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make standoffs slightly shorter to reduce rattling against the outer lip

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ewin 2025-10-18 16:19:50 -04:00
parent 8e365bfdf1
commit 5c443f9bef
Signed by: erin
SSH key fingerprint: SHA256:swjoHhREbZPbWe+gyJNi24d4NAxJSyUIm3fpZj4z3wc
1 changed files with 11 additions and 3 deletions
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14
case/48ish_case.scad
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@ -29,6 +29,14 @@ module shell () {
}
module standoffs () {
// for M2 3x3 standoffs
hole_diameter = 3;
hole_depth = 3 * 1.5;
wall_thickness = 1;
// offsets the top of the standoffs down from where the pcb will actually rest; this allows the screws to actually hold the pcb down against the outer lip of the case and prevent rattling if the pcb is not perfectly flat
standoff_top_face_offset = -0.25;
for (point = [
[17 + 18 * 0, 16.5 + 17 * 0],
[17 + 18 * 2, 16.5 + 17 * 2],
@ -38,9 +46,9 @@ module standoffs () {
[17 + 18 * 8, 16.5 + 17 * 2],
[17 + 18 * 10, 16.5 + 17 * 0],
]) {
translate([point.x, point.y, baseplate_thickness - 0.1]) difference() {
cylinder(h = inner_clearance + .1, d = 5);
translate([0, 0, inner_clearance + .1 - 3 * 1.5]) cylinder(h = 3 * 1.5 + .2, d = 3); // hole inner - adjust for insert size
translate([point.x, point.y, baseplate_thickness - 0.01]) difference() {
cylinder(h = inner_clearance + standoff_top_face_offset + .01, d = hole_diameter + 2*wall_thickness);
translate([0, 0, inner_clearance + standoff_top_face_offset + .1 - hole_depth]) cylinder(h = hole_depth + .02, d = hole_diameter); // hole inner - adjust for insert size
}
}
}