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

[reprap-play.git] / sewing-table.scad.m4

diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4
index 813e1a24f2175282163e7a3b2620aa2952ed318a..b09d59a53d0a615d63453e7c245081fb62c294a5 100644 (file)
--- a/sewing-table.scad.m4
+++ b/sewing-table.scad.m4
@@ -19,8 +19,9 @@ screw_big_len = 4.0;
 round_edge_rad = 2.0;
 
 interlock_dia = 10;
-interlock_fine = 1.0;
+interlock_fine = 0.66;
 
+interlock_fine_slope = 1.0;
 interlock_fine_lenslop = 1.0;
 
 demo_slop = 0.1;
@@ -49,6 +50,8 @@ thehd_br = -thehd_tl;
 interlock_rad = interlock_dia/2;
 interlock_negative_rad = interlock_rad + 0.125;
 
+interlock_sq_adj = 0.2; // arbitrary
+
 module Post(){
   mirror([0,0,1]) {
     difference(){
@@ -148,8 +151,6 @@ module InterlockLobePlan(negative) {
 }
 
 module InterlockEdgePlan(negative, nlobes, length) {
-  iadj = 0.1;
-
   for (lobei = [ 0 : nlobes-1 ]) {
     lobex = (length - thehd[0]*2) * (lobei ? lobei / (nlobes-1) : 0);
     translate([lobex, 0, 0]) {
@@ -157,22 +158,39 @@ module InterlockEdgePlan(negative, nlobes, length) {
     }
   }
 
+  iadj = interlock_sq_adj;
   slotshorter = negative ? 0 : interlock_fine_lenslop;
-  mirror([0, negative, 1])
+  mirror([0, negative])
     translate([slotshorter, iadj])
     square([length - slotshorter*2, interlock_fine + iadj*2]);
 }
 
 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 = [ // zs0            zs1      ys0,            ys1
+                 [ -tile_th-plusth, plusth,  0,              0],
+                 [ z1,              z2,      0, protr],
+                 [ z2,              z3,      protr, 0],
+                 ]) {
+      zs0 = vsect[0];
+      zs1 = vsect[1];
+      zsd = zs1-zs0;
+      ys0 = vsect[2];
+      ys1 = vsect[2];
+      ysd = ys1-ys0;
+      multmatrix([ [ 1,0,0,0 ],
+                  [ 0,1,0,0 ],
+                  [ 0,0,1,zs0 ],
+                  [ 0,0,0,1 ] ])
+       linear_extrude(height=zsd, convexity=10)
+       InterlockEdgePlan(negative, nlobes, length);
     }
   }
 }
@@ -236,12 +254,13 @@ module Tile02(){ ////toplevel
   posts = Rectangle_corners2posts(c);
   difference(){
     TileBase(c[0], c[2]);
+    InterlockEdge(c[1], c[2], 1);
   }
   Posts(posts);
   RoundEdge(c[0], c[1]);
   RoundEdge(c[3], c[0]);
   RoundLeftCorner(c[0], c[1]);
-  InterlockEdge(c[2], c[3], 0, 2);
+  InterlockEdge(c[2], c[3], 0);
 }
 
 module Tile12(){ ////toplevel
@@ -251,6 +270,7 @@ module Tile12(){ ////toplevel
   posts = Rectangle_corners2posts(c);
   difference(){
     TileBase(c[0], c[2]);
+    InterlockEdge(c[0], c[1], 1);
   }
   Posts(posts);
   RoundEdge(c[2], c[3]);