From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 9 May 2025 14:29:45 +0000 (+0100)
Subject: toolbox-inserts: RatchetHandle, annotations etc.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=commitdiff_plain;h=c4b9ec8e9bfc34403cd4e2e3363adc6e629833a5;p=reprap-play.git

toolbox-inserts: RatchetHandle, annotations etc.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---

diff --git a/toolbox-inserts.scad b/toolbox-inserts.scad
index 50c0a39..0be9da2 100644
--- a/toolbox-inserts.scad
+++ b/toolbox-inserts.scad
@@ -353,32 +353,43 @@ module AtPlateFixings() {
 //---------- RatchetHandle ----------
 
 module RatchetHandlePositive() { ////toplevel
-  xhe = -87.0 + 0.5;
-  xs1 = -40.0;
-  xh1 = 14.0;
-  head_y = 12.1 + 0.5;
-  head_d0 = 26.5;
-  head_xmid = (xs1 + xhe)/2;
+  xhe = -87.0 + 0.5;    // head, most distant end
+  xh1 = -40.0;          // head, near end (where it meets shaft)
+  head_y = 12.1 + 0.5;  // head, thickness
+  head_d0 = 26.5;       // head, diameter of nominal circle (width laid down)
+  xg1 = 14.0;           // grip, widest point (near inner end of grip)
 
+  // calculated
+  head_xmid = (xh1 + xhe)/2;
+
+  // grip, main part
   hull(){
-    translate([xh1, 0,0])
+    // fat stubby oval at widest point
+    translate([xg1, 0,0])
       linextr_x_yz(0, 0.1)
       rotate(90)
       oval([ 21.8, 18.1 ]/2);
 
+    // tall oval at far end
     translate([63.1 + 0.5, 0,0])
       linextr_x_yz(-0.1, 0)
       rotate(90)
       oval([ 23.5, 16.8 ]/2);
   }
-  linextr_x_yz(0, xh1)
+
+  // grip, circular part at inner end
+  linextr_x_yz(0, xg1)
     circle(r = 19.0/2);
+
+  // shaft
   linextr_x_yz(head_xmid, 1)
     circle(r = 10.0 /2);
+
+  // head, main part (oval)
   linextr_y_xz(-head_y/2, head_y/2) {
     rotate(180)
     translate([ head_xmid, 0,0 ])
-    oval([ xs1 - xhe, head_d0 ]/2);
+    oval([ xh1 - xhe, head_d0 ]/2);
   }
 }