X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=sewing-table.scad.m4;h=3311bc377df2679a7a1ed9197e92eb31f5342752;hb=8488c936f3033d8081bab504e245f674277be4d5;hp=e8f6b7a7c68a4e79ee2c6310a0a7200708d48609;hpb=e21fc4e825b97f960748962465d8fef8f51fa6df;p=reprap-play.git diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4 index e8f6b7a..3311bc3 100644 --- a/sewing-table.scad.m4 +++ b/sewing-table.scad.m4 @@ -1,6 +1,7 @@ // -*- C -*- include +include ply_th = 18; ply_hole_dia = 15; @@ -23,14 +24,25 @@ interlock_dia = 10; ply_edge_hole_dist = ply_edge_min + ply_hole_dia/2; -echo(str("HOLES IN PLY ctr dist from edge = ", ply_edge_hole_dist)); +echo(str("HOLES IN PLY ctr dist from PLY edge = ", ply_edge_hole_dist)); hole_slop = (ply_hole_dia - post_dia)/2; tile_hard_edge_hole_dist = ply_edge_hole_dist + hole_slop; + +echo(str("HOLES IN PLY ctr dist from TILE HARD edge = ", + tile_hard_edge_hole_dist)); + +echo(str("HOLES IN PLY ctr dist from TILE ROUND edge = ", + tile_hard_edge_hole_dist + round_edge_rad)); + thehd = [ tile_hard_edge_hole_dist, tile_hard_edge_hole_dist ]; +thehd_tr = thehd; +thehd_tl = [ -thehd_tr[0], thehd_tr[1] ]; +thehd_bl = -thehd_tr; +thehd_br = -thehd_tl; interlock_rad = interlock_dia/2; -interlock_negative_rad = interlock_rad + 0.25; +interlock_negative_rad = interlock_rad + 0.125; module Post(){ mirror([0,0,1]) { @@ -46,20 +58,28 @@ module Post(){ module Posts(posts) { for (p= posts) { - translate([p[0], p[1], 0]) + translate(concat(p, [0])) Post(); } } -module TileBase(botleft_post, topright_post){ - botleft = botleft_post - thehd; - size = topright_post - botleft_post + thehd * 2; - mirror([0,0,1]) - translate([botleft[0], botleft[1], 0]) - cube([size[0], size[1], tile_th]); +module TileBase(botleft, topright){ + size = topright - botleft; + botleft_post = botleft + thehd_tr; + topright_post = topright + thehd_bl; + difference(){ + 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]]); + } } -m4_dnl INREFFRAME(left_post, right_post, morevars) { body; } +m4_dnl INREFFRAME(left_cnr, right_cnr, morevars) { body; } m4_define(`INREFFRAME',` length_vec = ($2) - ($1); length = dist2d([0,0], length_vec); @@ -73,27 +93,26 @@ m4_define(`INREFFRAME',` multmatrix(m) ') -m4_dnl INREFFRAME(left_post, right_post, morevars) +m4_dnl INREFFRAME(left_cnr, right_cnr, morevars) m4_dnl INREFFRAME_EDGE { body; } m4_define(`INREFFRAME_EDGE',` - translate([-thehd[1], -thehd[0], -round_edge_rad]) + translate([0,0, -round_edge_rad]) ') -module RoundEdge(left_post, right_post) { - INREFFRAME(left_post, right_post, - `tlength = length + thehd[1] * 2;') m4_dnl ' +module RoundEdge(left_cnr, right_cnr) { + INREFFRAME(left_cnr, right_cnr) INREFFRAME_EDGE { difference(){ rotate([0,90,0]) - cylinder(r= round_edge_rad, h= tlength, $fn=50); + cylinder(r= round_edge_rad, h= length, $fn=50); translate([-1, 0, -20]) - cube([tlength+2, 20, 20]); + cube([length+2, 20, 20]); } } } -module RoundLeftCorner(this_post, right_post) { - INREFFRAME(this_post, right_post) INREFFRAME_EDGE { +module RoundLeftCorner(this_cnr, right_cnr) { + INREFFRAME(this_cnr, right_cnr) INREFFRAME_EDGE { difference(){ sphere(r= round_edge_rad, $fn=60); translate([0,0, -20]) @@ -102,34 +121,138 @@ module RoundLeftCorner(this_post, right_post) { } } -module InterlockCore(r) { - translate([0, -thehd[0], 1]){ +module InterlockLobePlan(r, ymir) { + dx = sqrt(3) * r; + $fn= 80; + translate([thehd[0], 0]){ + mirror([0,ymir,0]){ + circle(r=r); + difference(){ + translate([-dx, -0.1]) + square([ dx*2, r/2 + 0.1 ]); + for (xi = [-1, 1]) { + translate([ xi*dx, r ]) + circle(r=r); + } + } + } + } +} + +module InterlockLobeCore(negative=0) { + r = negative ? interlock_negative_rad : interlock_rad; + plusth = negative * 1.0; + ymir = negative ? 0 : 1; + translate([0, 0, plusth]){ mirror([0,0,1]){ - linear_extrude(height=tile_th+2){ - circle(r=r, $fn=40); + linear_extrude(height=tile_th+plusth*2, convexity=10){ + InterlockLobePlan(r, ymir); } } } } -module InterlockNegative(this_post, right_post) { - INREFFRAME(this_post, right_post) - InterlockCore(interlock_negative_rad); +module InterlockLobe(this_cnr, right_cnr, negative=0) { + INREFFRAME(this_cnr, right_cnr) + InterlockLobeCore(negative); +} + +module InterlockEdge(left_cnr, right_cnr, negative=0, nlobes=2) { + INREFFRAME(left_cnr, right_cnr) { + for (lobei = [ 0 : nlobes-1 ]) { + lobex = (length - thehd[0]*2) * (lobei ? lobei / (nlobes-1) : 0); + translate([lobex, 0, 0]) + InterlockLobeCore(negative); + } + } } -module TestPiece1(){ +function TestPiece_holes2corners(holes) = + [ holes[0] + thehd_bl, + holes[1] + thehd_br, + holes[1] + thehd_tr, + holes[0] + thehd_tl ]; + +module TestPiece1(){ ////toplevel holes = [ [-100, 0], [ 0, 0] ]; + corners = TestPiece_holes2corners(holes); difference(){ - TileBase(holes[0], holes[1]); - InterlockNegative(holes[1], holes[1] + [0,1]); - + TileBase(corners[0], corners[2]); + InterlockLobe(corners[1], corners[2], 1); } Posts(holes); - RoundEdge(holes[0], holes[1]); - RoundEdge(holes[0] + [ 0, 0.1 ], holes[0]); - RoundLeftCorner(holes[0], holes[1]); + RoundEdge(corners[0], corners[1]); + RoundEdge(corners[3], corners[0]); + RoundLeftCorner(corners[0], corners[1]); } -TestPiece1(); +module TestPiece2(){ ////toplevel + holes = [ [ 0, 0], + [ 50, 0] + ]; + corners = TestPiece_holes2corners(holes); + TileBase(corners[0], corners[2]); + Posts(holes); + RoundEdge(corners[0], corners[1]); + InterlockLobe(corners[3], corners[0]); +} + +module TestDemo(){ ////toplevel + translate([ -thehd[0], 0 ]) + color("blue") + TestPiece1(); + translate([ +thehd[0], 0 ]) + TestPiece2(); +} + +function Rectangle_corners(c0, sz) = + [ c0 + [ 0, 0 ], + c0 + [ sz[0], 0 ], + c0 + [ sz[0], sz[1] ], + c0 + [ 0, sz[1] ] ]; + +function Rectangle_corners2posts(c) = + [ c[0] + thehd_tr, + c[1] + thehd_tl, + c[2] + thehd_bl, + c[3] + thehd_br ]; + +module Tile02(){ ////toplevel + sz = [100,170]; + c0 = -sz; + c = Rectangle_corners(c0, sz); + posts = Rectangle_corners2posts(c); + difference(){ + TileBase(c[0], c[2]); + } + Posts(posts); + RoundEdge(c[0], c[1]); + RoundEdge(c[3], c[0]); + RoundLeftCorner(c[0], c[1]); + InterlockEdge(c[2], c[3], 0, 2); +} + +module Tile12(){ ////toplevel + sz = [100,250]; + c0 = [-sz[0], 0]; + c = Rectangle_corners(c0, sz); + posts = Rectangle_corners2posts(c); + difference(){ + TileBase(c[0], c[2]); + } + Posts(posts); + RoundEdge(c[2], c[3]); + RoundEdge(c[3], c[0]); + RoundLeftCorner(c[2], c[3]); +} + +module Demo(){ ////toplevel + color("blue") Tile12(); + color("red") Tile02(); +} + +//TestPiece1(); +//TestPiece2(); +//Demo();