$fn = 50;

motorheight = 42.1;
motorwidth = 40.5;
wanddickemotor = 3;
wanddickelinks = 5.5;


cylinderdiameter = 22.2;

motorholedistance = (motorheight - 31) / 2;
leftholedist = 7;
M3HoleDiam = 3.4;
M3HeadDiam = 5.8;

Motorhalter();

module Motorhalter() {
    render() difference() {
        mainbody();
        translate([motorwidth, wanddickelinks, 0]) motorholes();
        leftholes();
    }
}


//modules

module mainbody() {
    cube([motorwidth + wanddickemotor, wanddickelinks, motorheight]);

    translate([motorwidth, wanddickelinks, 0])cube([wanddickemotor, motorheight, motorheight]);

    translate([motorwidth + wanddickemotor, motorheight * 2 / 3, motorheight]) rotate([0, 0, 180]) linear_extrude(3)
        polygon([[0, 0], [0, motorheight * 2 / 3], [motorwidth * 2 / 3, motorheight * 2 / 3]]);
}

module motorholes() {
    translate([0, motorheight / 2, motorheight / 2])rotate([0, 90, 0])cylinder(h = wanddickemotor, d = cylinderdiameter,
    $fn = 130);

    translate([0, motorheight - motorholedistance, motorheight - motorholedistance]) MotorM3Hole();

    translate([0, motorheight - motorholedistance, motorholedistance]) MotorM3Hole();

    translate([0, motorholedistance, motorheight - motorholedistance]) MotorM3Hole();

    translate([0, motorholedistance, motorholedistance]) MotorM3Hole();
}

module leftholes() {
    // bottom left
    translate([leftholedist, 0, leftholedist]) LeftM3Hole();
    //bottom right
    translate([motorwidth - leftholedist, 0, leftholedist]) LeftM3Hole();
    // upper left
    translate([leftholedist, 0, motorwidth - leftholedist]) LeftM3Hole();
    // upper right
    translate([motorwidth - leftholedist, 0, motorwidth - leftholedist]) LeftM3Hole();
}


module MotorM3Hole() {
    rotate([0, 90, 0])cylinder(h = wanddickemotor, d = M3HoleDiam);
}

module LeftM3Hole() {
    rotate([270, 0, 0])cylinder(h = wanddickelinks, d = M3HoleDiam);
    translate([0, wanddickelinks - 3, 0]) rotate([270, 0, 0])cylinder(h = 3, d = M3HeadDiam);
}