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authorMichael Krelin <hacker@klever.net>2018-08-13 10:20:13 (UTC)
committer Michael Krelin <hacker@klever.net>2018-08-13 10:20:13 (UTC)
commitfc213f6b29f62795ce33d0e0acdea1e6a6b0fffb (patch) (unidiff)
tree8d31638a3d7935017ea730ebf18d7413cedb422d
parente33d88e915e10aa7c127a75482e1210313c29add (diff)
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be explicit about pulley clearance
I would've thought it's radial…
Diffstat (more/less context) (ignore whitespace changes)
-rw-r--r--another.scad6
1 files changed, 3 insertions, 3 deletions
diff --git a/another.scad b/another.scad
index 50b3a84..6afa9ef 100644
--- a/another.scad
+++ b/another.scad
@@ -29,49 +29,49 @@ module the_extruder(
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_bore_l = 4, 32 knob_bore_l = 4,
33 knob_indent_d = 4, 33 knob_indent_d = 4,
34 knob_indents = 12, 34 knob_indents = 12,
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 = 4*extrusion_width, 38 st_thickshell = 8*extrusion_width, st_thinshell = 4*extrusion_width,
39 39
40 // screw it 40 // screw it
41 mount_screw_d = 3.1, mount_screw_l = 20, 41 mount_screw_d = 3.1, mount_screw_l = 20,
42 mount_screwhead_d=6, mount_screwhead_h=3, 42 mount_screwhead_d=6, mount_screwhead_h=3,
43 idler_screw_d = 3, 43 idler_screw_d = 3,
44 idler_screwhead_d=6, idler_screwhead_h=3, 44 idler_screwhead_d=6, idler_screwhead_h=3,
45 45
46 pf = pushfit_embeddest, 46 pf = pushfit_embeddest,
47 pf_shell = max(3*layer_height,3*extrusion_width), 47 pf_shell = max(3*layer_height,3*extrusion_width),
48 pf_smooth = true, 48 pf_smooth = true,
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=1, 52 idler_clearance=1,
53 pulley_clearance=2, 53 pulley_d_clearance=2,
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=.6, 60 knob_bore_d_tolerance=.6,
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 64
65 what="lever", // lever|body|knob|springpad|* 65 what="lever", // lever|body|knob|springpad|*
66 left=false, 66 left=false,
67 vitamins = true, 67 vitamins = true,
68 supports = false, bridges = true, 68 supports = false, bridges = true,
69 tensioner = true, 69 tensioner = true,
70 debug = false 70 debug = false
71) { 71) {
72 fnd = 2*PI; fnr = 2*fnd; 72 fnd = 2*PI; fnr = 2*fnd;
73 73
74 idler_filament_offset = filament_path_d/2; // -filament_offset; 74 idler_filament_offset = filament_path_d/2; // -filament_offset;
75 lever_shell = mount_screwhead_h+0.5; 75 lever_shell = mount_screwhead_h+0.5;
76 lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell); 76 lever_thickness=max(spring_d+spring_d_clearance+layer_height*8,idler_h+idler_v_tolerance+2*lever_shell);
77 lsd = idler_d-idler_clearance*2; 77 lsd = idler_d-idler_clearance*2;
@@ -288,49 +288,49 @@ module the_extruder(
288 cylinder(d=protrusion_d+protrusion_tolerance_h,h=protrusion_h+protrusion_tolerance_v+1,$fn=fnd*(protrusion_d+protrusion_tolerance_h)); 288 cylinder(d=protrusion_d+protrusion_tolerance_h,h=protrusion_h+protrusion_tolerance_v+1,$fn=fnd*(protrusion_d+protrusion_tolerance_h));
289 // mount screw holes 289 // mount screw holes
290 for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) { 290 for(zr=[0:90:359]) rotate([0,0,zr]) translate([mount_d/2,0,0]) {
291 translate([0,0,mount_screw_l-mounthole_depth/2-(bridges?layer_height:-epsilon)]) 291 translate([0,0,mount_screw_l-mounthole_depth/2-(bridges?layer_height:-epsilon)])
292 mirror([0,0,1]) 292 mirror([0,0,1])
293 cylinder(d=mount_screw_d+mount_screw_d_tolerance, 293 cylinder(d=mount_screw_d+mount_screw_d_tolerance,
294 h=mount_screw_l-mounthole_depth/2+1, 294 h=mount_screw_l-mounthole_depth/2+1,
295 $fn=fnd*(mount_screw_d+mount_screw_d_tolerance)); 295 $fn=fnd*(mount_screw_d+mount_screw_d_tolerance));
296 translate([0,0,mount_screw_l-mounthole_depth/2]) 296 translate([0,0,mount_screw_l-mounthole_depth/2])
297 cylinder(d=mount_screwhead_d,h=body_h+1,$fn=fnd*mount_screwhead_d); 297 cylinder(d=mount_screwhead_d,h=body_h+1,$fn=fnd*mount_screwhead_d);
298 }//for 298 }//for
299 // pushfit 299 // pushfit
300 translate([0,0,filament_elevation]) 300 translate([0,0,filament_elevation])
301 rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0]) 301 rotate([0,0,45]) translate([pulley_d/2+filament_offset,0,0])
302 rotate([-90,0,0]) 302 rotate([-90,0,0])
303 translate([0,0,mount_d/sqrt(2)/2+mount_screw_d+epsilon]) 303 translate([0,0,mount_d/sqrt(2)/2+mount_screw_d+epsilon])
304 rotate([0,0,180]) { 304 rotate([0,0,180]) {
305 pushfit(pf); 305 pushfit(pf);
306 cylinder(d=filament_guide_d,h=gearbox_d,center=true,$fn=fnd*filament_guide_d); 306 cylinder(d=filament_guide_d,h=gearbox_d,center=true,$fn=fnd*filament_guide_d);
307 translate([0,-filament_guide_d/2/sqrt(2),0]) 307 translate([0,-filament_guide_d/2/sqrt(2),0])
308 rotate([0,0,45]) 308 rotate([0,0,45])
309 cube(size=[filament_guide_d/2,filament_guide_d/2,gearbox_d],center=true); 309 cube(size=[filament_guide_d/2,filament_guide_d/2,gearbox_d],center=true);
310 }//rotate translate rotate translate rotate translate 310 }//rotate translate rotate translate rotate translate
311 // pulley 311 // pulley
312 cylinder(d=pulley_d+pulley_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_clearance)); 312 cylinder(d=pulley_d+pulley_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance));
313 // leverspace 313 // leverspace
314 hull() for(x=[0,gearbox_d]) 314 hull() for(x=[0,gearbox_d])
315 rotate([0,0,45]) 315 rotate([0,0,45])
316 translate([x,0,ls_z-ls_h/2]) 316 translate([x,0,ls_z-ls_h/2])
317 cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance)); 317 cylinder(d=idler_d+idler_clearance,h=ls_h,$fn=fnd*(idler_d+idler_clearance));
318 318
319 // idler clearance 319 // idler clearance
320 a=cos(45)*(pulley_d+idler_d)/2; 320 a=cos(45)*(pulley_d+idler_d)/2;
321 b=mount_d/2-a; 321 b=mount_d/2-a;
322 x=sqrt(pow(a,2)+pow(b,2)); 322 x=sqrt(pow(a,2)+pow(b,2));
323 translate([mount_d/2,0,ls_z]) 323 translate([mount_d/2,0,ls_z])
324 intersection() { 324 intersection() {
325 r = x+idler_d/2+idler_clearance; 325 r = x+idler_d/2+idler_clearance;
326 cylinder(r=r,h=ls_h,center=true); 326 cylinder(r=r,h=ls_h,center=true);
327 translate([-r-1,0,-ls_h/2-1]) cube(size=[2*r+2,r+1,ls_h+2]); 327 translate([-r-1,0,-ls_h/2-1]) cube(size=[2*r+2,r+1,ls_h+2]);
328 } 328 }
329 329
330 // back side cutout 330 // back side cutout
331 // XXX: this is somewhat ugly and potentially bugged, 331 // XXX: this is somewhat ugly and potentially bugged,
332 // but I want to sleep. 332 // but I want to sleep.
333 a0_ = atan( 333 a0_ = atan(
334 (mount_d/sqrt(2)/2+mount_screw_d+pf_h(pf)+gearbox_d/2) 334 (mount_d/sqrt(2)/2+mount_screw_d+pf_h(pf)+gearbox_d/2)
335 / 335 /
336 ( 336 (
@@ -351,49 +351,49 @@ module the_extruder(
351 }//difference translate 351 }//difference translate
352 352
353 rotate([0,0,-45]) 353 rotate([0,0,-45])
354 translate([0,0,ls_z-ls_h/2]) 354 translate([0,0,ls_z-ls_h/2])
355 cube(size=[gearbox_d,gearbox_d,lever_thickness+lever_v_clearance]); 355 cube(size=[gearbox_d,gearbox_d,lever_thickness+lever_v_clearance]);
356 translate([0,0,ls_z-ls_h/2]) { 356 translate([0,0,ls_z-ls_h/2]) {
357 translate([mount_screwhead_d/2,0,0]) 357 translate([mount_screwhead_d/2,0,0])
358 mirror([0,1,0]) 358 mirror([0,1,0])
359 cube(size=[gearbox_d,gearbox_d/2+1,lever_thickness+lever_v_clearance]); 359 cube(size=[gearbox_d,gearbox_d/2+1,lever_thickness+lever_v_clearance]);
360 } 360 }
361 //translate([-mount_d/2,-longwing,filament_elevation]) 361 //translate([-mount_d/2,-longwing,filament_elevation])
362 if(!tensioner) /* XXX: this seems to be bullshit, but it's so old, that it's historical bullshit */ 362 if(!tensioner) /* XXX: this seems to be bullshit, but it's so old, that it's historical bullshit */
363 translate([mount_d/2,-longwing,filament_elevation]) 363 translate([mount_d/2,-longwing,filament_elevation])
364 rotate([0,-90,0]) difference() { 364 rotate([0,-90,0]) difference() {
365 cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=fnd*(spring_d+spring_d_clearance)); 365 cylinder(d=spring_d+spring_d_clearance,h=spring_lc+spring_dl,$fn=fnd*(spring_d+spring_d_clearance));
366 translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4); 366 translate([0,0,spring_lc+spring_dl]) sphere(d=spring_d*3/4,$fn=fnd*spring_d*3/4);
367 } 367 }
368 368
369 }//difference 369 }//difference
370 370
371 if(supports) intersection() { 371 if(supports) intersection() {
372 difference() { 372 difference() {
373 translate([0,0,ls_z-ls_h/2-epsilon]) 373 translate([0,0,ls_z-ls_h/2-epsilon])
374 cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=fnd*gearbox_d); 374 cylinder(d=gearbox_d,h=ls_h+2*epsilon,$fn=fnd*gearbox_d);
375 cylinder(d=pulley_d+pulley_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_clearance)); 375 cylinder(d=pulley_d+pulley_d_clearance,h=body_h+1,$fn=fnd*(pulley_d+pulley_d_clearance));
376 } 376 }
377 // supports 377 // supports
378 // TODO: hardcoded stuff below… 378 // TODO: hardcoded stuff below…
379 if(false) { // parallel 379 if(false) { // parallel
380 for(y=[-gearbox_d:4:gearbox_d]) 380 for(y=[-gearbox_d:4:gearbox_d])
381 translate([0,y-extrusion_width/2,0]) 381 translate([0,y-extrusion_width/2,0])
382 cube(size=[gearbox_d,extrusion_width,body_h]); 382 cube(size=[gearbox_d,extrusion_width,body_h]);
383 }else{ // radial 383 }else{ // radial
384 for(zr=[-65:(65+50)/7:50]) 384 for(zr=[-65:(65+50)/7:50])
385 rotate([0,0,zr]) translate([0,-extrusion_width/2,0]) 385 rotate([0,0,zr]) translate([0,-extrusion_width/2,0])
386 cube(size=[gearbox_d,extrusion_width,body_h]); 386 cube(size=[gearbox_d,extrusion_width,body_h]);
387 } 387 }
388 } 388 }
389 389
390 }//body module 390 }//body module
391 391
392 module springpad() { 392 module springpad() {
393 smalld=st_screw_d+st_screw_d_tolerance+2*extrusion_width; 393 smalld=st_screw_d+st_screw_d_tolerance+2*extrusion_width;
394 bigd = spring_d+spring_d_clearance/2; 394 bigd = spring_d+spring_d_clearance/2;
395 hf = (bigd-smalld)/2; 395 hf = (bigd-smalld)/2;
396 translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation]) 396 translate([-gearbox_d/2+st_thickshell+st_nut_h+st_nut_h_tolerance+st_thinshell+1,-longwing,filament_elevation])
397 rotate([0,90,0]) difference() { 397 rotate([0,90,0]) difference() {
398 union() { 398 union() {
399 cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd); 399 cylinder(d1=smalld,d2=bigd,h=hf,$fn=fnd*bigd);