mcopy/scad/jk_extras.scad

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include <common.scad>;
IN = 25.4;
/**
* Parametric measurement bar to attach to rails
**/
module measurement_bar (X = 20 * IN, Y = 16.4, Z = 3, BOLT = 4, BOLT_OFFSET = (3/8) * IN, PROJ_ZERO = 43) {
$fn = 50;
difference () {
rounded_cube([X, Y, Z], d = 5, center = true);
translate([(X / 2) - BOLT_OFFSET, 0, 0]) cylinder(r = BOLT/2, h = Z + 1, center = true);
translate([-(X / 2) + BOLT_OFFSET, 0, 0]) cylinder(r = BOLT/2, h = Z + 1, center = true);
translate([(X / 2) - PROJ_ZERO, -(Y / 2) + (5 / 2), 0]) cube([0.2, 5, Z + 1], center = true);
}
}
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projection() {
difference () {
measurement_bar();
translate([-11 * IN, 0, 0]) cube([20 * IN, 16.5, 4], center = true);
translate([11 * IN, 0, 0]) cube([20 * IN, 16.5, 4], center = true);
}
}