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Made the ground surfaces of steppers lighter.

This commit is contained in:
Chris Palmer 2020-04-02 19:54:30 +01:00
parent 7b3d7fab55
commit f5980b4703
3 changed files with 53 additions and 46 deletions
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99
vitamins/stepper_motor.scad
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@ -42,6 +42,7 @@ function NEMA_big_hole(type) = NEMA_boss_radius(type) + 0.2; //! Clearance ho
stepper_body_colour = "black";
stepper_cap_colour = grey50;
stepper_machined_colour = grey90;
module NEMA_outline(type) //! 2D outline
intersection() {
@ -62,57 +63,63 @@ module NEMA(type, shaft_angle = 0) { //! Draw specified NEMA stepper motor
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
translate_z(-length / 2)
linear_extrude(length - cap * 2, center = true)
intersection() {
square([side, side], center = true);
module cap_shape(end)
difference() {
intersection() {
square([side, side], center = true);
circle(body_rad);
}
color(stepper_cap_colour) { // aluminium end caps
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) {
linear_extrude(cap, center = true)
difference() {
intersection() {
square([side, side], center = true);
circle(NEMA_radius(type));
}
if(end > 0)
for(x = NEMA_holes(type), y = NEMA_holes(type))
translate([x, y])
circle(d = thread_d);
}
}
circle(NEMA_radius(type), $fn = 360);
}
if(end > 0)
for(x = NEMA_holes(type), y = NEMA_holes(type))
translate([x, y])
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)
rotate(shaft_angle)
if(!is_list(shaft))
color(stepper_cap_colour)
cylinder(r = shaft_rad, h = shaft + 5); // shaft
else
not_on_bom()
leadscrew(shaft_rad * 2, shaft.x + 5, shaft.y, shaft.z, center = false)
color(stepper_body_colour) // black laminations
translate_z(-length / 2)
linear_extrude(length - cap * 2, center = true)
intersection() {
square([side, side], center = true);
translate([0, side / 2, -length + cap / 2])
rotate([90, 0, 0])
for(i = [0 : 3])
rotate(225 + i * 90)
color(["red", "blue","green","black"][i])
translate([1, 0, 0])
cylinder(r = 1.5 / 2, h = 12, center = true);
circle(body_rad);
}
color(stepper_machined_colour) {
tube(or = boss_rad, ir = shaft_rad + 2, h = boss_height * 2); // raised boss
linear_extrude(eps)
cap_shape(true);
}
color(stepper_cap_colour) // aluminium end caps
for(end = [-1, 1])
translate_z(-length / 2 + end * (length - cap) / 2)
linear_extrude(cap, center = true)
cap_shape(end);
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)
rotate(shaft_angle)
if(!is_list(shaft))
color(stepper_machined_colour)
cylinder(r = shaft_rad, h = shaft + 5); // shaft
else
not_on_bom()
leadscrew(shaft_rad * 2, shaft.x + 5, shaft.y, shaft.z, center = false)
translate([0, side / 2, -length + cap / 2])
rotate([90, 0, 0])
for(i = [0 : 3])
rotate(225 + i * 90)
color(["red", "blue","green","black"][i])
translate([1, 0, 0])
cylinder(r = 1.5 / 2, h = 12, center = true);
}
module NEMA_screw_positions(type, n = 4) { //! Positions children at the screw holes