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bracket.scad
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bracket_length = 120.02;
bracket_width_length = 112.78;
bottom_tab_width = 10.19;
bracket_width = 18.29;
bracket_depth = 1.4; // base bracket depth
bracket_reinforce_width = bracket_width * .2;
bracket_reinforce_length = bracket_length * .78;
bracket_reinforce_depth = 2;
bracket_reinforce_offset_x = -6;
bracket_reinforce_offset_y = -5;
bracket_hole_dia = 4.75;
bracket_hole_distance = 107.01;
bracket_bottom_tab_angle_length = (bracket_width - bottom_tab_width) / 2;
screw_mount_width = 9;
screw_mount_depth = 4;
screw_mount_hole_r = 1.55; // m3 bolt
screw_mount_thread_distance_base = 0.5675;
screw_mount_inset_r = 2.9; // m3 bolt head
screw_mount_inset_depth = 2;
screw_mount_caulking = 2;
// Slot for the CF Card
cf_slot_enabled = true;
screw_mount_distance = cf_slot_enabled ? 60.325 : 56.52;
screw_mount_thread_distance = (cf_slot_enabled ? 6.35 : 4.7625) + screw_mount_thread_distance_base + bracket_depth;
screw_mount_length = screw_mount_thread_distance * 1.4 + bracket_depth;
first_mount_x = cf_slot_enabled ? 28.00 : 31.75;
second_mount_x = first_mount_x + screw_mount_distance;
screw_mount_y = cf_slot_enabled ? 5 : 0;
cf_slot_distance = 6.35 + first_mount_x;
cf_slot_width = 47.625;
cf_slot_height = 5;
cf_slot_y = 1;
cf_reinforce_screwmount_depth = 3;
notch_width = 2.79;
notch_length = notch_width;
shiftover_width = 2.79;
shiftover_length = shiftover_width;
top_tab_width = 18.01 + bracket_depth / 3; // had to fudge this
top_tab_length = 11.43;
top_tab_x = 1;
top_tab_y = notch_width;
top_tab_screw_groove_dia = 4.42;
top_tab_screw_groove_fudge = -0.4; // kinda came out looking wrong so I'm faking it a bit here
top_tab_screw_groove_center = 3.18 + top_tab_screw_groove_fudge;
top_tab_screw_groove_distance = 6.35;
top_tab_screw_groove_translate_z = top_tab_length - top_tab_screw_groove_dia / 2 - top_tab_screw_groove_distance;
top_tab_useless_notch_length = 3.05;
top_tab_useless_notch_width = top_tab_screw_groove_distance - top_tab_screw_groove_dia / 2;
top_tab_useless_notch_z = top_tab_length - top_tab_useless_notch_width;
top_tab_useless_notch_y = top_tab_useless_notch_width / 2 + 8.05 - top_tab_useless_notch_length / 2;
top_tab_depth = 3;
module prism(l, w, h){
polyhedron(
points=[[0,0,0], [l,0,0], [l,w,0], [0,w,0], [0,w,h], [l,w,h]],
faces=[[0,1,2,3],[5,4,3,2],[0,4,5,1],[0,3,4],[5,2,1]]
);
}
// top tab
translate([-top_tab_depth + top_tab_x, -top_tab_y, 0]) difference() {
cube([top_tab_depth, top_tab_width, top_tab_length + bracket_depth]);
translate([-.5, -1, top_tab_screw_groove_translate_z + bracket_depth]) {
cube([top_tab_depth + 1, top_tab_screw_groove_center * 2, top_tab_screw_groove_dia]);
translate([1, top_tab_screw_groove_center * 2, top_tab_screw_groove_dia / 2])
rotate([0, 90, 0])
cylinder(r=top_tab_screw_groove_dia / 2, h=top_tab_depth * 2, $fn=20, center=true);
}
translate([-.5, top_tab_useless_notch_y, top_tab_useless_notch_z + bracket_depth]) {
cube([top_tab_depth + 1, top_tab_useless_notch_length, top_tab_useless_notch_width + 1]);
}
}
// screw mounts
module screwmount(x) {
translate([0, -screw_mount_y, 0]) // easier to be explicit here than factor it in the below statement
translate([x - screw_mount_width / 2, bracket_width, -screw_mount_length + bracket_depth])
// cut out the threads
difference() {
union() {
cube([screw_mount_width, screw_mount_depth, screw_mount_length]);
// add just a tiny bit of stuff to make the connection better
difference() {
translate([0, -.5 * screw_mount_caulking, screw_mount_length - screw_mount_caulking * .5])
rotate(a=-45, v=[1, 0, 0]) cube([screw_mount_width, screw_mount_depth, screw_mount_caulking]);
translate([-5, -5, screw_mount_length]) cube([15, 15, 1]);
}
}
translate([screw_mount_width / 2, -2, screw_mount_length - screw_mount_thread_distance])
rotate([0, 90, 90]) cylinder(r=screw_mount_hole_r, h=10, $fn=20);
translate([screw_mount_width / 2, screw_mount_depth - screw_mount_inset_depth + 0.01,
screw_mount_length - screw_mount_thread_distance])
rotate([0, 90, 90])
cylinder(r=screw_mount_inset_r, h=screw_mount_inset_depth, $fn=20);
}
}
screwmount(first_mount_x);
screwmount(second_mount_x);
// reinforce bracket body
translate([
bracket_length / 2 - bracket_reinforce_length / 2 + bracket_reinforce_offset_x,
bracket_width / 2 - bracket_reinforce_width / 2 + bracket_reinforce_offset_y,
-bracket_reinforce_depth])
cube([bracket_reinforce_length, bracket_reinforce_width, bracket_reinforce_depth]);
if (cf_slot_enabled) {
translate([
bracket_length / 2 - bracket_reinforce_length / 2 + bracket_reinforce_offset_x,
bracket_width - bracket_reinforce_width,
-cf_reinforce_screwmount_depth])
cube([bracket_reinforce_length, bracket_reinforce_width, cf_reinforce_screwmount_depth]);
}
// build up the shiftover
translate([0, -shiftover_width, 0]) cube([shiftover_length, shiftover_width + .1, bracket_depth]);
translate([
shiftover_length,
-shiftover_width,
bracket_depth])
rotate([0, 90, 0])
prism(bracket_depth, shiftover_width, shiftover_width);
// Main bracket part
difference() {
// the base bracket
cube([bracket_length, bracket_width, bracket_depth]);
// cf slot if enabled
if (cf_slot_enabled) {
translate([0, -screw_mount_y, 0])
translate([cf_slot_distance, bracket_width - cf_slot_height - cf_slot_y, -bracket_depth / 2])
cube([cf_slot_width, cf_slot_height, bracket_depth * 2]);
}
// shape the tab at the bottom
translate([bracket_width_length - 0.05, -.05, -.5])
cube([bracket_length - bracket_width_length + 0.1, bracket_bottom_tab_angle_length + .1, bracket_depth + 1.05]);
translate([bracket_width_length - 0.05, bracket_bottom_tab_angle_length + bottom_tab_width,-.5])
cube([bracket_length - bracket_width_length + 0.1, bracket_bottom_tab_angle_length + 0.1, bracket_depth + 1]);
// carve out the angles
translate([
bracket_width_length,
bracket_bottom_tab_angle_length - .05,
2])
rotate([0, 90, 0])
rotate([180, 0, 0])
prism(bracket_bottom_tab_angle_length, bracket_bottom_tab_angle_length, bracket_bottom_tab_angle_length + 0.1);
// other side
translate([
bracket_width_length + 0.1,
bracket_bottom_tab_angle_length + bottom_tab_width + .05,
-2])
rotate([0, 90, 0])
rotate([180, 0, 180])
prism(bracket_bottom_tab_angle_length, bracket_bottom_tab_angle_length, bracket_bottom_tab_angle_length + 0.1);
// ornamental hole
translate([bracket_hole_distance, bracket_width / 2, -1.5])
cylinder(r=bracket_hole_dia / 2, h=3, $fn=20);
// notch out the shiftover
translate([-0.95, bracket_width - notch_width, -1])
cube([notch_length + 1, notch_width + .1, bracket_depth + 2]);
translate([
notch_length,
bracket_width - notch_width,
2])
rotate([0, 90, 0])
prism(notch_width, notch_width + .2, notch_width);
}