connector: improve thread holes

- add epsilon to prevent precise surface overlap (improves rendering)
- add sink hole for nut and screw head

1 files changed, 17 insertions, 0 deletions

diff --git a/screw_hole.scad b/screw_hole.scad
new file mode 100644
index 0000000..aebaa0e
--- /dev/null
+++ b/screw_hole.scad
@@ -0,0 +1,17 @@
+include <parameters.scad>
+
+module screw_hole(
+  screw_diameter = rod_diameter,
+  nut_diameter = nut_diameter,
+ nut_depth=0
+) {
+  translate([0, 0, nut_depth - epsilon]) {
+    // thread
+    cylinder(h=large, r=screw_diameter / 2 + pla_epsilon, $fs=0.1);
+
+    // nut or screw head
+    mirror([0, 0, 1]) cylinder(h=large, r=nut_diameter / 2 + pla_epsilon, $fs=0.1);
+  }
+}
+
+screw_hole(nut_depth=1);
\ No newline at end of file