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@@ -48,7 +48,8 @@ BOSS_H = 2.0; // standoff boss height; PCB bottom sits flush on boss t
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/* [Locating Studs] */
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STUD_CLEAR = 0.10; // radial clearance per side — close (non-interference) fit in SLA resin
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-STUD_H = PCB_T + 1.0; // stud height above boss top: through PCB + 1 mm proud
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+STUD_H = PCB_T + 1.0; // stud cylinder height above boss top: through PCB + 1 mm proud
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+STUD_R = (SCREW_D - 2*STUD_CLEAR) / 2; // stud pin radius (= cylinder + dome radius)
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/* [PCB Standoff Positions — relative to PCB origin] */
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PCB_BOSS_X1 = 2.5;
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@@ -107,8 +108,11 @@ module pcb_boss(px, py, stud=false) {
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cylinder(d=SCREW_D * 0.7, h=BOSS_H + 0.2, $fn=18);
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}
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if (stud)
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- translate([0, 0, BOSS_H])
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- cylinder(d=SCREW_D - 2*STUD_CLEAR, h=STUD_H, $fn=24);
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+ translate([0, 0, BOSS_H]) {
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+ cylinder(r=STUD_R, h=STUD_H, $fn=24);
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+ translate([0, 0, STUD_H])
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+ sphere(r=STUD_R, $fn=24);
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+ }
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}
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}
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