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NEMA.scad
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NEMA.scad
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use <GDMUtils.scad>
function nema_motor_width(size) = lookup(size, [
[11.0, 28.2],
[14.0, 35.2],
[17.0, 42.3],
[23.0, 57.0],
[34.0, 86.0],
]);
function nema_motor_plinth_height(size) = lookup(size, [
[11.0, 1.5],
[14.0, 2.0],
[17.0, 2.0],
[23.0, 1.6],
[34.0, 2.03],
]);
function nema_motor_plinth_diam(size) = lookup(size, [
[11.0, 22.0],
[14.0, 22.0],
[17.0, 22.0],
[23.0, 38.1],
[34.0, 73.0],
]);
function nema_motor_screw_spacing(size) = lookup(size, [
[11.0, 23.11],
[14.0, 26.0],
[17.0, 30.99],
[23.0, 47.14],
[34.0, 69.6],
]);
function nema_motor_screw_size(size) = lookup(size, [
[11.0, 2.6],
[14.0, 3.0],
[17.0, 3.0],
[23.0, 5.1],
[34.0, 5.5],
]);
function nema_motor_screw_depth(size) = lookup(size, [
[11.0, 3.0],
[14.0, 4.5],
[17.0, 4.5],
[23.0, 4.8],
[34.0, 9.0],
]);
module nema11_stepper(h=24, shaft=5, shaft_len=20)
{
size = 11;
motor_width = nema_motor_width(size);
plinth_height = nema_motor_plinth_height(size);
plinth_diam = nema_motor_plinth_diam(size);
screw_spacing = nema_motor_screw_spacing(size);
screw_size = nema_motor_screw_size(size);
screw_depth = nema_motor_screw_depth(size);
difference() {
color([0.4, 0.4, 0.4]) {
translate([0, 0, -h/2]) {
rrect(size=[motor_width, motor_width, h], r=2, center=true);
}
}
xspread(screw_spacing)
yspread(screw_spacing)
down(scred_depth/2-0.05)
cylinder(r=screw_size/2, h=screw_depth, center=true, $fn=max(12,segs(screw_size/2)));
}
color([0.4, 0.4, 0.4])
translate([0, 0, plinth_height/2])
cylinder(h=plinth_height, r=plinth_diam/2, center=true);
color("silver")
translate([0, 0, shaft_len/2])
cylinder(h=shaft_len, r=shaft/2, center=true, $fn=max(12,segs(shaft/2)));
}
//!nema11_stepper();
module nema14_stepper(h=24, shaft=5, shaft_len=24)
{
size = 14;
motor_width = nema_motor_width(size);
plinth_height = nema_motor_plinth_height(size);
plinth_diam = nema_motor_plinth_diam(size);
screw_spacing = nema_motor_screw_spacing(size);
screw_size = nema_motor_screw_size(size);
screw_depth = nema_motor_screw_depth(size);
difference() {
color([0.4, 0.4, 0.4]) {
translate([0, 0, -h/2]) {
rrect(size=[motor_width, motor_width, h], r=2, center=true);
}
}
xspread(screw_spacing)
yspread(screw_spacing)
down(screw_depth/2-0.05)
cylinder(r=screw_size/2, h=screw_depth, center=true, $fn=max(12,segs(screw_size/2)));
}
color([0.4, 0.4, 0.4])
translate([0, 0, plinth_height/2])
cylinder(h=plinth_height, r=plinth_diam/2, center=true);
color("silver")
translate([0, 0, shaft_len/2])
cylinder(h=shaft_len, r=shaft/2, center=true, $fn=max(12,segs(shaft/2)));
}
//!nema14_stepper();
module nema17_stepper(h=34, shaft=5, shaft_len=20)
{
size = 17;
motor_width = nema_motor_width(size);
plinth_height = nema_motor_plinth_height(size);
plinth_diam = nema_motor_plinth_diam(size);
screw_spacing = nema_motor_screw_spacing(size);
screw_size = nema_motor_screw_size(size);
screw_depth = nema_motor_screw_depth(size);
difference() {
color([0.4, 0.4, 0.4]) {
down(h/2) {
rrect(size=[motor_width, motor_width, h], r=2, center=true);
}
}
xspread(screw_spacing)
yspread(screw_spacing)
down(screw_depth/2-0.05)
cylinder(r=screw_size/2, h=screw_depth, center=true, $fn=max(12,segs(screw_size/2)));
}
color([0.4, 0.4, 0.4])
up(plinth_height/2)
cylinder(h=plinth_height, r=plinth_diam/2, center=true);
color([0.9, 0.9, 0.9]) {
down(h-motor_width/12) {
fwd(motor_width/2+motor_width/24/2-0.1) {
difference() {
cube(size=[motor_width/8, motor_width/24, motor_width/8], center=true);
xrot(90) {
cylinder(d=motor_width/8-2, h=motor_width/6, center=true, $fn=12);
}
}
}
}
}
color("silver") {
difference() {
cylinder(h=shaft_len, r=shaft/2, $fn=max(12,segs(shaft/2)));
up(shaft_len/2+1) {
right(shaft_len/2+shaft/2-0.5) {
cube(shaft_len, center=true);
}
}
}
}
}
//!nema17_stepper();
module nema23_stepper(h=50, shaft=6.35, shaft_len=25)
{
size = 23;
motor_width = nema_motor_width(size);
plinth_height = nema_motor_plinth_height(size);
plinth_diam = nema_motor_plinth_diam(size);
screw_spacing = nema_motor_screw_spacing(size);
screw_size = nema_motor_screw_size(size);
screw_depth = nema_motor_screw_depth(size);
screw_inset = motor_width - screw_spacing + 1;
difference() {
union() {
color([0.4, 0.4, 0.4]) {
translate([0, 0, -h/2]) {
rrect(size=[motor_width, motor_width, h], r=2, center=true);
}
}
color([0.4, 0.4, 0.4])
translate([0, 0, plinth_height/2])
cylinder(h=plinth_height, r=plinth_diam/2, center=true);
color("silver")
translate([0, 0, shaft_len/2])
cylinder(h=shaft_len, r=shaft/2, center=true, $fn=max(12,segs(shaft/2)));
}
xspread(screw_spacing) {
yspread(screw_spacing) {
down(screw_depth/2)
cylinder(r=screw_size/2, h=screw_depth+2, center=true, $fn=max(12,segs(screw_size/2)));
down(screw_depth+h/2)
cube(size=[screw_inset, screw_inset, h], center=true);
}
}
}
}
//!nema23_stepper();
module nema34_stepper(h=75, shaft=12.7, shaft_len=32)
{
size = 34;
motor_width = nema_motor_width(size);
plinth_height = nema_motor_plinth_height(size);
plinth_diam = nema_motor_plinth_diam(size);
screw_spacing = nema_motor_screw_spacing(size);
screw_size = nema_motor_screw_size(size);
screw_depth = nema_motor_screw_depth(size);
screw_inset = motor_width - screw_spacing + 1;
difference() {
union() {
color([0.4, 0.4, 0.4]) {
translate([0, 0, -h/2]) {
rrect(size=[motor_width, motor_width, h], r=2, center=true);
}
}
color([0.4, 0.4, 0.4])
translate([0, 0, plinth_height/2])
cylinder(h=plinth_height, r=plinth_diam/2, center=true);
color("silver")
translate([0, 0, shaft_len/2])
cylinder(h=shaft_len, r=shaft/2, center=true, $fn=max(24,segs(shaft/2)));
}
xspread(screw_spacing) {
yspread(screw_spacing) {
down(screw_depth/2)
cylinder(r=screw_size/2, h=screw_depth+2, center=true, $fn=max(12,segs(screw_size/2)));
down(screw_depth+h/2)
cube(size=[screw_inset, screw_inset, h], center=true);
}
}
}
}
//!nema34_stepper();
module nema17_mount_holes(depth=5, l=5, slop=0)
{
size = 17;
plinth_diam = nema_motor_plinth_diam(size)+slop;
screw_spacing = nema_motor_screw_spacing(size);
screw_size = nema_motor_screw_size(size)+slop;
union() {
xspread(screw_spacing) {
yspread(screw_spacing) {
if (l>0) {
union() {
yspread(l) cylinder(h=depth, r=screw_size/2, center=true, $fn=max(8,segs(screw_size/2)));
cube([screw_size/2, l, depth], center=true);
}
} else {
cylinder(h=depth, r=screw_size/2, center=true, $fn=max(8,segs(screw_size/2)));
}
}
}
}
if (l>0) {
union () {
yspread(l) cylinder(h=depth, r=plinth_diam/2, center=true);
cube([plinth_diam/2, l, depth], center=true);
}
} else {
cylinder(h=depth, r=plinth_diam/2, center=true);
}
}
//!nema17_mount_holes(depth=5, l=5);
// vim: noexpandtab tabstop=4 shiftwidth=4 softtabstop=4 nowrap