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=5a6aec036ea8e4c6841387de5f815e4e600e37e6;hp=164350ee563ff188d2ac929790ca6d6f42fd9d76;hb=d966533a620dcfd35e9aebd199212fcbba6ba83c;hpb=6a2a373e4d5737ae1dc1f9d53f929a0ef19ed3eb diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4 index 164350e..5a6aec0 100644 --- a/sewing-table.scad.m4 +++ b/sewing-table.scad.m4 @@ -19,20 +19,39 @@ screw_big_len = 4.0; 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; // calculated 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; +interlock_sq_adj = 0.2; // arbitrary + module Post(){ mirror([0,0,1]) { difference(){ @@ -47,26 +66,28 @@ 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; +module TileBase(botleft, topright){ + size = topright - botleft; + botleft_post = botleft + thehd_tr; + topright_post = topright + thehd_bl; difference(){ mirror([0,0,1]) - translate([botleft[0], botleft[1], 0]) - cube([size[0], size[1], tile_th]); - translate( [ botleft_post[0], botleft_post[1], -tile_th ] - + 0.5 * [ post_dia, -post_dia, 0 ] ) + 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] ); + + [-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); @@ -80,27 +101,26 @@ 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]) @@ -109,70 +129,167 @@ module RoundLeftCorner(this_post, right_post) { } } -module InterlockCore(r, plusth, ymir) { +module InterlockLobePlan(negative) { + r = negative ? interlock_negative_rad : interlock_rad; + ymir = negative ? 0 : 1; + dx = sqrt(3) * r; $fn= 80; - translate([0, -thehd[0], plusth]){ - 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); - } - } + translate([thehd[0], 0]){ + mirror([0,ymir]){ + 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 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]) { + InterlockLobePlan(negative); + } + } + + if (dosquare) { + iadj = 0; + slotshorter = negative ? 0 : interlock_fine_lenslop; + mirror([0, negative]) + translate([slotshorter, iadj]) + square([length - slotshorter*2, interlock_fine + iadj*2]); + } } -module Interlock(this_post, right_post) { - INREFFRAME(this_post, right_post) - InterlockCore(interlock_rad, 0, 1); +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; + + negsign = negative ? -1 : +1; + yprotr = negsign * protr; + + INREFFRAME(left_cnr, right_cnr) { + for (vsect = [ // zs0 zs1 ys0, ys1 + [ -tile_th-plusth, plusth, 0, 0], + [ z1, z2, 0, yprotr], + [ z2, z3, yprotr, 0], + ]) { + zs0 = vsect[0]; + zs1 = vsect[1]; + zsd = zs1-zs0; + ys0 = vsect[2]; + ys1 = vsect[3]; + ysd = ys1-ys0; + sl = ysd/zsd; + m = [ [ 1,0, 0, 0 ], + [ 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, !!ysd); + } + } } +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]); + InterlockEdge(corners[1], corners[2], 1, nlobes=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]); + InterlockEdge(corners[3], corners[0], 0, nlobes=1); } - -module Demo(){ - translate([ -thehd[1], 0 ]) + +module TestDemo(){ ////toplevel + translate([ -thehd[0], 0 ]) color("blue") TestPiece1(); - translate([ +thehd[1], 0 ]) + translate([ +thehd[0] + demo_slop, 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]); + 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); +} + +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]); + InterlockEdge(c[0], c[1], 1); + } + Posts(posts); + RoundEdge(c[2], c[3]); + RoundEdge(c[3], c[0]); + RoundLeftCorner(c[2], c[3]); +} + +module Demo(){ ////toplevel + translate(demo_slop*[-2,1]) color("blue") Tile12(); + translate(demo_slop*[-2,0]) color("red") Tile02(); +} + //TestPiece1(); //TestPiece2(); //Demo();