sewing-table: some comments (nfc)

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

diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4
index c2ae19d6712084357c91af1b4b87850e16102fcc..3b628e4b681bd7456ecc93699db15e9c150c8574 100644 (file)
--- a/sewing-table.scad.m4
+++ b/sewing-table.scad.m4
@@ -18,6 +18,8 @@ screw_big_len = 4.0;
 
 round_edge_rad = 2.0;
 
+round_cnr_rad = 10;
+
 interlock_dia = 10;
 interlock_fine = 0.66;
 
@@ -28,6 +30,8 @@ demo_slop = 0.1;
 
 // calculated
 
+TEST = false;
+
 ply_edge_hole_dist = ply_edge_min + ply_hole_dia/2;
 
 echo(str("HOLES IN PLY ctr dist from PLY edge = ", ply_edge_hole_dist));
@@ -61,6 +65,13 @@ module Post(){
        cylinder(r= screw_dia/2, h= ply_th, $fn=20);
       }
     }
+    if (TEST) {
+      tsz = tile_hard_edge_hole_dist - test_edge + 1;
+      translate([0,0, tile_th/2]) {
+       cube([post_dia, tsz*2, tile_th], center=true);
+       cube([tsz*2, post_dia, tile_th], center=true);
+      }
+    }
   }
 }
 
@@ -79,11 +90,23 @@ module TileBase(botleft, topright){
     mirror([0,0,1])
       translate(concat(botleft, [0]))
       cube(concat(size, [tile_th]));
-    translate( concat(botleft_post, [-tile_th])
-              + 0.5 * [ post_dia, post_dia, 0 ] )
-      Commitid_BestCount_M( topright_post-botleft_post
-                           + [-post_dia,-post_dia]
-                           + [0, thehd[1]]);
+    if (!TEST) {
+      translate( concat(botleft_post, [ -tile_th ])
+                + 0.5 * [ post_dia, post_dia, 0 ] )
+       Commitid_BestCount_M( topright_post-botleft_post
+                             + [-post_dia,-post_dia]
+                             + [0, thehd[1]]);
+    }
+    if (TEST) {
+      translate( concat(botleft + [thehd[0], 0], [0]) )
+       Commitid_BestCount([ size[0] - thehd[0]*2, thehd[1] ]);
+      mirror([0,0,1]) {
+       translate(concat(botleft + [test_edge,test_edge], [test_tile_th]))
+         cube(concat(size - [test_edge,test_edge]*2, [tile_th]));
+       translate(concat(botleft_post, [-1]))
+         cube(concat(topright_post-botleft_post, [tile_th+2]));
+      }
+    }
   }
 }
 
@@ -119,12 +142,36 @@ module RoundEdge(left_cnr, right_cnr) {
   }
 }
 
-module RoundLeftCorner(this_cnr, right_cnr) {
+module RoundCornerCut(ci) {
+  // ci should be [this_cnr, right_cnr]
+  // where right_cnr is to the right (ie, anticlockwise)
+  this_cnr = ci[0];
+  right_cnr = ci[1];
+  offr= round_cnr_rad - round_edge_rad;
   INREFFRAME(this_cnr, right_cnr) INREFFRAME_EDGE {
     difference(){
-      sphere(r= round_edge_rad, $fn=60);
-      translate([0,0, -20])
-       cube([20,20,20]);
+      cube(offr*2 - 0.1, center=true);
+      translate([offr, offr, 0])
+       cylinder(center=true, h=20, r= offr);
+    }
+  }
+}
+
+module RoundCornerAdd(ci) {
+  this_cnr = ci[0];
+  right_cnr = ci[1];
+  bigr = round_cnr_rad - round_edge_rad;
+  INREFFRAME(this_cnr, right_cnr) INREFFRAME_EDGE {
+    intersection(){
+      cube(bigr*2 + 0.1, center=true);
+      translate([bigr, bigr, 0])
+       rotate_extrude(convexity=10, $fn=50)
+       translate([bigr, 0])
+       difference(){
+         circle(r= round_edge_rad, $fn=50);
+         mirror([1,1])
+           square([20,20]);
+        }
     }
   }
 }
@@ -150,7 +197,7 @@ module InterlockLobePlan(negative) {
   }
 }
 
-module InterlockEdgePlan(negative, nlobes, length) {
+module InterlockEdgePlan(negative, nlobes, length, dosquare=true) {
   for (lobei = [ 0 : nlobes-1 ]) {
     lobex = (length - thehd[0]*2) * (lobei ? lobei / (nlobes-1) : 0);
     translate([lobex, 0, 0]) {
@@ -158,11 +205,13 @@ module InterlockEdgePlan(negative, nlobes, length) {
     }
   }
 
-  iadj = interlock_sq_adj;
-  slotshorter = negative ? 0 : interlock_fine_lenslop;
-  mirror([0, negative])
-    translate([slotshorter, iadj])
-    square([length - slotshorter*2, interlock_fine + iadj*2]);
+  if (dosquare) {
+    iadj = 0;
+    slotshorter = negative ? -0.1 : interlock_fine_lenslop;
+    mirror([0, negative])
+      translate([slotshorter, iadj])
+      square([length - slotshorter*2, interlock_fine + iadj*2]);
+  }
 }
 
 module InterlockEdge(left_cnr, right_cnr, negative=0, nlobes=2) {
@@ -173,7 +222,8 @@ module InterlockEdge(left_cnr, right_cnr, negative=0, nlobes=2) {
   z1 = -tile_th/2 - protr / interlock_fine_slope;
   z3 = -tile_th/2 + protr / interlock_fine_slope;
 
-  yprotr = negative ? -protr : protr;
+  negsign = negative ? -1 : +1;
+  yprotr = negsign * protr;
 
   INREFFRAME(left_cnr, right_cnr) {
     for (vsect = [ // zs0            zs1      ys0,            ys1
@@ -189,12 +239,12 @@ module InterlockEdge(left_cnr, right_cnr, negative=0, nlobes=2) {
       ysd = ys1-ys0;
       sl = ysd/zsd;
       m = [ [ 1,0,   0,    0 ],
-           [ 0,1, -sl, -ys0 ],
+           [ 0,1, -sl, -ys0 + negsign*interlock_sq_adj ],
            [ 0,0,   1,  zs0 ],
            [ 0,0,   0,    1 ] ];
       multmatrix(m)
        linear_extrude(height=zsd, convexity=10)
-       InterlockEdgePlan(negative, nlobes, length);
+       InterlockEdgePlan(negative, nlobes, length, !!ysd);
     }
   }
 }
@@ -210,14 +260,18 @@ module TestPiece1(){ ////toplevel
            [   0, 0]
            ];
   corners = TestPiece_holes2corners(holes);
+  rcs = [corners[0], corners[1]];
   difference(){
-    TileBase(corners[0], corners[2]);
+    union(){
+      TileBase(corners[0], corners[2]);
+      Posts(holes);
+      RoundEdge(corners[0], corners[1]);
+      RoundEdge(corners[3], corners[0]);
+    }
     InterlockEdge(corners[1], corners[2], 1, nlobes=1);
+    RoundCornerCut(rcs);
   }
-  Posts(holes);
-  RoundEdge(corners[0], corners[1]);
-  RoundEdge(corners[3], corners[0]);
-  RoundLeftCorner(corners[0], corners[1]);
+  RoundCornerAdd(rcs);
 }
 
 module TestPiece2(){ ////toplevel
@@ -240,6 +294,8 @@ module TestDemo(){ ////toplevel
 }
   
 function Rectangle_corners(c0, sz) =
+  // returns the corners of a rectangle from c0 to c0+sz
+  // if sz is positive, the corners are anticlockwise starting with c0
   [ c0 + [ 0,     0     ],
     c0 + [ sz[0], 0     ],
     c0 + [ sz[0], sz[1] ],
@@ -256,15 +312,19 @@ module Tile02(){ ////toplevel
   c0 = -sz;
   c = Rectangle_corners(c0, sz);
   posts = Rectangle_corners2posts(c);
+  rcs = [c[0], c[1]];
   difference(){
-    TileBase(c[0], c[2]);
+    union(){
+      TileBase(c[0], c[2]);
+      Posts(posts);
+      RoundEdge(c[0], c[1]);
+      RoundEdge(c[3], c[0]);
+      InterlockEdge(c[2], c[3], 0);
+    }
     InterlockEdge(c[1], c[2], 1);
+    RoundCornerCut(rcs);
   }
-  Posts(posts);
-  RoundEdge(c[0], c[1]);
-  RoundEdge(c[3], c[0]);
-  RoundLeftCorner(c[0], c[1]);
-  InterlockEdge(c[2], c[3], 0);
+  RoundCornerAdd(rcs);
 }
 
 module Tile12(){ ////toplevel
@@ -272,14 +332,18 @@ module Tile12(){ ////toplevel
   c0 = [-sz[0], 0];
   c = Rectangle_corners(c0, sz);
   posts = Rectangle_corners2posts(c);
+  rcs = [c[2], c[3]];
   difference(){
-    TileBase(c[0], c[2]);
+    union(){
+      TileBase(c[0], c[2]);
+      RoundEdge(c[2], c[3]);
+      RoundEdge(c[3], c[0]);
+      Posts(posts);
+    }
     InterlockEdge(c[0], c[1], 1);
+    RoundCornerCut(rcs);
   }
-  Posts(posts);
-  RoundEdge(c[2], c[3]);
-  RoundEdge(c[3], c[0]);
-  RoundLeftCorner(c[2], c[3]);
+  RoundCornerAdd(rcs);
 }
 
 module Demo(){ ////toplevel