1 files changed, 68 insertions, 0 deletions
diff --git a/enclosure/rails/openstep_base.scad b/enclosure/rails/openstep_base.scad
new file mode 100644
index 0000000..aaa47db
--- /dev/null
+++ b/enclosure/rails/openstep_base.scad
@@ -0,0 +1,68 @@
+eps=0.01;
+
+nut_dia = 5.3;
+nut_depth=5.5;
+
+module nut_base(w=10, o) {
+    difference() {
+        cylinder(d=w, h=nut_depth+o);
+        translate([0, 0, o-eps]) cylinder(d=nut_dia, h=nut_depth+2*eps);
+    }
+}
+
+module raspi_holder(w, h, x=4) {
+    difference() {
+        union() {
+            cube([50+w, 50+w, h]);
+            
+            translate([w/2, w/2, 0]) union() {
+                nut_base(o=h);
+                translate([50, 0, 0]) {
+                    nut_base(o=h);
+                    translate([0, 50, 0]) nut_base(o=h);
+                }
+                translate([0, 50, 0]) nut_base(o=h);
+            }
+        }
+        translate([w, w, -eps]) cube([50-w, 50-w, h+2*eps]);
+        
+        
+        translate([w/2, w/2, -eps]) {
+            cylinder(d=x, h=h+2*eps);
+            translate([50, 0, 0]) {
+                cylinder(d=x, h=h+2*eps);
+                translate([0, 50, 0]) cylinder(d=x, h=h+2*eps);
+            }
+            translate([0, 50, 0]) cylinder(d=x, h=h+2*eps);
+        }
+    }
+}
+
+module rev_nut_base(w=10, h=5, a=45, x=4, th=7, tw=10) {
+    rotate([0, 0, a])
+    translate([-w/2, -w, 0]) difference() {
+        union() {
+            cube([w, w, h]);
+            translate([w/2, w, 0]) cylinder(d=tw, h=th);
+        }
+        translate([w/2, w, -eps]) {
+            cylinder(d=nut_dia, h=nut_depth+2*eps);
+            cylinder(d=x, h=th+2*eps);
+        }
+    }
+}
+
+module raspi_adapter(w=10, h=5, s=30) {
+    translate([-(50+w)/2, -(50+w)/2, 0]) raspi_holder(w=w, h=h);
+    difference() {
+        union() {
+            translate([-s, -(50+w)/2-5, 0]) rev_nut_base(a=-30-180);
+            translate([ s, -(50+w)/2-5, 0]) rev_nut_base(a=-60-90);
+            translate([-s,  (50+w)/2+5, 0]) rev_nut_base(a=-60+90);
+            translate([ s,  (50+w)/2+5, 0]) rev_nut_base(a=-30);
+        }
+        cube([60, 60, 100], center=true);
+    }
+}
+
+raspi_adapter($fn=25);