-rw-r--r-- | another.scad | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/another.scad b/another.scad index 92187c5..8ba0d58 100644 --- a/another.scad +++ b/another.scad | |||
@@ -39,96 +39,98 @@ module the_extruder( | |||
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 | knob_label = "another", knob_label_thickness = 2*layer_height, knob_label_size=undef, |
71 | 71 | ||
72 | what="lever", // lever|body|knob|springpad|* | 72 | what="lever", // lever|body|knob|springpad|* |
73 | left=false, | 73 | left=false, |
74 | vitamins = true, | 74 | vitamins = true, |
75 | bridges = true, | 75 | bridges = true, |
76 | debug = false, | 76 | debug = false, |
77 | ) { | 77 | ) { |
78 | fnd = 2*PI; fnr = 2*fnd; | 78 | fnd = 2*PI; fnr = 2*fnd; |
79 | function lu(m,k) = m[search([k],m)[0]][1]; | 79 | function lu(m,k) = m[search([k],m)[0]][1]; |
80 | 80 | ||
81 | pulley_d = lu(pulley,"d"); | 81 | pulley_d = lu(pulley,"d"); |
82 | pulley_h = lu(pulley,"h"); | 82 | pulley_h = lu(pulley,"h"); |
83 | teeth_elevation = lu(pulley,"fe"); | 83 | teeth_elevation = lu(pulley,"fe"); |
84 | filament_offset = lu(pulley,"g")+filament_d/2; | 84 | filament_offset = lu(pulley,"g")+filament_d/2; |
85 | pulley_d_clearance = lu(pulley,"ssrc")*2; | 85 | pulley_d_clearance = lu(pulley,"ssrc")*2; |
86 | 86 | ||
87 | sp_ch = st_split_w; | ||
88 | |||
87 | idler_filament_offset = filament_path_d/2; | 89 | idler_filament_offset = filament_path_d/2; |
88 | lever_shell = mount_screwhead_h+0.5; | 90 | lever_shell = mount_screwhead_h+0.5; |
89 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); | 91 | lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); |
90 | lsd = idler_d-idler_clearance*2; // the diameter of lever thingie | 92 | lsd = idler_d-idler_clearance*2; // the diameter of lever thingie |
91 | longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell; | 93 | longwing=(mount_d+mount_screw_d+mount_screw_d_tolerance+spring_d+spring_d_clearance)/2+min_xy_shell; |
92 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) | 94 | shortwing = let(a=mount_d/2,c=(pulley_d+idler_d)/2/sqrt(2)) |
93 | sqrt(c*c+pow(a-c,2)); | 95 | sqrt(c*c+pow(a-c,2)); |
94 | longwing_travel = idler_travel*longwing/shortwing; | 96 | longwing_travel = idler_travel*longwing/shortwing; |
95 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); | 97 | h_ = (pulley_d+idler_d)/(2*sqrt(2)); |
96 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); | 98 | ri = sqrt( pow(h_,2) + pow(mount_d/2-h_,2) ); |
97 | spring_dl = idler_travel*longwing/ri; | 99 | spring_dl = idler_travel*longwing/ri; |
98 | // finger and spring support width | 100 | // finger and spring support width |
99 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); | 101 | fsw = gearbox_d-(gearbox_d-mount_d)/2-max(spring_lc,longwing_travel+(gearbox_d-mount_d)/2); |
100 | 102 | ||
101 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; | 103 | mount_min_depth = mounthole_min_depth ? mounthole_min_depth : mounthole_depth-1; |
102 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; | 104 | mount_max_depth = mounthole_max_depth ? mounthole_max_depth : mounthole_depth+1; |
103 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; | 105 | filament_elevation=protrusion_h+pulley_elevation+teeth_elevation; |
104 | ls_z = filament_elevation; // leverspace mid-z | 106 | ls_z = filament_elevation; // leverspace mid-z |
105 | ls_h = lever_thickness+lever_v_clearance; // leverspace height | 107 | ls_h = lever_thickness+lever_v_clearance; // leverspace height |
106 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); | 108 | mount_depth = mount_screw_l - (ls_z+ls_h/2+min_z_shell); |
107 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); | 109 | body_h = max(protrusion_h+bore_l,mount_screw_l-mount_depth+mount_screwhead_h+min_z_shell,ls_z*2); |
108 | echo("mount depth",mount_depth); | 110 | echo("mount depth",mount_depth); |
109 | 111 | ||
110 | pf_offset = mount_d/sqrt(2)/2+mount_screw_d/2+min_xy_shell; | 112 | pf_offset = mount_d/sqrt(2)/2+mount_screw_d/2+min_xy_shell; |
111 | 113 | ||
112 | module teardrop(r,d,h,center=false,angle=45) { | 114 | module teardrop(r,d,h,center=false,angle=45) { |
113 | dd = d ? d : (2*r); | 115 | dd = d ? d : (2*r); |
114 | $fn = dd*fnd; | 116 | $fn = dd*fnd; |
115 | cylinder(d=dd,h=h,center=center); | 117 | cylinder(d=dd,h=h,center=center); |
116 | if(angle>0) translate([0,0,center?-h/2:0]) | 118 | if(angle>0) translate([0,0,center?-h/2:0]) |
117 | rotate([0,0,angle]) | 119 | rotate([0,0,angle]) |
118 | cube(size=[d/2,d/2,h]); | 120 | cube(size=[d/2,d/2,h]); |
119 | } | 121 | } |
120 | 122 | ||
121 | module mirrorleft() { | 123 | module mirrorleft() { |
122 | mirror([left?0:1,0,0]) children(); | 124 | mirror([left?0:1,0,0]) children(); |
123 | } | 125 | } |
124 | module place_idler() { | 126 | module place_idler() { |
125 | rotate([0,0,45]) | 127 | rotate([0,0,45]) |
126 | translate([(pulley_d+idler_d)/2,0,0]) | 128 | translate([(pulley_d+idler_d)/2,0,0]) |
127 | children(); | 129 | children(); |
128 | } | 130 | } |
129 | module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { | 131 | module finger_indent(d=lever_thickness,depth/*=1*/,r/*=15*/) { |
130 | if(depth) { | 132 | if(depth) { |
131 | hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); | 133 | hh = (-4*pow(depth,2)+pow(d,2))/(8*depth); |
132 | rr = depth+hh; | 134 | rr = depth+hh; |
133 | translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr); | 135 | translate([0,0,hh]) sphere(r=rr,$fn=fnr*rr); |
134 | }else if(r) { | 136 | }else if(r) { |
@@ -313,139 +315,142 @@ module the_extruder( | |||
313 | rotate([0,0,45]) | 315 | rotate([0,0,45]) |
314 | rotate_extrude(angle=90,$fn=fnr*(shortwing+(idler_d+idler_clearance)/2)) | 316 | rotate_extrude(angle=90,$fn=fnr*(shortwing+(idler_d+idler_clearance)/2)) |
315 | square([shortwing+(idler_d+idler_clearance)/2,ls_h]); | 317 | square([shortwing+(idler_d+idler_clearance)/2,ls_h]); |
316 | // idler itself | 318 | // idler itself |
317 | place_idler() | 319 | place_idler() |
318 | cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance)); | 320 | cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance)); |
319 | // lever space | 321 | // lever space |
320 | rotate([0,0,45]) | 322 | rotate([0,0,45]) |
321 | rotate_extrude(angle=-135+max(atan(2*fsw/gearbox_d-1),atan(gearbox_d/mount_d-1))) | 323 | rotate_extrude(angle=-135+max(atan(2*fsw/gearbox_d-1),atan(gearbox_d/mount_d-1))) |
322 | square([gearbox_d/2+1,ls_h]); | 324 | square([gearbox_d/2+1,ls_h]); |
323 | } | 325 | } |
324 | 326 | ||
325 | // back side cutout | 327 | // back side cutout |
326 | // XXX: this is somewhat ugly and potentially bugged, | 328 | // XXX: this is somewhat ugly and potentially bugged, |
327 | // but I want to sleep. | 329 | // but I want to sleep. |
328 | a0_ = atan( | 330 | a0_ = atan( |
329 | (pf_offset+pf_h(pf)+gearbox_d/2) | 331 | (pf_offset+pf_h(pf)+gearbox_d/2) |
330 | / | 332 | / |
331 | ( | 333 | ( |
332 | pulley_d/2+filament_offset- | 334 | pulley_d/2+filament_offset- |
333 | (pf_d(pf)+2*pf_shell)/2/cos(30) | 335 | (pf_d(pf)+2*pf_shell)/2/cos(30) |
334 | ) | 336 | ) |
335 | ); | 337 | ); |
336 | a0 = -135 + ( (a0_>0) ? a0_ : 180+a0_ ); | 338 | a0 = -135 + ( (a0_>0) ? a0_ : 180+a0_ ); |
337 | a1 = atan((longwing-lever_thickness/2)/(gearbox_d/2)); | 339 | a1 = atan((longwing-lever_thickness/2)/(gearbox_d/2)); |
338 | translate([0,0,ls_z]) difference() { | 340 | translate([0,0,ls_z]) difference() { |
339 | rotate([0,0,-180+a0]) | 341 | rotate([0,0,-180+a0]) |
340 | rotate_extrude(angle=a1-a0) | 342 | rotate_extrude(angle=a1-a0) |
341 | translate([0,-ls_h/2]) | 343 | translate([0,-ls_h/2]) |
342 | square([sqrt(pow(gearbox_d/2,2)+pow(longwing-lever_thickness/2,2))+1, | 344 | square([sqrt(pow(gearbox_d/2,2)+pow(longwing-lever_thickness/2,2))+1, |
343 | ls_h]); | 345 | ls_h]); |
344 | translate([-mount_d/2,0,0]) | 346 | translate([-mount_d/2,0,0]) |
345 | cylinder(d=gearbox_d-mount_d,h=ls_h+2,center=true,$fn=fnd*(gearbox_d-mount_d)); | 347 | cylinder(d=gearbox_d-mount_d,h=ls_h+2,center=true,$fn=fnd*(gearbox_d-mount_d)); |
346 | }//difference translate | 348 | }//difference translate |
347 | 349 | ||
348 | // spring tensioner | 350 | // spring tensioner |
349 | translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) { | 351 | translate([-gearbox_d/2,-longwing,ls_z]) rotate([0,-90,0]) { |
350 | mirror([0,0,1]) { | 352 | mirror([0,0,1]) { |
351 | translate([0,0,st_thickshell]) | 353 | translate([0,0,st_thickshell]) |
352 | hull() for(o=[0,spring_d]) translate([0,-o,0]) | 354 | hull() for(o=[0,spring_d]) translate([0,-o,0]) |
353 | rotate([0,0,30]) | 355 | rotate([0,0,30]) |
354 | cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6); | 356 | cylinder(d=st_nut_d+st_nut_d_tolerance,h=st_nut_h+st_nut_h_tolerance,$fn=6); |
355 | translate([0,0,-1]) cylinder(d=st_screw_d+st_screw_d_tolerance,h=fsw+2,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); | 357 | 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)); |
356 | bigd = spring_d+spring_d_clearance; | 358 | bigd = spring_d+spring_d_clearance; |
357 | hf = (bigd-st_screw_d-st_screw_d_tolerance)/2; | 359 | hf = (bigd-st_screw_d-st_screw_d_tolerance)/2; |
358 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon]) { | 360 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell-epsilon]) { |
359 | cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd, | 361 | cylinder(d1=st_screw_d+st_screw_d_tolerance,d2=bigd, |
360 | h=hf+epsilon, $fn=fnd*bigd); | 362 | h=hf+epsilon, $fn=fnd*bigd); |
361 | translate([0,-(st_split_w+st_split_w_tolerance)/2,0]) | 363 | translate([0,-(st_split_w+st_split_w_tolerance)/2,0]) hull() { |
362 | cube(size=[body_h-ls_z+1,st_split_w+st_split_w_tolerance,fsw+1]); | 364 | cube(size=[body_h-ls_z-sp_ch-st_split_w_tolerance,st_split_w+st_split_w_tolerance,fsw+1]); |
365 | translate([0,0,sp_ch+st_split_w_tolerance+1]) | ||
366 | cube(size=[body_h-ls_z+1,st_split_w+st_split_w_tolerance,fsw+1]); | ||
367 | } | ||
363 | }//translate | 368 | }//translate |
364 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon]) | 369 | translate([0,0,st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+hf-epsilon]) |
365 | cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd); | 370 | cylinder(d=bigd,h=fsw+1,$fn=fnd*bigd); |
366 | }//mirror | 371 | }//mirror |
367 | }//translate | 372 | }//translate |
368 | 373 | ||
369 | // label | 374 | // label |
370 | body_label(); | 375 | body_label(); |
371 | 376 | ||
372 | }//difference | 377 | }//difference |
373 | 378 | ||
374 | }//body module | 379 | }//body module |
375 | module body_label() { | 380 | module body_label() { |
376 | if(body_label) { | 381 | if(body_label) { |
377 | label=body_label; | 382 | label=body_label; |
378 | label_thickness=body_label_thickness; | 383 | label_thickness=body_label_thickness; |
379 | label_len = len(label); | 384 | label_len = len(label); |
380 | labelspace = [gearbox_d/2-mount_screwhead_d/2-min_xy_shell,longwing-(mount_screwhead_d-st_split_w-st_split_w_tolerance)/2-2*min_xy_shell]; | 385 | labelspace = [gearbox_d/2-mount_screwhead_d/2-min_xy_shell,longwing-(mount_screwhead_d-st_split_w-st_split_w_tolerance)/2-2*min_xy_shell]; |
381 | translate([0,0,body_h-label_thickness]) | 386 | translate([0,0,body_h-label_thickness]) |
382 | linear_extrude(height=label_thickness+epsilon,convexity=64) | 387 | linear_extrude(height=label_thickness+epsilon,convexity=64) |
383 | translate([-mount_screwhead_d/2-min_xy_shell-labelspace.x/2,-longwing+(st_split_w+st_split_w_tolerance)/2+min_xy_shell+labelspace.y/2]) | 388 | translate([-mount_screwhead_d/2-min_xy_shell-labelspace.x/2,-longwing+(st_split_w+st_split_w_tolerance)/2+min_xy_shell+labelspace.y/2]) |
384 | mirror([left?0:1,0]) | 389 | mirror([left?0:1,0]) |
385 | text(text=label,size=labelspace.x/label_len,halign="center",valign="center",font="Arial Black"); | 390 | text(text=label,size=labelspace.x/label_len,halign="center",valign="center",font="Arial Black"); |
386 | }else sphere(d=epsilon); // to avoid makefile breakage | 391 | }else sphere(d=epsilon); // to avoid makefile breakage |
387 | } | 392 | } |
388 | 393 | ||
389 | module springpad() { | 394 | module springpad() { |
390 | smalld=st_screw_d+st_screw_d_tolerance+min_xy_shell; | 395 | smalld=st_screw_d+st_screw_d_tolerance+min_xy_shell; |
391 | bigd = spring_d+spring_d_clearance/2; | 396 | bigd = spring_d+spring_d_clearance/2; |
392 | hf = (bigd-smalld)/2; | 397 | hf = (bigd-smalld)/2; |
393 | h = max(hf,fsw-st_screw_l+hf); | 398 | h = max(hf,fsw-st_screw_l+hf); |
394 | translate([-gearbox_d/2+fsw-h,-longwing,filament_elevation]) | 399 | translate([-gearbox_d/2+fsw-h,-longwing,filament_elevation]) |
395 | rotate([0,90,0]) difference() { | 400 | rotate([0,90,0]) difference() { |
396 | union() { | 401 | union() { |
397 | cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); | 402 | cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); |
398 | translate([0,0,hf-epsilon]) | 403 | translate([0,0,hf-epsilon]) |
399 | cylinder(d=bigd,h=h-hf,$fn=fnd*bigd); | 404 | cylinder(d=bigd,h=h-hf,$fn=fnd*bigd); |
400 | translate([0,0,h]) | 405 | translate([0,0,h]) |
401 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); | 406 | sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); |
402 | l = body_h-ls_z; | 407 | l = body_h-ls_z; |
403 | w = st_split_w; | 408 | w = sp_ch; |
404 | hull() translate([0,-st_split_w/2,0]) mirror([1,0,0]) { | 409 | hull() translate([0,-st_split_w/2,0]) mirror([1,0,0]) { |
405 | translate([0,0,w]) | 410 | translate([0,0,w]) |
406 | cube(size=[l,st_split_w,w]); | 411 | cube(size=[l,st_split_w,w]); |
407 | cube(size=[l-w,st_split_w,2*w]); | 412 | cube(size=[l-w,st_split_w,2*w]); |
408 | } | 413 | } |
409 | } | 414 | } |
410 | translate([0,0,-epsilon]) | 415 | translate([0,0,-epsilon]) |
411 | cylinder(d=st_screw_d+st_screw_d_tolerance,h=st_screw_l-fsw+h+2*epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); | 416 | cylinder(d=st_screw_d+st_screw_d_tolerance,h=st_screw_l-fsw+h+2*epsilon,$fn=fnd*(st_screw_d+st_screw_d_tolerance)); |
412 | } | 417 | } |
413 | } | 418 | } |
414 | 419 | ||
415 | module knob() { | 420 | module knob() { |
416 | ch = knob_indent_d/2; | 421 | ch = knob_indent_d/2; |
417 | knob_bore_l = body_h-protrusion_h-pulley_elevation-pulley_h-knob_v_clearance; | 422 | knob_bore_l = body_h-protrusion_h-pulley_elevation-pulley_h-knob_v_clearance; |
418 | translate([0,0,body_h+epsilon]) { | 423 | translate([0,0,body_h+epsilon]) { |
419 | mirror([0,0,1]) translate([0,0,-epsilon]) { | 424 | mirror([0,0,1]) translate([0,0,-epsilon]) { |
420 | difference() { | 425 | difference() { |
421 | cylinder(d=pulley_d,h=knob_bore_l,$fn=fnd*pulley_d); | 426 | cylinder(d=pulley_d,h=knob_bore_l,$fn=fnd*pulley_d); |
422 | translate([0,0,-1]) difference() { | 427 | translate([0,0,-1]) difference() { |
423 | cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2); | 428 | cylinder(d=bore_d+knob_bore_d_tolerance,h=knob_bore_l+2); |
424 | translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1]) | 429 | translate([-bore_d/2-1,bore_dd-bore_d/2+knob_bore_d_tolerance/2,-1]) |
425 | cube([bore_d+2,bore_d/2,knob_bore_l+4]); | 430 | cube([bore_d+2,bore_d/2,knob_bore_l+4]); |
426 | } | 431 | } |
427 | } | 432 | } |
428 | } | 433 | } |
429 | difference() { | 434 | difference() { |
430 | hull() { | 435 | hull() { |
431 | cylinder(d=gearbox_d-2*ch,h=knob_h,$fn=fnd*gearbox_d); | 436 | cylinder(d=gearbox_d-2*ch,h=knob_h,$fn=fnd*gearbox_d); |
432 | translate([0,0,ch]) | 437 | translate([0,0,ch]) |
433 | cylinder(d=gearbox_d,h=knob_h-2*ch,$fn=fnd*gearbox_d); | 438 | cylinder(d=gearbox_d,h=knob_h-2*ch,$fn=fnd*gearbox_d); |
434 | } | 439 | } |
435 | for(a=[0:360/knob_indents:359]) rotate([0,0,a]) | 440 | for(a=[0:360/knob_indents:359]) rotate([0,0,a]) |
436 | translate([0,gearbox_d/2,-1]) | 441 | translate([0,gearbox_d/2,-1]) |
437 | cylinder(d=knob_indent_d,h=knob_h+2,$fn=fnd*knob_indent_d); | 442 | cylinder(d=knob_indent_d,h=knob_h+2,$fn=fnd*knob_indent_d); |
438 | translate([0,0,-body_h-epsilon]) knob_label(); | 443 | translate([0,0,-body_h-epsilon]) knob_label(); |
439 | } | 444 | } |
440 | } | 445 | } |
441 | }//knob module | 446 | }//knob module |
442 | module knob_label() { | 447 | module knob_label() { |
443 | if(knob_label) { | 448 | if(knob_label) { |
444 | ll = len(knob_label); | 449 | ll = len(knob_label); |
445 | lsl = gearbox_d-knob_indent_d; | 450 | lsl = gearbox_d-knob_indent_d; |
446 | ts = knob_label_size?knob_label_size:min(lsl/ll,gearbox_d/4); | 451 | ts = knob_label_size?knob_label_size:min(lsl/ll,gearbox_d/4); |
447 | translate([0,0,body_h+epsilon+knob_h-knob_label_thickness]) | 452 | translate([0,0,body_h+epsilon+knob_h-knob_label_thickness]) |
448 | linear_extrude(height=knob_label_thickness+epsilon,convexity=64) | 453 | linear_extrude(height=knob_label_thickness+epsilon,convexity=64) |
449 | mirror([left?0:1,0]) | 454 | mirror([left?0:1,0]) |
450 | text(text=knob_label,size=ts,halign="center",valign="center",font="Arial Black"); | 455 | text(text=knob_label,size=ts,halign="center",valign="center",font="Arial Black"); |
451 | }else sphere(d=epsilon); // to avoid makefile breakage | 456 | }else sphere(d=epsilon); // to avoid makefile breakage |