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// PARAMETERS
// space above hdd available for air flow
cooling_height = 10;
// thickness of the support bar
bar_thickness = 10;
// diameter of thread rod used for support
rod_diameter = 4;
// dimensions of HDDs; not model-specific; current values are fake
hdd_width = 80;
hdd_height = 30;
hdd_length = 100;
// dimensions of the L-shaped rail between front and back
rail_width = 15;
rail_height = rail_width;
rail_thickness = 1;
// dimension of a single hdd tray (hdd + space around)
tray_height = hdd_height + cooling_height + rail_thickness;
tray_width = hdd_width + bar_thickness;
pla_epsilon = 0.1;
// CONSTRUCTION
module nipple(e = 0) {
rotate([0, 180, 0])
cylinder(h = bar_thickness / 4 + e, r1 = bar_thickness / 4 + e, r2 = 0, $fs=0.1);
}
module half() difference() {
union() {
// upper horizontal bar
translate([0, 0, tray_height - bar_thickness])
cube([tray_width / 2, bar_thickness, bar_thickness]);
// vertical bar
cube([bar_thickness/2, bar_thickness, tray_height]);
// lower horizontal bar
cube([bar_thickness/2 + rail_width + pla_epsilon, bar_thickness, bar_thickness]);
// vertical thread bold receiver
translate([0, bar_thickness, tray_height-bar_thickness]) cube([bar_thickness/2, bar_thickness, bar_thickness]);
translate([tray_width/2 - bar_thickness, bar_thickness, tray_height-bar_thickness]) cube([bar_thickness, bar_thickness, bar_thickness]);
// male downward positioning nippel
translate([rail_width, bar_thickness / 2, 0]) nipple();
}
// receiver for rail
translate([bar_thickness/2 - rail_thickness, 0, bar_thickness - rail_thickness]) {
cube([rail_thickness, bar_thickness, rail_height]);
cube([rail_width, bar_thickness, rail_thickness]);
}
// holes for thread rods (horizontal, vertical)
translate([0, bar_thickness / 2, 0])
cylinder(h = tray_height, r = (rod_diameter + pla_epsilon) / 2, $fs=0.1);
translate([0, bar_thickness * 1.5, tray_height - bar_thickness / 2]) rotate([0, 90, 0])
cylinder(h = tray_width / 2, r = (rod_diameter + pla_epsilon) / 2, $fs=0.1);
// female downward positioning nippel
translate([rail_width, bar_thickness / 2, tray_height]) nipple(pla_epsilon);
}
difference() {
union() {
half();
mirror() half();
}
// female leftward positioning nippel
# translate([-tray_width/2, bar_thickness / 2, tray_height - bar_thickness / 2]) rotate([0, 270, 0]) nipple(pla_epsilon);
}
// male rightward positioning nippel
translate([tray_width / 2, bar_thickness / 2, tray_height - bar_thickness / 2]) rotate([0, 270, 0]) nipple();
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