Bitbeam - 3D Projection

bitbeam-full-3d.scad

// Each bitbeam is 5/16 inches wide. It's length is determined by the number of holes.
// Each hole is 8mm apart from each other
// The center of holes are 4mm way from each side of the beam
// The holes are 4.8 mm in diameter.


beam_width = 7.9375;   // 5/16 inches


module beam(number_of_holes) {
    beam_length = number_of_holes * 8;
        difference(){
            // Draw the beam...
            cube([beam_length,beam_width,beam_width]);
    
            // Cut the holes...
            // For small radius circles, I'm using my make-it-big-then-scale-it-down trick
            // to improve the visible rotundity of the circles.
            for (x=[40 : 80 : beam_length*10]) {
                scale(.10)
                translate([x,40,-10])
		cylinder(r=24, h=100);
            }
            for (x=[40 : 80 : beam_length*10]) {
		rotate([90,0,0])
                scale(.10)
                translate([x,40,-90])
		cylinder(r=24, h=100);
            }
        }
}


beam(13);