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Annotate and tweak retractable.scad #12

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Annotate and tweak retractable.scad #12

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f430fd9
Annotate each piece of retractable.scad
Jul 10, 2013
76b07f6
retractable.scad: Minor refactor to clarify tunnel size changes to fo…
Jul 10, 2013
24bd4fa
retractable.scad: use spacings that better fit a 2mm allen wrench
Jul 10, 2013
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31 changes: 22 additions & 9 deletions retractable.scad
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Original file line number Diff line number Diff line change
Expand Up @@ -2,10 +2,13 @@ include <configuration.scad>;

use <microswitch.scad>;

height = 26;
height2 = 26;
tunnel = 2.4;
face_offset = 4;
height = 26; // Main half-round extrusion height.
height2 = 26; // Main rectangular extrusion height.
// A 2.0mm allen wrench (between flats) has a 2.22mm width between corners.
hole_dia = 2.22; // Allen wrench distance between corners. Extra_radius will be added.
tunnel_extra = 0.0; // Extra width in slot.
tunnel = hole_dia+tunnel_extra; // Allen wrench slot width.
face_offset = 4; // Offset from allen wrench to flat face for microswitch.

module foot() {
difference() {
Expand All @@ -31,15 +34,19 @@ module foot() {
module retractable() {
difference() {
union() {
// Main body extrusion: vertical cylinder around allen wrench.
translate([0, 0, height/2])
cylinder(r=6, h=height, center=true, $fn=32);
// Rectanglar extrusion for mounting microswitch.
translate([0, -3, height/2])
cube([12, 6, height], center=true);
// Lower part on the left.
// Lower part on the left: vertical cylinder.
translate([-6, 0, height2/2])
cylinder(r=6, h=height2, center=true, $fn=32);
// Rectanglar extrusion to connect two vertical cylinders.
translate([-3, 0, height2/2])
cube([6, 12, height2], center=true);
// Rectangular extrusion near face for mounting microswitch.
translate([-3, -3, height2/2])
cube([18, 6, height2], center=true);
// Feet for vertical M3 screw attachment.
Expand All @@ -48,16 +55,21 @@ module retractable() {
scale([1, -1, 1]) foot();
}
}
// Taper left edge.
translate([-19, 0, height/2+6]) rotate([0, 15, 0])
cube([20, 20, height], center=true);
cylinder(r=tunnel/2+extra_radius, h=3*height, center=true, $fn=12);
// Vertical hole for allen wrench.
cylinder(r=hole_dia/2+extra_radius, h=3*height, center=true, $fn=12);
// Slot for allen wrench.
translate([0, -6, height/2+12])
cube([tunnel-0.5, 12, height], center=true);
rotate([0, 0, 30]) translate([0, -6, height/2+22])
cube([tunnel, 12, height], center=true);
// Safety needle spring.
// Cutout at top for allen wrench to rotate and latch.
rotate([0, 0, 30]) translate([0, -6, height/2+22])
cube([hole_dia+2*extra_radius, 12, height], center=true);
// Safety needle screw mounting hole.
translate([-4.5, 0, height-11]) rotate([90, 0, 0])
cylinder(r=2.5/2, h=40, center=true, $fn=12);
// Hole for safety needle.
translate([-4, 0, height-2]) rotate([90, 0, 0])
cylinder(r=1/2, h=40, center=true, $fn=12);
// Effector screw heads.
Expand All @@ -72,6 +84,7 @@ module retractable() {
% microswitch();
for (x = [-9.5/2, 9.5/2]) {
translate([x, 0, 0]) rotate([90, 0, 0])
// Cylinder mounting holes.
cylinder(r=2.5/2, h=40, center=true, $fn=12);
}
}
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