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rotated cross bars to 45deg. added a test file to generate a few sizes of masks

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This commit is contained in:
David Long
2022-09-14 17:00:00 -04:00
parent 8b7092c859
commit 97f1c4c26e
2 changed files with 54 additions and 13 deletions
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34
sbc_case_builder_library.scad
View File

@@ -2420,31 +2420,39 @@ module fan_mask(size, thick, style) {
size == 60 ? 50 :
size == 70 ? 61.9 :
size == 80 ? 71.5 :
size * 0.8;
offset = (size - inner) / 2;
size * 0.8; // Use 80% as default
bar_width = size < 40 ? 2 : 3;
ring_width = size < 40 ? 5 : 4;
screw_offset = (size - inner) / 2;
translate_xy = size * 0.5;
base_ring_size = size * 0.9;
ring_height = thick + 2;
ring_diff_height = ring_height + 2;
translate([0, 0, -1]) difference() {
union() {
// screw holes
translate([offset, offset, 0]) cylinder(d=3, h=thick+2);
translate([size-offset, offset, 0]) cylinder(d=3, h=thick+2);
translate([offset, size-offset, 0]) cylinder(d=3, h=thick+2);
translate([size-offset, size-offset, 0]) cylinder(d=3, h=thick+2);
translate([screw_offset, screw_offset, 0]) cylinder(d=3, h=thick+2);
translate([size-screw_offset, screw_offset, 0]) cylinder(d=3, h=thick+2);
translate([screw_offset, size-screw_offset, 0]) cylinder(d=3, h=thick+2);
translate([size-screw_offset, size-screw_offset, 0]) cylinder(d=3, h=thick+2);
// fan grates
translate_xy = size * 0.5;
base_ring_size = size * 0.9;
ring_height = thick + 2;
ring_diff_height = ring_height + 2;
for(i=[0:8:inner]) {
difference() {
translate([translate_xy, translate_xy, 0]) cylinder(d=base_ring_size - i, h=ring_height);
translate([translate_xy, translate_xy, -1]) cylinder(d=base_ring_size - i - 4, h=ring_diff_height);
translate([translate_xy, translate_xy, -1]) cylinder(d=base_ring_size - i - ring_width, h=ring_diff_height);
}
}
}
// cross bars
translate([0, (size*0.5)-1.5, -1]) cube([size, 3, 12]);
translate([(size*0.5)-1.5,0, -1]) cube([3, size, 12]);
// NOTE: The math could be better here to figure out the bar's offset, but it works
// okay until you get up to a bar width of 6mm.
bar_offset = inner / 7;
translate([sqrt((bar_width*bar_width)/2) + bar_offset, bar_offset, -1]) rotate([0, 0, 45]) cube([size, bar_width, 12]);
translate([bar_offset, -sqrt((bar_width*bar_width)/2)+size - bar_offset, -1]) rotate([0, 0, -45]) cube([size, bar_width, 12]);
}
}
}

33
tests/fan_mask.scad Normal file
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@@ -0,0 +1,33 @@
use <../sbc_case_builder_library.scad>;
// 30mm Mask Solid
fan_mask(30, 2, 2);
// // 30mm Mask Punchout
translate([0, 40, 0])
difference() {
cube([30, 30, 2]);
fan_mask(30, 2, 2);
}
// 40mm Mask Solid
translate([40, 0, 0])
fan_mask(40, 2, 2);
// // 40mm Mask Punchout
translate([40, 50, 0])
difference() {
cube([40, 40, 2]);
fan_mask(40, 2, 2);
}
// 80mm Mask Solid
translate([90, 0, 0])
fan_mask(80, 2, 2);
// 80mm Mask Punchout
translate([90, 90, 0])
difference() {
cube([80, 80, 2]);
fan_mask(80, 2, 2);
}