// Retraction 30mm thinwalled square with holes
// Using the nozzle width specification to set the wall widths
// Used to test and adjust retraction.
// Blobbing at the start of the holes means too little retraction
// lightness on the trailing side of the holes means retraction speed is too slow. material return to nozzle is low.
//
//
include <MCAD/boxes.scad>;


my_h=10.0; // 5mm high
my_layer=.2; //
my_l1=30.0; // 50 125 is big
my_w1=33.0;
nozzle_size=0.45; // your nozzle size
wall=nozzle_size;
my_f=12; // 3 facets make a triangle 12 something else




//base
//translate([0,0,my_layer/2]) {
//	cube(size=[my_l1, my_l1, my_layer*2], center=true);
//}


// large
translate([0,0,my_h/2]) {
  difference() { $fn=30;
        roundedBox([my_l1 ,my_l1,my_h],3, true);
        roundedBox([my_l1-(wall*2),my_l1-(wall*2),my_h],2.5, true);
		//cube(size=[my_l1, my_l1, my_h], center=true);
		//# cube(size=[my_l1-wall*2, my_l1-wall*2, my_h], center=true);
		//holes
      translate([0,5,0])
			rotate([0,90,0]) 
				cylinder(r=my_h/3, h=my_l1*2, center=true);
		mirror([0,1,0]) translate([10,5,0])
			rotate([0,90,0])
				cylinder(r=my_h/3, h=my_l1*2, center=true);



	}
}