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-rw-r--r--another.scad11
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
@@ -63,48 +63,50 @@ module the_extruder(
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;
@@ -337,91 +339,94 @@ module the_extruder(
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 }