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=b4ec95486dd3a837aef686944e5b303e76b96ad6;hp=e8f6b7a7c68a4e79ee2c6310a0a7200708d48609;hb=464ea5bfb20555916aa523b6d2745805347b4245;hpb=e21fc4e825b97f960748962465d8fef8f51fa6df diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4 index e8f6b7a..b4ec954 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; @@ -17,20 +18,73 @@ 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; + +// cutout + +cutout_l_end_y_front_slop = 0.5; +cutout_l_end_y_rear_slop = 0.5; +cutout_l_end_x_slop = 0.25; + +cutout_l_end_x = 22; +cutout_l_end_y = 85; +cutout_l_end_curve = 1; +cutout_l_end_y_total = cutout_l_end_y + + cutout_l_end_y_front_slop + cutout_l_end_y_rear_slop; + +tile01_tr = [250, 0]; + +cutout_tile01_y = 170 - 147 + cutout_l_end_y_front_slop; +cutout_tile11_x = cutout_l_end_x + cutout_l_end_curve; +cutout_tile11_y = cutout_l_end_y_total - cutout_tile01_y; + +// rear curve + +rearedge_len = 170; + +rearcurve_rad = 25.4; +rearcurve_strt_len = 65; +rearcurve_total_len = 84; + +rearcurve_rad_slop = 0.5; + +rearcurve_avoid_y = rearcurve_rad + 10; // calculated +TEST = false; + 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; + +interlock_sq_adj = 0.2; // arbitrary module Post(){ mirror([0,0,1]) { @@ -41,25 +95,58 @@ 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); + } + } } } 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])); + 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] ]); + difference(){ + 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])); + } + minkowski(){ + Machine(); + cube(max(test_edge, tile_hard_edge_hole_dist)*2, center=true); + } + } + } + } } -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); @@ -73,63 +160,389 @@ 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 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]); + } } } } -module InterlockCore(r) { - translate([0, -thehd[0], 1]){ - mirror([0,0,1]){ - linear_extrude(height=tile_th+2){ - circle(r=r, $fn=40); +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]){ + 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); +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 ? -0.1 : interlock_fine_lenslop; + mirror([0, negative]) + translate([slotshorter, iadj]) + square([length - slotshorter*2, interlock_fine + iadj*2]); + } } -module TestPiece1(){ +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); + rcs = [corners[0], corners[1]]; difference(){ - TileBase(holes[0], holes[1]); - InterlockNegative(holes[1], holes[1] + [0,1]); - + 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); } + RoundCornerAdd(rcs); +} + +module TestPiece2(){ ////toplevel + holes = [ [ 0, 0], + [ 50, 0] + ]; + corners = TestPiece_holes2corners(holes); + TileBase(corners[0], corners[2]); 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]); + InterlockEdge(corners[3], corners[0], 0, nlobes=1); } -TestPiece1(); +module TestDemo(){ ////toplevel + translate([ -thehd[0], 0 ]) + color("blue") + TestPiece1(); + translate([ +thehd[0] + demo_slop, 0 ]) + TestPiece2(); +} + +module Machine_Arm(){ + ysz = cutout_l_end_y_total; + // assume the round end is arc of a circle + chordlen = dist2d([0,0], [ cutout_l_end_y, cutout_l_end_curve ]); + endrad = cutout_l_end_y / cutout_l_end_curve * chordlen; + + translate([0,0,-30]) linear_extrude(height=60) { + translate(tile01_tr + [0, (-cutout_tile01_y + cutout_tile11_y)/2]) { + intersection(){ + translate([-100, -ysz/2]) + square([400, ysz]); + translate([ endrad - cutout_tile11_x - cutout_l_end_x_slop, 0 ]) + circle(r=endrad, $fa=0.01,$fd=5); + } + } + } +} + +module Machine_Rear(){ + big_rad = rearcurve_total_len - rearcurve_strt_len + rearcurve_rad; + small_rad = rearcurve_rad + rearcurve_rad_slop; + translate([ 250 + rearedge_len - cutout_l_end_y + big_rad, + cutout_tile11_y, + 0 ]){ + translate([ 0, + 0, + -rearcurve_rad + ]){ + rotate([0,-90,0]){ + rotate([0,0, 360/8/2]) + cylinder(r = small_rad, h= rearcurve_strt_len); + } + } + translate([ 0, + 0, + big_rad - rearcurve_rad ]) { + intersection(){ + rotate([90,0,0]){ + rotate_extrude(convexity=10) { + translate([ big_rad, + 0 ]) { + hull(){ + circle(r= small_rad); + translate([200,0]) + circle(r= small_rad); + } + } + } + } + mirror([0,0,1]) + cube([150,150,150]); + } + } + } +} + +module Machine(){ ////toplevel + Machine_Arm(); + Machine_Rear(); +} + +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] ], + 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 Rectangle_TileBase(c) { TileBase(c[0], c[2]); } + +function Posts_interpolate_one(c0,c1) = [c0, (c0+c1)/2, c1]; + +m4_dnl R_EDGE(c,ix) +m4_dnl c is from Rectangle_corners and +m4_dnl ix is a corner number +m4_dnl expands to two comma-separated corners: +m4_dnl that denoted by ix, and the next one anticlockwise +m4_define(`R_EDGE',`$1[$2],$1[(($2)+1)%4]') + +module Tile02(){ ////toplevel + sz = [100,170]; + c0 = -sz; + c = Rectangle_corners(c0, sz); + posts = Rectangle_corners2posts(c); + rcs = [R_EDGE(c,0)]; + difference(){ + union(){ + Rectangle_TileBase(c); + Posts(posts); + RoundEdge(R_EDGE(c,0)); + RoundEdge(R_EDGE(c,3)); + InterlockEdge(R_EDGE(c,2), 0); + } + InterlockEdge(R_EDGE(c,1), 1); + RoundCornerCut(rcs); + } + RoundCornerAdd(rcs); +} + +module Tile12(){ ////toplevel + sz = [100,250]; + c0 = [-sz[0], 0]; + c = Rectangle_corners(c0, sz); + posts = Rectangle_corners2posts(c); + rcs = [R_EDGE(c,3)]; + difference(){ + union(){ + Rectangle_TileBase(c); + Posts(posts); + RoundEdge(R_EDGE(c,2)); + RoundEdge(R_EDGE(c,3)); + } + InterlockEdge(R_EDGE(c,0), 1); + InterlockEdge(R_EDGE(c,1), 1); + RoundCornerCut(rcs); + } + RoundCornerAdd(rcs); +} + +tile_01_11_cnr = [250, 0] + [-cutout_tile11_x, 0]; +tile_11_10_cnr = [250, 0] + [0, cutout_tile11_y]; + +module Tile11(){ ////toplevel + sz = [250,250]; + c0 = [0,0]; + c = Rectangle_corners(c0, sz); + cnr_posts = Rectangle_corners2posts(c); + posts = concat( + Posts_interpolate_one(cnr_posts[0], + cnr_posts[1] - [cutout_tile11_x, 0]), + [ cnr_posts[1] + [0, cutout_tile11_y], + cnr_posts[2], + cnr_posts[3] + ]); + difference(){ + union(){ + Rectangle_TileBase(c); + Posts(posts); + RoundEdge(R_EDGE(c,2)); + InterlockEdge(R_EDGE(c,3)); + } + InterlockEdge(c[0], tile_01_11_cnr, 1); + InterlockEdge(tile_11_10_cnr, c[2], 1); + Machine(); + } +} + +tile_01_00_cnr = [250, 0] + [0, -cutout_tile01_y]; + +module Tile01(){ ////toplevel + sz = [250,170]; + c0 = [0,-sz[1]]; + c = Rectangle_corners(c0, sz); + cnr_posts = Rectangle_corners2posts(c); + posts = concat( + Posts_interpolate_one(R_EDGE(cnr_posts,0)), + [ cnr_posts[2] + [0, -cutout_tile01_y] ], + Posts_interpolate_one(cnr_posts[2] - [cutout_tile11_x, 0], + cnr_posts[3]) + ); + difference(){ + union(){ + Rectangle_TileBase(c); + Posts(posts); + RoundEdge(R_EDGE(c,0)); + InterlockEdge(tile_01_11_cnr, c[3]); + InterlockEdge(R_EDGE(c,3)); + } + InterlockEdge(c[1], tile_01_00_cnr, 1); + Machine(); + } +} + +module Tile10(){ ////toplevel + sz = [250,250]; + c0 = [sz[0],0]; + c = Rectangle_corners(c0, sz); + cnr_posts = Rectangle_corners2posts(c); + cty = cutout_tile11_y; + rcy = cty + rearcurve_avoid_y; + posts = [ cnr_posts[0] + [ 0, cty ], + cnr_posts[1] + [ -rearedge_len + cutout_l_end_x, rcy ], + cnr_posts[1] + [ 0, rcy ], + cnr_posts[2], + cnr_posts[3] ]; + difference(){ + union(){ + Rectangle_TileBase(c); + Posts(posts); + RoundEdge(R_EDGE(c,2)); + //InterlockEdge(tile_01_11_cnr, c[3]); + //InterlockEdge(R_EDGE(c,3)); + } + //InterlockEdge(c[1], tile_01_00_cnr, 1); + Machine(); + } +} + +module Demo(){ ////toplevel + translate(demo_slop*[-2,1]) color("blue") Tile12(); + translate(demo_slop*[-2,0]) color("red") Tile02(); + translate(demo_slop*[-2,1]) color("orange") Tile11(); + translate(demo_slop*[-2,0]) color("purple") Tile01(); + translate(demo_slop*[-3,1]) color("blue") Tile10(); + %Machine(); +} + +//TestPiece1(); +//TestPiece2(); +//Demo();