$fn=100;

EXTRUSION_W = 40;
EXTRUSION_H = 40;
EXTRUSION_D = 40;

MOTOR_W = 43;
MOTOR_H = 43;


p = [
     [0,                    0],
     [0,                    EXTRUSION_H - MOTOR_H / 2 + MOTOR_H - 1.5],
     [MOTOR_W + 5,          EXTRUSION_H - MOTOR_H / 2 + MOTOR_H - 1.5],
     [MOTOR_W + 5,          EXTRUSION_H],
     [MOTOR_W + 5 + 60,     EXTRUSION_H],
     [MOTOR_W + 5 + 60,     0],
    ];

p2 = [
      [0,               0],
      [0,               EXTRUSION_H - MOTOR_H / 2 - 1.5],
      [EXTRUSION_D,     EXTRUSION_H - MOTOR_H / 2 + MOTOR_H - 1.5],
      [EXTRUSION_D + 5, EXTRUSION_H - MOTOR_H / 2 + MOTOR_H - 1.5],
      [EXTRUSION_D + 5, 0],
     ];


module plate()
{

    difference()
    {
        union()
        {
            
            translate([0,5,0])
            rotate([90,0,0])
            linear_extrude(5)
            polygon(p);
            


            hull()
            {
                translate([0,5,0])
                rotate([90,0,0])
                linear_extrude(5)
                square([MOTOR_W + 60 + 5, EXTRUSION_H - 1.5 - 8]);

                translate([MOTOR_W - 6, 5+12-1, 0])
                rotate([90,0,0])
                linear_extrude(1)
                square([60 + 5 + 6, EXTRUSION_H - 1.5 - 8 - 2]);

                translate([MOTOR_W, 5+20-1, 0])
                rotate([90,0,0])
                linear_extrude(1)
                square([60 + 5 - 8, EXTRUSION_H - 1.5 - 8 - 2 - 4]);
            }
            
            translate([0, -EXTRUSION_D, 0])
            cube([MOTOR_W, EXTRUSION_D, EXTRUSION_H - MOTOR_H / 2 - 1.5]);
            
            translate([-5, -EXTRUSION_D, 0])
            rotate([90,0,90])
            linear_extrude(5)
            polygon(p2);

            translate([MOTOR_W, -EXTRUSION_D, 0])
            rotate([90,0,90])
            linear_extrude(5)
            polygon(p2);
            
        }

        // Motor shaft hole
        translate([MOTOR_W / 2, 25, EXTRUSION_H - 1.5])
        rotate([90,0,0])
        cylinder(26, r= 24/2);


        // Motor screws holes
        translate([6, 25, EXTRUSION_H - MOTOR_H / 2 + 6  - 1.5])
        rotate([90,0,0])
        cylinder(26, r= 3.3/2);

        translate([6, 25, EXTRUSION_H - MOTOR_H / 2 + 6  - 1.5])
        rotate([90,0,0])
        cylinder(21, r= 6/2);

        translate([MOTOR_W - 6, 25, EXTRUSION_H - MOTOR_H / 2 + 6 - 1.5])
        rotate([90,0,0])
        cylinder(26, r= 3.3/2);

        translate([MOTOR_W - 6, 25, EXTRUSION_H - MOTOR_H / 2 + 6 - 1.5])
        rotate([90,0,0])
        cylinder(21, r= 6/2);


        translate([6, 25, EXTRUSION_H - MOTOR_H / 2 + MOTOR_H - 6 - 1.5])
        rotate([90,0,0])
        cylinder(26, r= 3.3/2);

        translate([MOTOR_W - 6, 25, EXTRUSION_H - MOTOR_H / 2 + MOTOR_H - 6 - 1.5])
        rotate([90,0,0])
        cylinder(26, r= 3.3/2);


        // part screw hold hole 1
        translate([MOTOR_W + 15, 25, EXTRUSION_H / 2])
        rotate([90,0,0])
        cylinder(26, r= 6.3/2);

        translate([MOTOR_W + 15, 25, EXTRUSION_H / 2])
        rotate([90,0,0])
        cylinder(21, r= 12/2);

        // part screw hold hole 2
        translate([MOTOR_W + 15 + 30, 25, EXTRUSION_H / 2])
        rotate([90,0,0])
        cylinder(26, r= 6.3/2);

        translate([MOTOR_W + 15 + 30, 25, EXTRUSION_H / 2])
        rotate([90,0,0])
        cylinder(20, r= 12/2);

    }
}

plate();