Bracket for mounting the stock PSU that comes with the Ultimaker beneath the printer

psu-holder.scad

psuX=65;
psuY=170;
psuZ=40;

wall=3;
screw=2.8;
earsX=10;
earsY=40;

zBlocker=6;

$fn=32;

module screwSlot(radius, length, height) {
  translate([0,-(length+radius)/2,0]) hull() {
		cylinder(r=radius, h=height);
		translate([0,length,0]) cylinder(r=radius, h=height);
	}
}

module psuHolder() {
	rotate([90,0,0]) difference() {
		union() {
			cube([psuX+2*(wall+earsX), earsY+wall, wall]);
			translate([earsX, 0, 0]) cube([psuX+2*wall, earsY+wall, psuZ+wall]);
		}
		translate([earsX+wall,wall,-wall]) cube([psuX, earsY+wall, psuZ+wall]);
		translate([earsX+wall,-wall,-wall]) cube([psuX, earsY+wall, psuZ-wall-zBlocker]);

		translate([earsX/2, earsY/2+screw/2, -wall]) screwSlot(screw/2, earsY-4*wall, 3*wall);
		translate([earsX+psuX+2*wall+earsX/2, earsY/2+screw/2, -wall]) screwSlot(screw/2, earsY-4*wall, 3*wall);
	}
}

psuHolder();

// uncomment the following line if you want to print both needed parts in one go
//translate([0, wall*2 + psuZ,0]) psuHolder();