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=2995d9fc7f17d4f6aacfc7d62bc21693394e84bc;hp=3311bc377df2679a7a1ed9197e92eb31f5342752;hb=913a28f5a8559ae38efb14faec2b630f91d713a9;hpb=8488c936f3033d8081bab504e245f674277be4d5 diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4 index 3311bc3..2995d9f 100644 --- a/sewing-table.scad.m4 +++ b/sewing-table.scad.m4 @@ -18,10 +18,20 @@ screw_big_len = 4.0; round_edge_rad = 2.0; +round_cnr_rad = 10; + interlock_dia = 10; +interlock_fine = 0.66; + +interlock_fine_slope = 1.0; +interlock_fine_lenslop = 1.0; + +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)); @@ -44,6 +54,8 @@ 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(){ @@ -53,6 +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); + } + } } } @@ -71,11 +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])); + } + } } } @@ -111,21 +142,46 @@ module RoundEdge(left_cnr, right_cnr) { } } -module RoundLeftCorner(this_cnr, right_cnr) { +module RoundCornerCut(ci) { + 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]); + } } } } -module InterlockLobePlan(r, ymir) { +module InterlockLobePlan(negative) { + r = negative ? interlock_negative_rad : interlock_rad; + ymir = negative ? 0 : 1; + dx = sqrt(3) * r; $fn= 80; translate([thehd[0], 0]){ - mirror([0,ymir,0]){ + mirror([0,ymir]){ circle(r=r); difference(){ translate([-dx, -0.1]) @@ -139,30 +195,54 @@ module InterlockLobePlan(r, ymir) { } } -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+plusth*2, convexity=10){ - InterlockLobePlan(r, ymir); - } +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); } } -} -module InterlockLobe(this_cnr, right_cnr, negative=0) { - INREFFRAME(this_cnr, right_cnr) - InterlockLobeCore(negative); + 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) { + 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 (lobei = [ 0 : nlobes-1 ]) { - lobex = (length - thehd[0]*2) * (lobei ? lobei / (nlobes-1) : 0); - translate([lobex, 0, 0]) - InterlockLobeCore(negative); + 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); } } } @@ -178,14 +258,18 @@ module TestPiece1(){ ////toplevel [ 0, 0] ]; corners = TestPiece_holes2corners(holes); + rcs = [corners[0], corners[1]]; difference(){ - TileBase(corners[0], corners[2]); - InterlockLobe(corners[1], corners[2], 1); + 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 @@ -196,14 +280,14 @@ module TestPiece2(){ ////toplevel TileBase(corners[0], corners[2]); Posts(holes); RoundEdge(corners[0], corners[1]); - InterlockLobe(corners[3], corners[0]); + InterlockEdge(corners[3], corners[0], 0, nlobes=1); } module TestDemo(){ ////toplevel translate([ -thehd[0], 0 ]) color("blue") TestPiece1(); - translate([ +thehd[0], 0 ]) + translate([ +thehd[0] + demo_slop, 0 ]) TestPiece2(); } @@ -224,14 +308,19 @@ 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, 2); + RoundCornerAdd(rcs); } module Tile12(){ ////toplevel @@ -239,18 +328,23 @@ 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 - color("blue") Tile12(); - color("red") Tile02(); + translate(demo_slop*[-2,1]) color("blue") Tile12(); + translate(demo_slop*[-2,0]) color("red") Tile02(); } //TestPiece1();