-rw-r--r-- | another.scad | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/another.scad b/another.scad index 55fda78..b2e6c74 100644 --- a/another.scad +++ b/another.scad | |||
@@ -36,97 +36,97 @@ module the_extruder( | |||
36 | // spring tensioner | 36 | // spring tensioner |
37 | st_nut_d = 9, st_nut_h = 4, | 37 | st_nut_d = 9, st_nut_h = 4, |
38 | st_screw_d = 5, | 38 | st_screw_d = 5, |
39 | st_thickshell = 8*extrusion_width, st_thinshell = 4*extrusion_width, | 39 | st_thickshell = 8*extrusion_width, st_thinshell = 4*extrusion_width, |
40 | 40 | ||
41 | // screw it | 41 | // screw it |
42 | mount_screw_d = 3.1, mount_screw_l = 20, | 42 | mount_screw_d = 3.1, mount_screw_l = 20, |
43 | mount_screwhead_d=6, mount_screwhead_h=3, | 43 | mount_screwhead_d=6, mount_screwhead_h=3, |
44 | idler_screw_d = 3, | 44 | idler_screw_d = 3, |
45 | idler_screwhead_d=6, idler_screwhead_h=3, | 45 | idler_screwhead_d=6, idler_screwhead_h=3, |
46 | 46 | ||
47 | pf = pushfit_embeddest, | 47 | pf = pushfit_embeddest, |
48 | pf_shell = max(3*layer_height,3*extrusion_width), | 48 | pf_shell = max(3*layer_height,3*extrusion_width), |
49 | pf_smooth = true, | 49 | pf_smooth = true, |
50 | 50 | ||
51 | // empty spaces | 51 | // empty spaces |
52 | idler_travel = 3, // how far should idler travel when pressed | 52 | idler_travel = 3, // how far should idler travel when pressed |
53 | idler_clearance=1, | 53 | idler_clearance=1, |
54 | pulley_d_clearance=2, | 54 | pulley_d_clearance=2, |
55 | pulley_small_d_clearance=0.5, | 55 | pulley_small_d_clearance=0.5, |
56 | lever_v_clearance=.7, // vertical clearance for the lever | 56 | lever_v_clearance=.7, // vertical clearance for the lever |
57 | spring_d_clearance=1, | 57 | spring_d_clearance=1, |
58 | protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion | 58 | protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion |
59 | protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion | 59 | protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion |
60 | mount_screw_d_tolerance=.4, | 60 | mount_screw_d_tolerance=.4, |
61 | idler_v_tolerance=.5, | 61 | idler_v_tolerance=.5, |
62 | knob_bore_d_tolerance=.6, | 62 | knob_bore_d_tolerance=.6, |
63 | st_nut_h_tolerance=.2, | 63 | st_nut_h_tolerance=.2, |
64 | st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */ | 64 | st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */ |
65 | st_screw_d_tolerance=.5, | 65 | st_screw_d_tolerance=.5, |
66 | st_split_w_tolerance = .3, | 66 | st_split_w_tolerance = .3, |
67 | 67 | ||
68 | min_z_shell = 4*layer_height, // the very minimal shell thickness along z-axis. | 68 | min_z_shell = 4*layer_height, // the very minimal shell thickness along z-axis. |
69 | min_xy_shell = 2*extrusion_width, | 69 | min_xy_shell = 2*extrusion_width, |
70 | 70 | ||
71 | what="lever", // lever|body|knob|springpad|* | 71 | what="lever", // lever|body|knob|springpad|* |
72 | left=false, | 72 | left=false, |
73 | vitamins = true, | 73 | vitamins = true, |
74 | supports = false, bridges = true, | 74 | supports = false, bridges = true, |
75 | tensioner = true, | 75 | tensioner = true, |
76 | debug = false | 76 | debug = false |
77 | ) { | 77 | ) { |
78 | fnd = 2*PI; fnr = 2*fnd; | 78 | fnd = 2*PI; fnr = 2*fnd; |
79 | 79 | ||
80 | idler_filament_offset = filament_path_d/2; // -filament_offset; | 80 | idler_filament_offset = filament_path_d/2; // -filament_offset; |
81 | lever_shell = mount_screwhead_h+0.5; | 81 | lever_shell = mount_screwhead_h+0.5; |
82 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); | 82 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); |
83 | lsd = idler_d-idler_clearance*2; // the diameter of lever thingie | 83 | lsd = idler_d-idler_clearance*2; // the diameter of lever thingie |
84 | longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+extrusion_width; | 84 | longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell; |
85 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) | 85 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) |
86 | sqrt(c*c+pow(a-c,2)); | 86 | sqrt(c*c+pow(a-c,2)); |
87 | longwing_travel = idler_travel*longwing/shortwing; | 87 | longwing_travel = idler_travel*longwing/shortwing; |
88 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); | 88 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); |
89 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); | 89 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); |
90 | spring_dl = idler_travel*longwing/ri; | 90 | spring_dl = idler_travel*longwing/ri; |
91 | // finger and spring support | 91 | // finger and spring support |
92 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); | 92 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); |
93 | 93 | ||
94 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; | 94 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; |
95 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; | 95 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; |
96 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; | 96 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; |
97 | ls_z = filament_elevation; // leverspace mid-z | 97 | ls_z = filament_elevation; // leverspace mid-z |
98 | ls_h = lever_thickness+lever_v_clearance; // leverspace height | 98 | ls_h = lever_thickness+lever_v_clearance; // leverspace height |
99 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); | 99 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); |
100 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); | 100 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); |
101 | echo("mount depth",mount_depth); | 101 | echo("mount depth",mount_depth); |
102 | 102 | ||
103 | module teardrop(r,d,h,center=false,angle=45) { | 103 | module teardrop(r,d,h,center=false,angle=45) { |
104 | dd = d ? d : (2*r); | 104 | dd = d ? d : (2*r); |
105 | $fn = dd*fnd; | 105 | $fn = dd*fnd; |
106 | cylinder(d=dd,h=h,center=center); | 106 | cylinder(d=dd,h=h,center=center); |
107 | if(angle>0) translate([0,0,center?-h/2:0]) | 107 | if(angle>0) translate([0,0,center?-h/2:0]) |
108 | rotate([0,0,angle]) | 108 | rotate([0,0,angle]) |
109 | cube(size=[d/2,d/2,h]); | 109 | cube(size=[d/2,d/2,h]); |
110 | } | 110 | } |
111 | 111 | ||
112 | module mirrorleft() { | 112 | module mirrorleft() { |
113 | mirror([left?0:1,0,0]) children(); | 113 | mirror([left?0:1,0,0]) children(); |
114 | } | 114 | } |
115 | module place_idler() { | 115 | module place_idler() { |
116 | rotate([0,0,45]) | 116 | rotate([0,0,45]) |
117 | translate([(pulley_d+idler_d)/2,0,0]) | 117 | translate([(pulley_d+idler_d)/2,0,0]) |
118 | children(); | 118 | children(); |
119 | } | 119 | } |
120 | module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { | 120 | module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { |
121 | if(depth) { | 121 | if(depth) { |
122 | hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); | 122 | hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); |
123 | rr = depth+hh; | 123 | rr = depth+hh; |
124 | translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr); | 124 | translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr); |
125 | }else if(r) { | 125 | }else if(r) { |
126 | hh=sqrt(pow(r,2)-pow(d,2)/4); | 126 | hh=sqrt(pow(r,2)-pow(d,2)/4); |
127 | translate([0,0,hh]) sphere(r=r,$fn=fnr*r); | 127 | translate([0,0,hh]) sphere(r=r,$fn=fnr*r); |
128 | } | 128 | } |
129 | } | 129 | } |
130 | 130 | ||
131 | % if(vitamins) mirrorleft() { | 131 | % if(vitamins) mirrorleft() { |
132 | translate([0,0,-epsilon]) mirror([0,0,1]) cylinder(d=gearbox_d,h=1,$fn=60); | 132 | translate([0,0,-epsilon]) mirror([0,0,1]) cylinder(d=gearbox_d,h=1,$fn=60); |
@@ -364,97 +364,97 @@ module the_extruder( | |||
364 | 364 | ||
365 | // spring tensioner | 365 | // spring tensioner |
366 | translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) { | 366 | translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) { |
367 | if(!tensioner) finger_indent(d=lever_thickness-1,r=15); else { | 367 | if(!tensioner) finger_indent(d=lever_thickness-1,r=15); else { |
368 | mirror([0,0,1]) { | 368 | mirror([0,0,1]) { |
369 | translate([0,0,st_thickshell]) | 369 | translate([0,0,st_thickshell]) |
370 | hull() for(o=[0,spring_d]) translate([0,-o,0]) | 370 | hull() for(o=[0,spring_d]) translate([0,-o,0]) |
371 | rotate([0,0,30]) | 371 | rotate([0,0,30]) |
372 | cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6); | 372 | cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6); |
373 | translate([0,0,-1]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=fsw+2,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); | 373 | translate([0,0,-1]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=fsw+2,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); |
374 | bigd = spring_d+spring_d_clearance; | 374 | bigd = spring_d+spring_d_clearance; |
375 | hf = (bigd-st_screw_d-st_screw_d_tolerance)/2; | 375 | hf = (bigd-st_screw_d-st_screw_d_tolerance)/2; |
376 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon]) { | 376 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon]) { |
377 | cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd, | 377 | cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd, |
378 | h=hf+epsilon, $fn=fnd*bigd); | 378 | h=hf+epsilon, $fn=fnd*bigd); |
379 | translate([0,-(st_thinshell+st_split_w_tolerance)/2,0]) | 379 | translate([0,-(st_thinshell+st_split_w_tolerance)/2,0]) |
380 | cube(size=[body_h-ls_z+1,st_thinshell+st_split_w_tolerance,fsw+1]); | 380 | cube(size=[body_h-ls_z+1,st_thinshell+st_split_w_tolerance,fsw+1]); |
381 | } | 381 | } |
382 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon]) | 382 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon]) |
383 | cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd); | 383 | cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd); |
384 | } | 384 | } |
385 | } | 385 | } |
386 | } | 386 | } |
387 | 387 | ||
388 | }//difference | 388 | }//difference |
389 | 389 | ||
390 | if(supports) intersection() { | 390 | if(supports) intersection() { |
391 | difference() { | 391 | difference() { |
392 | translate([0,0,ls_z-ls_h/2-epsilon]) | 392 | translate([0,0,ls_z-ls_h/2-epsilon]) |
393 | cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=fnd*gearbox_d); | 393 | cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=fnd*gearbox_d); |
394 | cylinder(d=pulley_d+pulley_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance)); | 394 | cylinder(d=pulley_d+pulley_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance)); |
395 | } | 395 | } |
396 | // supports | 396 | // supports |
397 | // TODO: hardcoded stuff below… | 397 | // TODO: hardcoded stuff below… |
398 | if(false) { // parallel | 398 | if(false) { // parallel |
399 | for(y=[-gearbox_d:4:gearbox_d]) | 399 | for(y=[-gearbox_d:4:gearbox_d]) |
400 | translate([0,y-extrusion_width/2,0]) | 400 | translate([0,y-extrusion_width/2,0]) |
401 | cube(size=[gearbox_d,extrusion_width,body_h]); | 401 | cube(size=[gearbox_d,extrusion_width,body_h]); |
402 | }else{ // radial | 402 | }else{ // radial |
403 | for(zr=[-65:(65+50)/7:50]) | 403 | for(zr=[-65:(65+50)/7:50]) |
404 | rotate([0,0,zr]) translate([0,-extrusion_width/2,0]) | 404 | rotate([0,0,zr]) translate([0,-extrusion_width/2,0]) |
405 | cube(size=[gearbox_d,extrusion_width,body_h]); | 405 | cube(size=[gearbox_d,extrusion_width,body_h]); |
406 | } | 406 | } |
407 | } | 407 | } |
408 | 408 | ||
409 | }//body module | 409 | }//body module |
410 | 410 | ||
411 | module springpad() { | 411 | module springpad() { |
412 | smalld=st_screw_d+st_screw_d_tolerance+2*extrusion_width; | 412 | smalld=st_screw_d+st_screw_d_tolerance+min_xy_shell; |
413 | bigd = spring_d+spring_d_clearance/2; | 413 | bigd = spring_d+spring_d_clearance/2; |
414 | hf = (bigd-smalld)/2; | 414 | hf = (bigd-smalld)/2; |
415 | h = hf*3.5; | 415 | h = hf*3.5; |
416 | translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation]) | 416 | translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation]) |
417 | rotate([0,90,0]) difference() { | 417 | rotate([0,90,0]) difference() { |
418 | union() { | 418 | union() { |
419 | cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); | 419 | cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); |
420 | translate([0,0,hf-epsilon]) | 420 | translate([0,0,hf-epsilon]) |
421 | cylinder(d=bigd,h=h-hf,$fn=fnd*bigd); | 421 | cylinder(d=bigd,h=h-hf,$fn=fnd*bigd); |
422 | translate([0,0,h]) | 422 | translate([0,0,h]) |
423 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); | 423 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); |
424 | l = body_h-ls_z; | 424 | l = body_h-ls_z; |
425 | w = st_thinshell; | 425 | w = st_thinshell; |
426 | hull() translate([0,-st_thinshell/2,0]) mirror([1,0,0]) { | 426 | hull() translate([0,-st_thinshell/2,0]) mirror([1,0,0]) { |
427 | translate([0,0,w]) | 427 | translate([0,0,w]) |
428 | cube(size=[l,st_thinshell,w]); | 428 | cube(size=[l,st_thinshell,w]); |
429 | cube(size=[l-w,st_thinshell,2*w]); | 429 | cube(size=[l-w,st_thinshell,2*w]); |
430 | } | 430 | } |
431 | } | 431 | } |
432 | translate([0,0,-epsilon]) | 432 | translate([0,0,-epsilon]) |
433 | cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); | 433 | cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); |
434 | } | 434 | } |
435 | } | 435 | } |
436 | 436 | ||
437 | module knob() { | 437 | module knob() { |
438 | ch = knob_indent_d/2; | 438 | ch = knob_indent_d/2; |
439 | translate([0,0,body_h+epsilon]) { | 439 | translate([0,0,body_h+epsilon]) { |
440 | mirror([0,0,1]) translate([0,0,-epsilon]) { | 440 | mirror([0,0,1]) translate([0,0,-epsilon]) { |
441 | difference() { | 441 | difference() { |
442 | cylinder(d=pulley_d,h=knob_bore_l,$fn=fnd*pulley_d); | 442 | cylinder(d=pulley_d,h=knob_bore_l,$fn=fnd*pulley_d); |
443 | translate([0,0,-1]) difference() { | 443 | translate([0,0,-1]) difference() { |
444 | cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2); | 444 | cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2); |
445 | translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1]) | 445 | translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1]) |
446 | cube([bore_d+2,bore_d/2,knob_bore_l+4]); | 446 | cube([bore_d+2,bore_d/2,knob_bore_l+4]); |
447 | } | 447 | } |
448 | } | 448 | } |
449 | } | 449 | } |
450 | difference() { | 450 | difference() { |
451 | union() { | 451 | union() { |
452 | cylinder(d1=gearbox_d-2*ch,d2=gearbox_d,h=ch+epsilon,$fn=fnd*gearbox_d); | 452 | cylinder(d1=gearbox_d-2*ch,d2=gearbox_d,h=ch+epsilon,$fn=fnd*gearbox_d); |
453 | translate([0,0,ch]) | 453 | translate([0,0,ch]) |
454 | cylinder(d=gearbox_d,h=knob_h-2*ch+epsilon,$fn=fnd*gearbox_d); | 454 | cylinder(d=gearbox_d,h=knob_h-2*ch+epsilon,$fn=fnd*gearbox_d); |
455 | translate([0,0,knob_h-ch]) | 455 | translate([0,0,knob_h-ch]) |
456 | cylinder(d1=gearbox_d,d2=gearbox_d-2*ch,h=ch,$fn=fnd*gearbox_d); | 456 | cylinder(d1=gearbox_d,d2=gearbox_d-2*ch,h=ch,$fn=fnd*gearbox_d); |
457 | } | 457 | } |
458 | for(a=[0:360/knob_indents:359]) rotate([0,0,a]) | 458 | for(a=[0:360/knob_indents:359]) rotate([0,0,a]) |
459 | translate([0,gearbox_d/2,-1]) | 459 | translate([0,gearbox_d/2,-1]) |
460 | cylinder(d=knob_indent_d,h=knob_h+2,$fn=fnd*knob_indent_d); | 460 | cylinder(d=knob_indent_d,h=knob_h+2,$fn=fnd*knob_indent_d); |