X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=reprap-play.git;a=blobdiff_plain;f=sewing-table.scad.m4;h=40ec1be2524399e6d80c9f0546707406d848ed0f;hp=37c2be03e45e5e7a9f4dc7d393bb1b586ce1f639;hb=4982e66d15e9dcc3aec326dfe480cdec31aaaf91;hpb=c269c6014b10f6f699f58155b773ce00d47b7bdf diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4 index 37c2be0..40ec1be 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; @@ -23,11 +24,22 @@ 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 + 0.125; @@ -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]) @@ -102,67 +121,78 @@ module RoundLeftCorner(this_post, right_post) { } } -module InterlockCore(r, plusth, ymir) { +module InterlockLobePlan(r, ymir) { dx = sqrt(3) * r; $fn= 80; - translate([0, -thehd[0], plusth]){ + translate([thehd[0], 0]){ mirror([0,ymir,0]){ - mirror([0,0,1]){ - linear_extrude(height=tile_th+plusth*2, convexity=10){ - 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); - } - } + 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 InterlockNegative(this_post, right_post) { - INREFFRAME(this_post, right_post) - InterlockCore(interlock_negative_rad, 1, 0); +module InterlockLobeCore(r, plusth, ymir) { + translate([0, 0, plusth]){ + mirror([0,0,1]){ + linear_extrude(height=tile_th+plusth*2, convexity=10){ + InterlockLobePlan(r, ymir); + } + } + } } -module Interlock(this_post, right_post) { - INREFFRAME(this_post, right_post) - InterlockCore(interlock_rad, 0, 1); +module InterlockLobe(this_cnr, right_cnr, negative=0) { + INREFFRAME(this_cnr, right_cnr) + InterlockLobeCore(negative ? interlock_negative_rad : interlock_rad, + negative ? 1 : 0, + negative ? 0 : 1); } +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]); } module TestPiece2(){ ////toplevel holes = [ [ 0, 0], [ 50, 0] ]; - TileBase(holes[0], holes[1]); + corners = TestPiece_holes2corners(holes); + TileBase(corners[0], corners[2]); Posts(holes); - RoundEdge(holes[0], holes[1]); - Interlock(holes[0], holes[0] + [0, -1]); + RoundEdge(corners[0], corners[1]); + InterlockLobe(corners[3], corners[0]); } - -module Demo(){ - translate([ -thehd[1], 0 ]) + +module Demo(){ ////toplevel + translate([ -thehd[0], 0 ]) color("blue") TestPiece1(); - translate([ +thehd[1], 0 ]) + translate([ +thehd[0], 0 ]) TestPiece2(); }