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=83d04e0278629a794a11ff5746d7d0ec5bd3d573;hb=464ea5bfb20555916aa523b6d2745805347b4245;hpb=b006c1b96da9329277c5b993de12974259cc67cb diff --git a/sewing-table.scad.m4 b/sewing-table.scad.m4 index 83d04e0..b4ec954 100644 --- a/sewing-table.scad.m4 +++ b/sewing-table.scad.m4 @@ -28,8 +28,40 @@ 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 PLY edge = ", ply_edge_hole_dist)); @@ -63,6 +95,13 @@ 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); + } + } } } @@ -81,11 +120,29 @@ 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] ]); + 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); + } + } + } } } @@ -122,6 +179,8 @@ 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; @@ -237,6 +296,7 @@ module TestPiece1(){ ////toplevel [ 0, 0] ]; corners = TestPiece_holes2corners(holes); + rcs = [corners[0], corners[1]]; difference(){ union(){ TileBase(corners[0], corners[2]); @@ -245,9 +305,9 @@ 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 @@ -268,8 +328,71 @@ 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_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] ], @@ -281,21 +404,32 @@ 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; 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); @@ -306,23 +440,107 @@ module Tile12(){ ////toplevel c0 = [-sz[0], 0]; c = Rectangle_corners(c0, sz); posts = Rectangle_corners2posts(c); - rcs = [c[2], c[3]]; + rcs = [R_EDGE(c,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,2)); + RoundEdge(R_EDGE(c,3)); } - InterlockEdge(c[0], c[1], 1); + 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();