA17M = ["NEMA17M", 42.3, 40, 53.6/2, 25, 11, 2, 5, 20, 31, [12.5, 11]];
NEMA17M8= ["NEMA17M8", 42.3, 40, 53.6/2, 25, 11, 2, 8, [280, 8, 4], 31, [12.5, 11]];
NEMA17S = ["NEMA17S", 42.3, 34, 53.6/2, 25, 11, 2, 5, 24, 31, [8, 8]];
NEMA16 = ["NEMA16", 39.5, 19.2, 50.6/2, 50.6/2, 11, 2, 5, 12, 31, [8, 8]];
NEMA14 = ["NEMA14", 35.2, 36, 46.4/2, 21, 11, 2, 5, 21, 26, [8, 8]];
NEMA23 = ["NEMA23", 56.4, 51.2, 75.7/2, 35, 38.1/2, 1.6, 6.35, 24, 47.1, [8, 8]];
stepper_motors = [NEMA14, NEMA16, NEMA17S, NEMA17M, NEMA17, NEMA23];