From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Mon, 2 Jan 2017 15:30:56 +0000 (+0000)
Subject: sewing-table: Interlock: tongue/groove wip (nfc)
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=commitdiff_plain;h=173a156f03a3d5dfccf04f354a07d2e14f661412

sewing-table: Interlock: tongue/groove wip (nfc)
---

diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4
index 7e6afbf..630d489 100644
--- a/sewing-table.scad.m4
+++ b/sewing-table.scad.m4
@@ -21,6 +21,7 @@ round_edge_rad = 2.0;
 interlock_dia = 10;
 interlock_fine = 0.66;
 
+interlock_fine_slope = 1.0;
 interlock_fine_lenslop = 1.0;
 
 demo_slop = 0.1;
@@ -166,14 +167,21 @@ module InterlockEdgePlan(negative, nlobes, length) {
 
 module InterlockEdge(left_cnr, right_cnr, negative=0, nlobes=2) {
   plusth = negative * 1.0;
+  protr = interlock_fine + interlock_sq_adj;
+
+  z2 = -tile_th/2;
+  z1 = -tile_th/2 - protr / interlock_fine_slope;
+  z3 = -tile_th/2 + protr / interlock_fine_slope;
 
   INREFFRAME(left_cnr, right_cnr) {
-    translate([0, 0, plusth]){
-      mirror([0,0,1]){
-	linear_extrude(height=tile_th+plusth*2, convexity=10){
-	  InterlockEdgePlan(negative, nlobes, length);
-	}
-      }
+    for (vsect = [ // zstart         zend     ystart,      yend
+		  [ -tile_th-plusth, plusth,  0,              0],
+		  //[ z1,              z2,      0, protr],
+		  //[ z2,              z3,      protr, 0],
+		  ]) {
+      translate([0, 0, vsect[0]])
+	linear_extrude(height=vsect[1]-vsect[0], convexity=10)
+	InterlockEdgePlan(negative, nlobes, length);
     }
   }
 }