-rw-r--r-- | another.scad | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/another.scad b/another.scad index 05bfab3..49833ec 100644 --- a/another.scad +++ b/another.scad | |||
@@ -22,96 +22,97 @@ module the_extruder( | |||
22 | // idler properties | 22 | // idler properties |
23 | idler_d = 10, idler_h = 4, idler_id = 3,// idler dimensions: outer and inner diameters and height | 23 | idler_d = 10, idler_h = 4, idler_id = 3,// idler dimensions: outer and inner diameters and height |
24 | // spring properties | 24 | // spring properties |
25 | spring_d = 10, spring_lc = 9.6, // spring diameter and compressed length | 25 | spring_d = 10, spring_lc = 9.6, // spring diameter and compressed length |
26 | // filament path properties | 26 | // filament path properties |
27 | filament_d = 1.75, | 27 | filament_d = 1.75, |
28 | filament_path_d = 2, | 28 | filament_path_d = 2, |
29 | filament_guide_d = 4, // PTFE filament guide diameter | 29 | filament_guide_d = 4, // PTFE filament guide diameter |
30 | // knob properties | 30 | // knob properties |
31 | knob_h = 10, | 31 | knob_h = 10, |
32 | knob_indent_d = 4, | 32 | knob_indent_d = 4, |
33 | knob_indents = 12, | 33 | knob_indents = 12, |
34 | knob_v_clearance = 1, | 34 | knob_v_clearance = 1, |
35 | // spring tensioner | 35 | // spring tensioner |
36 | st_nut_d = 9, st_nut_h = 4, | 36 | st_nut_d = 9, st_nut_h = 4, |
37 | st_screw_d = 5, | 37 | st_screw_d = 5, |
38 | st_thickshell = 8*extrusion_width, st_thinshell = 2*extrusion_width, | 38 | st_thickshell = 8*extrusion_width, st_thinshell = 2*extrusion_width, |
39 | st_split_w = 4*extrusion_width, | 39 | st_split_w = 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_metal, | 47 | pf = pushfit_metal, |
48 | pf_shell = max(3*layer_height,3*extrusion_width), | 48 | pf_shell = max(3*layer_height,3*extrusion_width), |
49 | 49 | ||
50 | // empty spaces | 50 | // empty spaces |
51 | idler_travel = 3, // how far should idler travel when pressed | 51 | idler_travel = 3, // how far should idler travel when pressed |
52 | idler_clearance=.5, | 52 | idler_clearance=.5, |
53 | pulley_small_d_clearance=.5, | 53 | pulley_small_d_clearance=.5, |
54 | lever_v_clearance=.7, // vertical clearance for the lever | 54 | lever_v_clearance=.7, // vertical clearance for the lever |
55 | spring_d_clearance=1, | 55 | spring_d_clearance=1, |
56 | protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion | 56 | protrusion_tolerance_h=.5, // horizontal tolerance for the motor protrusion |
57 | protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion | 57 | protrusion_tolerance_v=.5, // vertical tolerance for the motor protrusion |
58 | mount_screw_d_tolerance=.4, | 58 | mount_screw_d_tolerance=.4, |
59 | idler_v_tolerance=.5, | 59 | idler_v_tolerance=.5, |
60 | knob_bore_d_tolerance=.8, | 60 | knob_bore_d_tolerance=.8, |
61 | st_nut_h_tolerance=.2, | 61 | st_nut_h_tolerance=.2, |
62 | st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */ | 62 | st_nut_d_tolerance=.2,/* TODO: make it st_nut_w_tolerance */ |
63 | st_screw_d_tolerance=.5, | 63 | st_screw_d_tolerance=.5, |
64 | st_split_w_tolerance = .3, | 64 | st_split_w_tolerance = .3, |
65 | 65 | ||
66 | min_z_shell = 4*layer_height, // the very minimal shell thickness along z-axis. | 66 | min_z_shell = 4*layer_height, // the very minimal shell thickness along z-axis. |
67 | min_xy_shell = 2*extrusion_width, | 67 | min_xy_shell = 2*extrusion_width, |
68 | 68 | ||
69 | body_label = "another", body_label_thickness = layer_height, | 69 | body_label = "another", body_label_thickness = layer_height, |
70 | knob_label = "another", knob_label_thickness = 2*layer_height, knob_label_size=undef, | ||
70 | 71 | ||
71 | what="lever", // lever|body|knob|springpad|* | 72 | what="lever", // lever|body|knob|springpad|* |
72 | left=false, | 73 | left=false, |
73 | vitamins = true, | 74 | vitamins = true, |
74 | bridges = true, | 75 | bridges = true, |
75 | debug = false, | 76 | debug = false, |
76 | ) { | 77 | ) { |
77 | fnd = 2*PI; fnr = 2*fnd; | 78 | fnd = 2*PI; fnr = 2*fnd; |
78 | function lu(m,k) = m[search([k],m)[0]][1]; | 79 | function lu(m,k) = m[search([k],m)[0]][1]; |
79 | 80 | ||
80 | pulley_d = lu(pulley,"d"); | 81 | pulley_d = lu(pulley,"d"); |
81 | pulley_h = lu(pulley,"h"); | 82 | pulley_h = lu(pulley,"h"); |
82 | teeth_elevation = lu(pulley,"fe"); | 83 | teeth_elevation = lu(pulley,"fe"); |
83 | filament_offset = lu(pulley,"g")+filament_d/2; | 84 | filament_offset = lu(pulley,"g")+filament_d/2; |
84 | pulley_d_clearance = lu(pulley,"ssrc")*2; | 85 | pulley_d_clearance = lu(pulley,"ssrc")*2; |
85 | 86 | ||
86 | idler_filament_offset = filament_path_d/2; | 87 | idler_filament_offset = filament_path_d/2; |
87 | lever_shell = mount_screwhead_h+0.5; | 88 | lever_shell = mount_screwhead_h+0.5; |
88 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); | 89 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); |
89 | lsd = idler_d-idler_clearance*2; // the diameter of lever thingie | 90 | lsd = idler_d-idler_clearance*2; // the diameter of lever thingie |
90 | longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell; | 91 | longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell; |
91 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) | 92 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) |
92 | sqrt(c*c+pow(a-c,2)); | 93 | sqrt(c*c+pow(a-c,2)); |
93 | longwing_travel = idler_travel*longwing/shortwing; | 94 | longwing_travel = idler_travel*longwing/shortwing; |
94 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); | 95 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); |
95 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); | 96 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); |
96 | spring_dl = idler_travel*longwing/ri; | 97 | spring_dl = idler_travel*longwing/ri; |
97 | // finger and spring support | 98 | // finger and spring support |
98 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); | 99 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); |
99 | 100 | ||
100 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; | 101 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; |
101 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; | 102 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; |
102 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; | 103 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; |
103 | ls_z = filament_elevation; // leverspace mid-z | 104 | ls_z = filament_elevation; // leverspace mid-z |
104 | ls_h = lever_thickness+lever_v_clearance; // leverspace height | 105 | ls_h = lever_thickness+lever_v_clearance; // leverspace height |
105 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); | 106 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); |
106 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); | 107 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); |
107 | echo("mount depth",mount_depth); | 108 | echo("mount depth",mount_depth); |
108 | 109 | ||
109 | module teardrop(r,d,h,center=false,angle=45) { | 110 | module teardrop(r,d,h,center=false,angle=45) { |
110 | dd = d ? d : (2*r); | 111 | dd = d ? d : (2*r); |
111 | $fn = dd*fnd; | 112 | $fn = dd*fnd; |
112 | cylinder(d=dd,h=h,center=center); | 113 | cylinder(d=dd,h=h,center=center); |
113 | if(angle>0) translate([0,0,center?-h/2:0]) | 114 | if(angle>0) translate([0,0,center?-h/2:0]) |
114 | rotate([0,0,angle]) | 115 | rotate([0,0,angle]) |
115 | cube(size=[d/2,d/2,h]); | 116 | cube(size=[d/2,d/2,h]); |
116 | } | 117 | } |
117 | 118 | ||
@@ -384,99 +385,112 @@ module the_extruder( | |||
384 | smalld=st_screw_d+st_screw_d_tolerance+min_xy_shell; | 385 | smalld=st_screw_d+st_screw_d_tolerance+min_xy_shell; |
385 | bigd = spring_d+spring_d_clearance/2; | 386 | bigd = spring_d+spring_d_clearance/2; |
386 | hf = (bigd-smalld)/2; | 387 | hf = (bigd-smalld)/2; |
387 | h = hf*3.5; | 388 | h = hf*3.5; |
388 | translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation]) | 389 | translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation]) |
389 | rotate([0,90,0]) difference() { | 390 | rotate([0,90,0]) difference() { |
390 | union() { | 391 | union() { |
391 | cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); | 392 | cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); |
392 | translate([0,0,hf-epsilon]) | 393 | translate([0,0,hf-epsilon]) |
393 | cylinder(d=bigd,h=h-hf,$fn=fnd*bigd); | 394 | cylinder(d=bigd,h=h-hf,$fn=fnd*bigd); |
394 | translate([0,0,h]) | 395 | translate([0,0,h]) |
395 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); | 396 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); |
396 | l = body_h-ls_z; | 397 | l = body_h-ls_z; |
397 | w = st_split_w; | 398 | w = st_split_w; |
398 | hull() translate([0,-st_split_w/2,0]) mirror([1,0,0]) { | 399 | hull() translate([0,-st_split_w/2,0]) mirror([1,0,0]) { |
399 | translate([0,0,w]) | 400 | translate([0,0,w]) |
400 | cube(size=[l,st_split_w,w]); | 401 | cube(size=[l,st_split_w,w]); |
401 | cube(size=[l-w,st_split_w,2*w]); | 402 | cube(size=[l-w,st_split_w,2*w]); |
402 | } | 403 | } |
403 | } | 404 | } |
404 | translate([0,0,-epsilon]) | 405 | translate([0,0,-epsilon]) |
405 | cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); | 406 | cylinder(d=st_screw_d+st_screw_d_tolerance,h=2*hf+epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); |
406 | } | 407 | } |
407 | } | 408 | } |
408 | 409 | ||
409 | module knob() { | 410 | module knob() { |
410 | ch = knob_indent_d/2; | 411 | ch = knob_indent_d/2; |
411 | knob_bore_l = body_h-protrusion_h-pulley_elevation-pulley_h-knob_v_clearance; | 412 | knob_bore_l = body_h-protrusion_h-pulley_elevation-pulley_h-knob_v_clearance; |
412 | translate([0,0,body_h+epsilon]) { | 413 | translate([0,0,body_h+epsilon]) { |
413 | mirror([0,0,1]) translate([0,0,-epsilon]) { | 414 | mirror([0,0,1]) translate([0,0,-epsilon]) { |
414 | difference() { | 415 | difference() { |
415 | cylinder(d=pulley_d,h=knob_bore_l,$fn=fnd*pulley_d); | 416 | cylinder(d=pulley_d,h=knob_bore_l,$fn=fnd*pulley_d); |
416 | translate([0,0,-1]) difference() { | 417 | translate([0,0,-1]) difference() { |
417 | cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2); | 418 | cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2); |
418 | translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1]) | 419 | translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1]) |
419 | cube([bore_d+2,bore_d/2,knob_bore_l+4]); | 420 | cube([bore_d+2,bore_d/2,knob_bore_l+4]); |
420 | } | 421 | } |
421 | } | 422 | } |
422 | } | 423 | } |
423 | difference() { | 424 | difference() { |
424 | hull() { | 425 | hull() { |
425 | cylinder(d=gearbox_d-2*ch,h=knob_h,$fn=fnd*gearbox_d); | 426 | cylinder(d=gearbox_d-2*ch,h=knob_h,$fn=fnd*gearbox_d); |
426 | translate([0,0,ch]) | 427 | translate([0,0,ch]) |
427 | cylinder(d=gearbox_d,h=knob_h-2*ch,$fn=fnd*gearbox_d); | 428 | cylinder(d=gearbox_d,h=knob_h-2*ch,$fn=fnd*gearbox_d); |
428 | } | 429 | } |
429 | for(a=[0:360/knob_indents:359]) rotate([0,0,a]) | 430 | for(a=[0:360/knob_indents:359]) rotate([0,0,a]) |
430 | translate([0,gearbox_d/2,-1]) | 431 | translate([0,gearbox_d/2,-1]) |
431 | cylinder(d=knob_indent_d,h=knob_h+2,$fn=fnd*knob_indent_d); | 432 | cylinder(d=knob_indent_d,h=knob_h+2,$fn=fnd*knob_indent_d); |
433 | translate([0,0,-body_h-epsilon]) knob_label(); | ||
432 | } | 434 | } |
433 | } | 435 | } |
434 | }//knob module | 436 | }//knob module |
437 | module knob_label() { | ||
438 | if(knob_label) { | ||
439 | ll = len(knob_label); | ||
440 | lsl = gearbox_d-knob_indent_d; | ||
441 | ts = knob_label_size?knob_label_size:min(lsl/ll,gearbox_d/4); | ||
442 | translate([0,0,body_h+epsilon+knob_h-knob_label_thickness]) | ||
443 | linear_extrude(height=knob_label_thickness+epsilon,convexity=64) | ||
444 | mirror([left?0:1,0]) | ||
445 | text(text=knob_label,size=ts,halign="center",valign="center",font="Arial Black"); | ||
446 | } | ||
447 | } | ||
435 | 448 | ||
436 | module debug() { | 449 | module debug() { |
437 | difference() { | 450 | difference() { |
438 | children(); | 451 | children(); |
439 | if(debug) { | 452 | if(debug) { |
440 | // spring tensioner debug cutout | 453 | // spring tensioner debug cutout |
441 | translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) | 454 | translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) |
442 | translate([0,-lever_thickness/2-1,-gearbox_d]) | 455 | translate([0,-lever_thickness/2-1,-gearbox_d]) |
443 | cube(size=[body_h/2+1,lever_thickness/2+1,gearbox_d+2]); | 456 | cube(size=[body_h/2+1,lever_thickness/2+1,gearbox_d+2]); |
444 | // lever axis debug cutout | 457 | // lever axis debug cutout |
445 | translate([mount_d/2,0,-1]) | 458 | translate([mount_d/2,0,-1]) |
446 | rotate([0,0,-45]) | 459 | rotate([0,0,-45]) |
447 | cube(size=[gearbox_d-mount_d,gearbox_d-mount_d,body_h+knob_h+2]); | 460 | cube(size=[gearbox_d-mount_d,gearbox_d-mount_d,body_h+knob_h+2]); |
448 | // idler debug cutout | 461 | // idler debug cutout |
449 | translate([0,0,ls_z]) | 462 | translate([0,0,ls_z]) |
450 | place_idler() | 463 | place_idler() |
451 | rotate([0,0,-45]) | 464 | rotate([0,0,-45]) |
452 | translate([0,0,-lever_thickness/2-epsilon]) | 465 | translate([0,0,-lever_thickness/2-epsilon]) |
453 | cube(size=[lsd*sqrt(2)/2+1,lsd*sqrt(2)/2+1, | 466 | cube(size=[lsd*sqrt(2)/2+1,lsd*sqrt(2)/2+1, |
454 | lever_thickness+2*epsilon]); | 467 | lever_thickness+2*epsilon]); |
455 | // pushfit debug cutout | 468 | // pushfit debug cutout |
456 | place_idler() | 469 | place_idler() |
457 | translate([-idler_d/2+filament_offset,0,ls_z]) | 470 | translate([-idler_d/2+filament_offset,0,ls_z]) |
458 | cube(size=[gearbox_d/2,gearbox_d/2+pf_h(pf),body_h-ls_z+knob_h+1]); | 471 | cube(size=[gearbox_d/2,gearbox_d/2+pf_h(pf),body_h-ls_z+knob_h+1]); |
459 | }//if debug | 472 | }//if debug |
460 | }//difference | 473 | }//difference |
461 | } | 474 | } |
462 | 475 | ||
463 | mirrorleft() | 476 | mirrorleft() |
464 | debug() | 477 | debug() |
465 | if(what=="lever") color("green",0.7) lever(); | 478 | if(what=="lever") color("green",0.7) lever(); |
466 | else if(what=="body") color("yellow",0.7) body(); | 479 | else if(what=="body") color("yellow",0.7) body(); |
467 | else if(what=="body.label") color("brown",0.7) body_label(); | 480 | else if(what=="body.label") color("brown",0.7) body_label(); |
468 | else if(what=="knob") color("red",0.7) knob(); | 481 | else if(what=="knob") color("red",0.7) knob(); |
469 | else if(what=="springpad") color("blue",0.7) springpad(); | 482 | else if(what=="springpad") color("blue",0.7) springpad(); |
470 | else if(what=="both") { | 483 | else if(what=="both") { |
471 | color("green",0.7) lever(); | 484 | color("green",0.7) lever(); |
472 | color("yellow",0.7) body(); | 485 | color("yellow",0.7) body(); |
473 | color("brown",0.7) body_label(); | 486 | color("brown",0.7) body_label(); |
474 | }else{ | 487 | }else{ |
475 | color("green",0.7) lever(); | 488 | color("green",0.7) lever(); |
476 | color("yellow",0.7) body(); | 489 | color("yellow",0.7) body(); |
477 | color("red",0.7) knob(); | 490 | color("red",0.7) knob(); |
491 | color("brown",0.7) knob_label(); | ||
478 | color("blue",0.7) springpad(); | 492 | color("blue",0.7) springpad(); |
479 | } | 493 | } |
480 | } | 494 | } |
481 | 495 | ||
482 | the_extruder(what="*",left=false,debug=true); | 496 | the_extruder(what="*",left=false,debug=true); |