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=80d86c84e3dc2d2c09aec5b2201c1b1c0c354642;hp=91d6629f40e0b4b87c727a2b11034f987f0bca97;hb=9ffd4381b8d5ce1b473fd5e6078d654c609d6111;hpb=015cd12073fed8ee2788c96653f0044f4dbd83ff diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4 index 91d6629..80d86c8 100644 --- a/sewing-table.scad.m4 +++ b/sewing-table.scad.m4 @@ -18,15 +18,92 @@ screw_big_len = 4.0; round_edge_rad = 2.0; +round_cnr_rad = 10; + interlock_dia = 10; -interlock_fine = 1.0; +interlock_fine = 0.66; +interlock_fine_slope = 1.0; interlock_fine_lenslop = 1.0; demo_slop = 0.1; +// cutout + +machine_rear_to_front = 85; + +machine_rear_profile = [ + [ - 0, -0.00 ], + [ - 2, -0.10 ], + [ - 4, -0.20 ], + [ - 5, -0.30 ], + [ - 6, -0.40 ], + [ - 7, -0.50 ], + [ - 8, -0.75 ], + [ - 10, -1.50 ], + [ - 12, -2.25 ], + [ - 14, -3.25 ], + [ - 16, -4.25 ], + [ - 18, -5.75 ], + [ - 20, -8.00 ] + ]; + +machine_front_profile = [ + [ 128, -3.70, ], + [ 124, -2.90, ], + [ 120, -2.45, ], + [ 116, -2.10, ], + [ 112, -1.80, ], + [ 108, -1.55, ], + [ 104, -1.25, ], + [ 100, -1.00, ], + [ 96, -0.80, ], + [ 92, -0.65, ], + [ 88, -0.55, ], + [ 84, -0.50, ] + ]; + +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 = machine_rear_to_front; +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; + +tile02_tr = [-250, 0]; +tile01_tr = [ 0, 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; + +// front and rear curves + +rearedge_len = 170; + +rearcurve_strt_len = 52; + +rearcurve_z_slop = 0.75; + +rearcurve_avoid_y = 35; + +rearcurve_double_inrad = 26.10 + 8.04; + +reartablet_z = 2.54; +reartablet_x = 5 + 1; +reartablet_y = 5; + +frontcurve_side_skew = 3.5 / 72; +frontcurve_avoid_y = 70; +frontcurve_z_slop = 0.75; + // 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)); @@ -49,6 +126,13 @@ thehd_br = -thehd_tl; interlock_rad = interlock_dia/2; interlock_negative_rad = interlock_rad + 0.125; +interlock_sq_adj = 0.2; // arbitrary + +first_front = machine_front_profile[len(machine_front_profile)-1]; + +m4_define(`POST_TCROSSSZ', + `2*( tile_hard_edge_hole_dist - test_edge + 1 )') + module Post(){ mirror([0,0,1]) { difference(){ @@ -58,6 +142,12 @@ module Post(){ cylinder(r= screw_dia/2, h= ply_th, $fn=20); } } + if (TEST) { + translate([0,0, tile_th/2]) { + cube([post_dia, POST_TCROSSSZ, tile_th], center=true); + cube([POST_TCROSSSZ, post_dia, tile_th], center=true); + } + } } } @@ -76,11 +166,32 @@ 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) { + crossoff = tile_hard_edge_hole_dist + POST_TCROSSSZ/2; + cidsz = [ size[0] - 2*crossoff, thehd[1] ]; + translate( concat(botleft + [crossoff, 0] + cidsz, [0]) ) + rotate([0,0,180]) + Commitid_BestCount(cidsz); + 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); + } + } + } } } @@ -116,12 +227,36 @@ module RoundEdge(left_cnr, right_cnr) { } } -module RoundLeftCorner(this_cnr, right_cnr) { +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]); + } } } } @@ -147,9 +282,7 @@ module InterlockLobePlan(negative) { } } -module InterlockEdgePlan(negative, nlobes, length) { - iadj = 0.1; - +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]) { @@ -157,22 +290,46 @@ module InterlockEdgePlan(negative, nlobes, length) { } } - slotshorter = negative ? 0 : interlock_fine_lenslop; - mirror([0, negative]) - translate([slotshorter, iadj]) - square([length - slotshorter*2, interlock_fine + iadj*2]); + 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) { - translate([0, 0, plusth]){ - mirror([0,0,1]){ - linear_extrude(height=tile_th+plusth*2, convexity=10){ - InterlockEdgePlan(negative, nlobes, length); - } - } + 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); } } } @@ -188,14 +345,18 @@ module TestPiece1(){ ////toplevel [ 0, 0] ]; corners = TestPiece_holes2corners(holes); + rcs = [corners[0], corners[1]]; difference(){ - TileBase(corners[0], corners[2]); + 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 @@ -216,8 +377,133 @@ module TestDemo(){ ////toplevel 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_Profile(){ + first_rear = machine_rear_profile[0]; + below_point = 0.5 * ( first_rear + first_front ) + [ 0, -10 ]; + pol = concat( machine_rear_profile, + [ below_point ], + machine_front_profile); + skew_angle = atan2( first_front[1] - first_rear[1], + first_front[0] - first_rear[0] ); + echo(below_point, pol, skew_angle); + hull(){ + for (z=[0,-40]) { + translate([0,z]) { + //scale([1,5]) + rotate([0,0, -skew_angle ]){ + //translate( - first_front ) + polygon(pol); + } + } + } + } +} + +module Machine_RearProfile(){ + intersection(){ + Machine_Profile(); + translate([ -200 + machine_rear_to_front/2, -100 ]) { + square([200,200]); + } + } +} + +module Machine_FrontProfile(){ + intersection(){ + Machine_Profile(); + translate([ machine_rear_to_front/2, -100 ]) { + square([200,200]); + } + } +} + +module Machine_Curves(){ ////toplevel + translate([ tile01_tr[0] - cutout_l_end_x + rearedge_len, + cutout_tile11_y, + 0 ]){ + //%cube([20,20,20]); + translate([ -reartablet_x, + -1, + -reartablet_z]) + mirror([0,0,1]) + cube([ reartablet_x+1, + reartablet_y+1, + 20 ]); + } + translate([ tile01_tr[0] - cutout_l_end_x + rearedge_len, + cutout_tile11_y, + frontcurve_z_slop ]){ + translate([ 0, -first_front[0] , 0 ]) + multmatrix([[1, -frontcurve_side_skew, 0, 0], + [0, 1, 0, 0], + [0, 0, 1, 0], + [0, 0, 0, 1]]) + translate([ 0, first_front[0] , 0 ]) + mirror([1,0,0]){ + rotate([0,-90,0])rotate([0,0,-90]){ + linear_extrude(height= 200) + Machine_FrontProfile(); + } + } + translate([ rearcurve_strt_len, + 0, + rearcurve_z_slop ]){ + translate([ 1, + 0, + 0 + ]){ + rotate([0,-90,0])rotate([0,0,-90]){ + linear_extrude(height= rearcurve_strt_len + 1) + Machine_RearProfile(); + } + } + translate([ 0, + 0, + rearcurve_double_inrad ]) { + intersection(){ + rotate([90,0,0]){ + rotate_extrude(convexity=10, $fn=32) { + rotate([0,0,90]) translate([ 0, + -rearcurve_double_inrad ]) { + Machine_RearProfile(); + } + } + } + mirror([0,0,1]) + translate([0,-75,0]) cube([150,150,150]); + } + } + } + } +} + +module Machine(){ ////toplevel + Machine_Arm(); + Machine_Curves(); +} 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] ], @@ -229,42 +515,178 @@ function Rectangle_corners2posts(c) = 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; + c0 = tile02_tr + -sz; c = Rectangle_corners(c0, sz); posts = Rectangle_corners2posts(c); + rcs = [R_EDGE(c,0)]; difference(){ - TileBase(c[0], c[2]); - InterlockEdge(c[1], c[2], 1); + 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); } - Posts(posts); - RoundEdge(c[0], c[1]); - RoundEdge(c[3], c[0]); - RoundLeftCorner(c[0], c[1]); - InterlockEdge(c[2], c[3], 0); + RoundCornerAdd(rcs); } module Tile12(){ ////toplevel sz = [100,250]; - c0 = [-sz[0], 0]; + c0 = tile02_tr + [-sz[0], 0]; c = Rectangle_corners(c0, sz); posts = Rectangle_corners2posts(c); + rcs = [R_EDGE(c,3)]; difference(){ - TileBase(c[0], c[2]); - InterlockEdge(c[0], c[1], 1); + 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); } - Posts(posts); - RoundEdge(c[2], c[3]); - RoundEdge(c[3], c[0]); - RoundLeftCorner(c[2], c[3]); + RoundCornerAdd(rcs); +} + +tile_01_11_cnr = tile01_tr + [-cutout_tile11_x, 0]; +tile_11_10_cnr = tile01_tr + [0, cutout_tile11_y]; +tile_01_00_cnr = tile01_tr - [0, cutout_tile01_y]; + +module Tile11(){ ////toplevel + sz = [250,250]; + c0 = tile01_tr + [-sz[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(); + } +} + +module Tile01(){ ////toplevel + sz = [250,170]; + c0 = tile01_tr + -sz; + 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 = tile01_tr + [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] + [ -sz[0] + rearedge_len - cutout_l_end_x, cty ], + cnr_posts[1] + [ 0, rcy ], + cnr_posts[2], + cnr_posts[3] ]; + rcs = [R_EDGE(c,2)]; + difference(){ + union(){ + Rectangle_TileBase(c); + Posts(posts); + RoundEdge(R_EDGE(c,1)); + RoundEdge(R_EDGE(c,2)); + InterlockEdge(c[3], tile_11_10_cnr); + } + RoundCornerCut(rcs); + Machine(); + } + RoundCornerAdd(rcs); +} + +module Tile00(){ ////toplevel + sz = [250,170]; + c0 = tile01_tr + [0,-sz[1]]; + c = Rectangle_corners(c0, sz); + cnr_posts = Rectangle_corners2posts(c); + cty = cutout_tile01_y; + rcy = cty + frontcurve_avoid_y; + posts = [ cnr_posts[0], + cnr_posts[1], + cnr_posts[2] + [ 0, -rcy ], + cnr_posts[2] + [ -sz[0] + rearedge_len - cutout_l_end_x, -cty ], + cnr_posts[3] + [ 0, -cty ] + ]; + rcs = [R_EDGE(c,1)]; + difference(){ + union(){ + Rectangle_TileBase(c); + Posts(posts); + RoundEdge(R_EDGE(c,0)); + RoundEdge(R_EDGE(c,1)); + InterlockEdge(tile_01_00_cnr, c[0]); + } + RoundCornerCut(rcs); + Machine(); + } + RoundCornerAdd(rcs); } 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(); + translate(demo_slop*[-3,0]) color("red") Tile00(); + %Machine(); } //TestPiece1(); //TestPiece2(); //Demo(); + +//Machine_Profile(); +//Machine_RearProfile();