common/motors.scad

include <./common.scad>;

//NEMA 17 Constants
NEMA17OuterWidth = 42;
NEMA17BoltD = 3;
NEMA17BoltSpacing = 31;
NEMA17BoltOffsetZ = -1.9;
NEMA17ShaftD = 5;
NEMA17PadD = 22;
NEMA17ShaftHobble = 4.5;
NEMA17ShaftHobbleZ = 4.7;

//Geared Motor Constants
GearedMotorBoxX = 46;
GearedMotorBoxY = 32;
GearedMotorBoxZ = 21;
GearedMotorMountX = 32.5;
GearedMotorMountY = 17.5;
GearedMotorShaftD = 6;
GearedMotorShaftH = 16;
GearedMotorShaftHobble = 1;

module NEMA17_motor_shaft (pos = [0, 0, 0], L = 22.75) {
    //shaft
    translate(pos) difference () {
        cylinder(r = R(NEMA17ShaftD), h = L, center = true, $fn = 30);
        translate([0, NEMA17ShaftHobble, NEMA17ShaftHobbleZ]) cube([NEMA17ShaftD, NEMA17ShaftD, L+1], center = true);
    }
}

module NEMA17_bolt_void (pos = [0, 0, 0]) {
	translate(pos) cylinder(r = R(NEMA17BoltD), h = 4, center = true, $fn=30);
}

module NEMA17_pad (pos = [0, 0, 0]) {
	translate(pos) {
		cylinder(r = R(NEMA17PadD), h = 1.9, center = true, $fn = 100);
	}
}

//NEMA17 Stepper
module NEMA17 (pos = [0, 0, 0], H = 33 ) { //alt = 47.5
	BoltX = NEMA17BoltSpacing / 2;
	BoltY = NEMA17BoltSpacing / 2;
	BoltZ = (H / 2) + NEMA17BoltOffsetZ;
	translate(pos) {
		difference () {
			cube([NEMA17OuterWidth, NEMA17OuterWidth, H], center = true);
			//corners
			for (i = [0 : 3]) {
				rotate([0, 0, (i * 90) + 45]) translate([29.7, 0, 0]) cube([5.5, 5.5, H + 1], center = true);
			}
			NEMA17_bolt_void([BoltX, BoltY, BoltZ]);
			NEMA17_bolt_void([-BoltX, BoltY, BoltZ]);
			NEMA17_bolt_void([BoltX, -BoltY, BoltZ]);
			NEMA17_bolt_void([-BoltX, -BoltY, BoltZ]);
		}
		//pad
		NEMA17_pad([0, 0, (H/2) + (1.9/2)]);
		//shaft
		NEMA17_motor_shaft([0, 0, (H/2) + (22.75/2)]);
	}
}

module geared_motor_shaft (pos = [0, 0, 0], rot = [0, 0, 0]) {
	translate(pos) rotate(rot) difference () {
		cylinder(r = R(GearedMotorShaftD), h = GearedMotorShaftH, center = true, $fn = 60);
		translate([GearedMotorShaftD - GearedMotorShaftHobble, 0, 0]) cube([GearedMotorShaftD, GearedMotorShaftD, GearedMotorShaftH + 1], center = true);
	}
}

module geared_motor_mount_pad (pos = [0, 0, 0], D, Z) {
	translate(pos) difference () {
		cylinder(r = R(D), h = Z, center = true, $fn = 40);
		//bolt void
		cylinder(r = R(2.5), h = Z + 1, center = true, $fn = 40);
	}
}

module geared_motor_mounts (pos = [0, 0, 0]) {
	MountX = GearedMotorMountX / 2;
	MountY = GearedMotorMountY / 2;
	Z = 1.5;
	D = 7.5;
	translate(pos) {
		geared_motor_mount_pad([MountX, MountY, 0], D, Z);
		geared_motor_mount_pad([-MountX, MountY, 0], D, Z);
		geared_motor_mount_pad([MountX, -MountY, 0], D, Z);
		geared_motor_mount_pad([-MountX, -MountY, 0], D, Z);
	}
}

//Geartisan Worm Gear Motor - JSX40-370
module geared_motor (pos = [0, 0, 0]) {
	translate(pos) {
		cube([GearedMotorBoxX, GearedMotorBoxY, GearedMotorBoxZ], center = true);
		translate([(GearedMotorBoxX / 2) + (30 / 2), 0, 1.5]) rotate([0, 90, 0]) cylinder(r = 24 / 2, h = 30, center = true, $fn = 80);
		geared_motor_shaft([-(46 / 2) + 14.5, 0, -18.5], [0, 0, 90]);
		//pad
		translate([-(46 / 2) + 14.5, 0, -(1 / 2) - 10.5]) cylinder(r = 13 / 2, h = 1, center = true, $fn = 60);
		//mount pads
		geared_motor_mounts([-0.5, 0, -(1.5 / 2) - 10.5]);
	}
}