greatfet

commit f0a37dff1fa582ca0ea34388ab9444647e0fc4dc
Author: Paco Esteban <paco@e1e0.net>
Date:   Sat, 20 Nov 2021 17:37:56 +0100

bench support for the GreatFET

Diffstat:
A
greatfet_support.scad
 | 
103
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 103 insertions(+), 0 deletions(-)
diff --git a/greatfet_support.scad b/greatfet_support.scad
@@ -0,0 +1,103 @@
+holeSpacingH = 60.96;
+holeFrontSpacingV = 40.64;
+holeBackSpacingV = 45.72;
+
+frameEdgePaddingH = 14;
+frameEdgePaddingV = 8;
+
+frameSize = [holeSpacingH + frameEdgePaddingH*2, holeBackSpacingV + frameEdgePaddingV*2];
+frameThickness = 2;
+frameReinforcementHeight = 4;
+frameReinforcementThickness = 1.5;
+frameWidth = 8;
+
+mountLength = 15;
+mountDia = 7;
+mountHoleDia = 3.5;
+mountColumns = [0, holeSpacingH, holeSpacingH];
+
+union() {
+  frame();
+  mounts();
+}
+
+module mounts() {
+  union() {
+    linear_extrude(mountLength) difference() {
+      mountOutlines(mountDia);
+      mountOutlines(mountHoleDia);
+    }
+    mountFlanges();
+  }
+}
+
+module frame() {
+  linear_extrude(frameThickness) frameOutline();
+  linear_extrude(frameReinforcementHeight) frameRim(frameReinforcementThickness);
+}
+
+module frameOutline() {
+  union() {
+    frameRim(frameWidth);
+    mountOutlines(mountDia);
+    frameFlanges(mountDia);
+  }
+}
+
+module frameReinforcementOutline() {
+  difference() {
+    frameRim(frameReinforcementThickness);
+    mountOutlines(mountHoleDia);
+  }
+}
+
+module frameRim(width) {
+  difference() {
+    offset(r=width/2) square(size=frameSize, center=true);
+    offset(r=-width/2) square(size=frameSize, center=true);
+  }
+}
+
+module mountOutline(d) {
+  circle(d/2, $fn=32);
+}
+
+module mountOutlines(d) {
+  // front
+  translate([-holeSpacingH/2, holeFrontSpacingV/2]) mountOutline(d);
+  translate([-holeSpacingH/2, -holeFrontSpacingV/2]) mountOutline(d);
+  // back
+  translate([holeSpacingH/2, holeBackSpacingV/2]) mountOutline(d);
+  translate([holeSpacingH/2, -holeBackSpacingV/2]) mountOutline(d);
+}
+
+module frameFlanges(length) {
+  translate([-holeSpacingH/2-mountDia/2, holeFrontSpacingV/2]) square(size=[length, frameWidth]);
+  translate([-holeSpacingH/2-mountDia/2, -holeFrontSpacingV/2-mountDia-frameThickness/2]) square(size=[length, frameWidth]);
+  translate([holeSpacingH/2-mountDia/2, holeBackSpacingV/2]) square(size=[length, frameWidth]);
+  translate([holeSpacingH/2-mountDia/2, -holeBackSpacingV/2-mountDia-frameThickness/2]) square(size=[length, frameWidth]);
+}
+
+module mountFlange(edgePadding) {
+  translate([-frameReinforcementThickness/2, 0]) rotate([90, 0, 90])
+    linear_extrude(frameReinforcementThickness) polygon(points=[
+    [mountHoleDia/2, 0],
+    [edgePadding, 0],
+    [edgePadding, frameReinforcementHeight],
+    [mountHoleDia/2, mountLength]]);
+}
+
+module flangeFront() {
+  translate([-holeSpacingH/2, holeFrontSpacingV/2+frameReinforcementThickness]) mountFlange(mountDia+(holeBackSpacingV-holeFrontSpacingV)/2);
+}
+
+module flangeBack() {
+  translate([holeSpacingH/2, holeBackSpacingV/2+frameReinforcementThickness]) mountFlange(mountDia);
+}
+
+module mountFlanges() {
+  flangeFront();
+  mirror([0,1,0]) flangeFront();
+  flangeBack();
+  mirror([0,1,0]) flangeBack();
+}