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=41dfdc7368ebed289dc67afe5beacf8e6e366768;hb=9ffd4381b8d5ce1b473fd5e6078d654c609d6111;hpb=84df5cdc00348209a493d24be73f64a825622eeb diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4 index 41dfdc7..80d86c8 100644 --- a/sewing-table.scad.m4 +++ b/sewing-table.scad.m4 @@ -28,6 +28,78 @@ 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; @@ -56,6 +128,11 @@ 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(){ @@ -66,11 +143,9 @@ module Post(){ } } if (TEST) { - tsz = tile_hard_edge_hole_dist - test_edge + 1; - tth = tile_th - test_tile_th + 0.1; - translate([0,0, tth/2 + test_tile_th - 0.1]) { - cube([post_dia, tsz*2, tth], center=true); - cube([tsz*2, post_dia, tth], center=true); + translate([0,0, tile_th/2]) { + cube([post_dia, POST_TCROSSSZ, tile_th], center=true); + cube([POST_TCROSSSZ, post_dia, tile_th], center=true); } } } @@ -99,11 +174,23 @@ module TileBase(botleft, topright){ + [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])); + 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); + } + } } } } @@ -141,6 +228,8 @@ module RoundEdge(left_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; @@ -256,6 +345,7 @@ module TestPiece1(){ ////toplevel [ 0, 0] ]; corners = TestPiece_holes2corners(holes); + rcs = [corners[0], corners[1]]; difference(){ union(){ TileBase(corners[0], corners[2]); @@ -264,9 +354,9 @@ module TestPiece1(){ ////toplevel RoundEdge(corners[3], corners[0]); } InterlockEdge(corners[1], corners[2], 1, nlobes=1); - RoundCornerCut(corners[0], corners[1]); + RoundCornerCut(rcs); } - RoundCornerAdd(corners[0], corners[1]); + RoundCornerAdd(rcs); } module TestPiece2(){ ////toplevel @@ -287,8 +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] ], @@ -300,21 +515,32 @@ 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 = [c[0], c[1]]; + rcs = [R_EDGE(c,0)]; difference(){ union(){ - TileBase(c[0], c[2]); + Rectangle_TileBase(c); Posts(posts); - RoundEdge(c[0], c[1]); - RoundEdge(c[3], c[0]); - InterlockEdge(c[2], c[3], 0); + RoundEdge(R_EDGE(c,0)); + RoundEdge(R_EDGE(c,3)); + InterlockEdge(R_EDGE(c,2), 0); } - InterlockEdge(c[1], c[2], 1); + InterlockEdge(R_EDGE(c,1), 1); RoundCornerCut(rcs); } RoundCornerAdd(rcs); @@ -322,19 +548,128 @@ module Tile02(){ ////toplevel 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 = [c[2], c[3]]; + 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 = 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(){ - TileBase(c[0], c[2]); - RoundEdge(c[2], c[3]); - RoundEdge(c[3], c[0]); + 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); } - InterlockEdge(c[0], c[1], 1); 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); } @@ -342,8 +677,16 @@ module Tile12(){ ////toplevel 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();