4 // 3D design for filament spools to hold coils as supplied by Faberdashery
8 // Copyright 2012,2013,2016 Ian Jackson
10 // This work is free software: you can redistribute it and/or modify
11 // it under the terms of the GNU General Public License as published by
12 // the Free Software Foundation, either version 3 of the License, or
13 // (at your option) any later version.
15 // This work is distributed in the hope that it will be useful,
16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 // GNU General Public License for more details.
20 // You should have received a copy of the GNU General Public License
21 // along with this work. If not, see <http://www.gnu.org/licenses/>
25 // Each spool is a hub with 3 or 4 arms. Each arm has a cup for
26 // holding the filament. The effective diameter can be adjusted by
27 // setting the cup into a different seat in the arm. The cups are
28 // held on with simple clips, so the filement coil can easily be
29 // removed and replaced.
31 // This file (and its includes) can generate:
33 // ===== Heavy duty 4-armed spool for 3mm x 100m coil =====
35 // A heavy duty 4-armed spool suitable for holding a 100m
36 // Faberdashery coil on the spool arm of a Lulzbot TAZ-5.
41 // And print following parts
44 // FilamentCup x 4 (or FilamentCupPair x 2)
45 // CupSecuringClip x 4
47 // You will also need 4 x M4 machine screws and nuts.
49 // ===== Light duty 3-armed spool for 3mm x <=30m coil =====
51 // A light duty 3-armed spool suitable for up to around 30m
52 // of Faberdashery 2.85mm PLA.
57 // And print following parts
60 // FilamentCup x 3 (or FilamentCup + FilamentCupPair)
61 // CupSecuringClip x 3
62 // TowerDoveClipPin x 6
64 // When assembling, insert one TowerDoveClipPin from each side,
65 // joining each ArmEnd to the Hub with two TowerDoveClipPins.
66 // Modest force with pliers is good to seat them properly.
68 // (note that the light duty and heavy duty CupSecuringClips
69 // are slightly different)
71 // ===== Notes regarding both the above spools =====
73 // When mounting either spool on the TAZ-5 spool arm, put the `pointy'
74 // end of the hub towards the printer - ie, put put the spool on
75 // `backwards'. This ensures that the spool's arms will clear the
78 // For the above, I generally used the Cura `Standard' PLA profile.
80 // ===== TAZ-5 feed tube adjustment kit =====
82 // With a TAZ-5 I recommend using this kit to improve the feed
87 // And print following parts
88 // FilamentGuideSpacer (ideally, at `high detail')
89 // FilamentGuideArmPrint (optional; `high detail' or `standard')
93 // from Aleph Objects - look here:
94 // http://download.lulzbot.com/TAZ/accessories/tool_heads/version_2/Dual_Extruder_v2/production_parts/stl/
96 // The spacer clips onto the filament guide tube holder arm, on the
97 // inside, with the pointy flanged end towards the filament guide
98 // tube. It stops the filament guide tube angle (and so the
99 // filament's natural pickup location) changing as the print head moves.
101 // The FilamentGuideArm[Print] is a replacement for the arm supplied
102 // with your TAZ-5. It's longer, so that the filament pickup point is
103 // closer to the middle of the coil. Use the t-nut_jig to stop the
104 // T-nuts in the aluminium channel from annoyingly sliding down to the
105 // bottom while you swap out the arm.
107 // (Faberdashery coils, and therefore both the above spools, have a
108 // larger diameter than the flat-walled spools often supplied by other
109 // vendors. And the spools above have individual arms rather than a
110 // continuous disc. If the filament `unhooks' from the arm, it can
111 // pull taught around the hub and stop feeding properly.)
113 // ===== Spool storage arm, for mounting on walls =====
115 // A storage arm suitable for screwing to walls, bookshelves,
116 // etc. (requires non-countersunk M4 screws); will hold two heavy duty
117 // spools each with a 100m coil.
122 // And print one of these, according to taste
126 // NB that the `light duty' version of this is shorter and
127 // will only take two `light duty' spools.
129 // For the above, I used the Cura `High detail' PLA profile because
130 // I wanted it pretty, but the `Standard' profile should do fine.
132 // ===== Spools for 1.75mm filament =====
134 // Spool (in many parts) for handing 1.75mm filament, printable
135 // on, and with parts for mounting on, a Reprappro Huxley.
138 fdia=2.85; // or 1.75
139 lightduty=false; // or true
145 function selsz(sm,lt,lg) = fdia < 2 ? sm : lightduty ? lt : lg;
146 function usedove() = selsz(true,true,false);
148 num_arms = selsz(3,3,4);
150 channelslop=selsz(slop,0.75,slop);
153 hubeffrad = selsz(30, 82, 40);
154 hubbigrad = selsz(20, 38, 38);
155 hublwidth = selsz(3, 2.5, 4);
158 hubaxlerad = selsz(5, 28/2, 28/2);
159 totalheightfromtower = 240;
160 axletowerfudgebend = 0;
161 axleaxlefudgebend = 3;
166 prongthick=selsz(5,4,5);
167 prongwidth=selsz(5,4,5);
169 prongribheight=selsz(0,0,4);
172 ratchettoothheight=5;
173 ratchettoothsmoothr=1;
174 ratchettoothslope=0.75;
176 cupwidth=selsz(40,25,50);
177 cupheight=selsz(55,25,55);
179 cupstrong_dx=selsz(0,0,-10);
190 stalklength=selsz(35,25,55);
195 overclipcupnextgap=selsz(20,15,20);
197 hubaxlelen = selsz(25, 62.5, 77.5);
200 overclipsmaller=-2.5;
207 armendwallthick=selsz(2.5, 1.8, 2.5);
208 armendbasethick=selsz(1.2, 1.2, 1.2);
210 numbers_relief = 0.7;
211 numbers_tick_len = 8;
212 numbers_tick_width = 0.75;
213 numbers_tick_linespc = 1.0;
214 numbers_height_allow = 8;
216 axlehorizoffset = 12.5;
217 axlevertheight = 100;
226 washerthinthick = 0.8;
227 washerverythinthick = 0.4;
228 washerrad = hubaxlerad + 7.5;
229 frictionwasherarmwidth = 3;
230 frictionwasherextrapush = 1.0;
232 ratchetpawl=ratchetstep-ratchettooth-bigslop*2;
234 nondove_armhole_x = 32;
235 nondove_armhole_hole = 4 + 0.8;
236 nondove_armhole_support = 7;
237 nondove_armhole_wall = 3.2;
238 nondove_armhole_slop = 0.5;
239 nondove_armhole_slop_x = 0.5;
241 nondove_armbase = nondove_armhole_x + nondove_armhole_hole/2 +
242 nondove_armhole_support;
243 echo(nondove_armbase);
245 include <doveclip.scad>
246 include <cliphook.scad>
247 include <filamentteeth.scad>
248 include <axlepin.scad>
250 real_exteffrad = selsz(exteffrad,
251 hubeffrad + DoveClip_depth(),
252 hubeffrad + nondove_armbase);
254 channelwidth = prongthick + channelslop;
255 channeldepth = prongwidth + ratchettoothheight;
256 totalwidth = armendwallthick*2 + channelwidth;
257 totalheight = channeldepth + armendbasethick;
258 stalkwidth = prongwidth + prongstalkxwidth;
262 module ArmEnd(length=armend_length){ ////toplevel
264 translate([ratchettoothsmoothr, channelwidth/2, -armendbasethick]) {
266 DoveClipPairBase(h=doveclipheight);
270 translate([1, -armendwallthick, -armendbasethick])
272 cube([nondove_armbase+1, totalwidth, totalheight]);
273 translate([-nondove_armbase + nondove_armhole_x,
274 -armendwallthick + totalwidth/2,
275 -armendbasethick -1])
276 cylinder(r= nondove_armhole_hole/2, h=totalheight+2, $fn=10);
280 for (otherside=[0,1]) {
281 for (circum = [300:100:1500]) {
282 assign(rad = circum / tau)
283 assign(fn = str("filamentspool-number-n",circum,".dxf"))
284 assign(rotateoffset = [0, totalwidth/2, 0])
285 assign(xlen = rad - real_exteffrad) {
286 if (xlen >= numbers_tick_width/2
287 + (otherside ? numbers_height_allow : 0) &&
288 xlen <= length - (otherside ? 0 : numbers_height_allow))
289 translate([xlen, -armendwallthick,
290 -armendbasethick + (totalheight - numbers_tick_len)/2])
291 translate(rotateoffset)
292 rotate([0,0, otherside*180])
293 translate(-rotateoffset){
294 translate([-numbers_tick_width/2, -1, 0])
295 cube([numbers_tick_width, numbers_relief+1, numbers_tick_len]);
296 translate([numbers_tick_width/2 + numbers_tick_linespc,
301 linear_extrude(height= numbers_relief+1)
302 // scale(templatescale)
303 import(file=fn, convexity=100);
310 translate([0, -armendwallthick, -armendbasethick])
311 cube([length, totalwidth, totalheight]);
312 translate([-1, 0, 0])
313 cube([length+1 - ratchettooth, channelwidth, channeldepth+1]);
314 translate([-1, 0, ratchettoothheight])
315 cube([length+2, channelwidth, channeldepth+1]);
317 for (dx = [0 : ratchetstep : length - ratchetstep]) translate([dx,0,0]) {
318 translate([ratchettoothsmoothr+0.5, armendwallthick/2, 0]) minkowski(){
320 cylinder($fn=20, r=ratchettoothsmoothr, h=armendwallthick);
321 multmatrix([ [ 1, 0, ratchettoothslope, 0 ],
325 cube([ratchettooth - ratchettoothsmoothr*2,
326 channelwidth, ratchettoothheight - ratchettoothsmoothr]);
331 module FilamentCupHandle(){
332 pawlusewidth = ratchetpawl-ratchettoothsmoothr*2;
334 cube([stalklength, stalkwidth, prongthick]);
335 translate([stalklength, stalkwidth/2, 0])
336 cylinder(r=stalkwidth/2, h=prongthick, $fn=20);
337 translate([ratchettoothsmoothr, stalkwidth, 0]) {
339 cylinder($fn=20,r=ratchettoothsmoothr, h=1);
340 multmatrix([ [ 1, -ratchettoothslope, 0, 0 ],
345 ratchettoothheight - ratchettoothsmoothr,
352 module FilamentCupCup(){
353 for (my=[0,1]) mirror([0,my,0]) {
354 translate([0, cupwidth/2, 0])
355 cube([cupheight + prongwidth, prongwidth, prongthick]);
359 module FilamentCup() { ////toplevel
363 dy = cupwidth/2 + gapy + overclipcupgap;
364 baselen = dy+cupwidth/2;
366 translate([0, dy, 0])
368 cube([prongwidth, baselen+1, prongthick]);
370 translate([cupstrong_dx, prongwidth, 0]) {
371 cube([prongwidth, baselen-prongwidth, prongthick]);
372 for (y = [0, .33, .67, 1])
373 translate([0, (baselen - prongwidth) * y, 0])
374 cube([-cupstrong_dx + 1, prongwidth, prongthick]);
376 if (cupstrong_dx != 0) {
378 translate([-prongwidth*.55, -prongwidth*2.1, 0])
379 cube([prongwidth*(2.65), prongwidth*4.2, prongthick]);
382 translate([0, -0.2, 0])
383 cube([prongribwidth, baselen, prongthick + prongribheight]);
385 if (prongribheight > 0) {
386 translate([-prongwidth, baselen, 0])
387 cube([cupheight/2, prongwidth + prongribheight, prongribwidth]);
390 midrad = cupwidth/2 + prongwidth/2;
392 propshift = stalklength - overclipdepth - prongthick + propxshift;
393 proptaken = propshift;
394 echo(midrad, propshift, proptaken);
396 translate([propshift, -1, 0]) {
397 // something is wrong with the y calculation
402 for (y = [overclipcupgap, overclipcupgap+overclipcupnextgap]) {
403 translate([cupstrong_dx, y + prongwidth, 0])
404 rotate([0,0, 102 + fdia])
405 FilamentTeeth(fdia=fdia, h=teethh);
407 for (x = [-0.3, -1.3]) {
408 translate([cupheight + overclipcupnextgap*x, baselen + prongwidth, 0])
409 rotate([0,0, 12 + fdia])
410 FilamentTeeth(fdia=fdia, h=teethh);
414 module CupSecuringClipSolid(w,d,h1,h2){
415 rotate([0,-90,0]) translate([0,-h1/2,-w/2]) linear_extrude(height=w) {
416 polygon(points=[[0,0], [d,0], [d,h2], [0,h1]]);
420 module CupSecuringClipSolidSmooth(xrad=0, xdepth=0){
421 hbase = totalheight + prongstalkxwidth - overcliproundr*2;
423 CupSecuringClipSolid(w=totalwidth,
424 d=overclipdepth + xdepth,
425 h1=hbase - overclipsmaller,
426 h2=hbase + overclipbigger);
427 cylinder($fn=20, h=0.01, r=overcliproundr+xrad);
431 module CupSecuringClip(){ ////toplevel
432 wingswidth = wingspoke*2 + overclipthick*2 + overcliproundr*2 + totalwidth;
435 CupSecuringClipSolidSmooth(xrad=overclipthick, xdepth=0);
436 translate([-wingswidth/2, -wingsize/2, 0])
437 cube([wingswidth, wingsize, wingthick]);
438 translate([-wingsize/2, -wingswidth/2, 0])
439 cube([wingsize, wingswidth, wingthick]);
441 translate([0,0,-0.1])
442 CupSecuringClipSolidSmooth(xrad=0, xdepth=0.2);
446 module ArmDoveClipPin(){ ////toplevel
447 DoveClipPin(h=doveclipheight);
450 module TowerDoveClipPin(){ ////toplevel
451 DoveClipPin(h=towercliph/2);
454 module Hub(){ ////toplevel
455 axlerad = hubaxlerad + slop;
456 xmin = axlerad+hublwidth/2;
457 xmax = hubbigrad-hublwidth/2;
458 hole = hubeffrad - hubbigrad - DoveClip_depth() - hublwidth*2;
459 holewidth = DoveClipPairSane_width() - hubstemwidth*2;
460 nondove_allwidth = nondove_armhole_wall*2 + totalwidth;
464 cylinder($fn=60, h=hublthick, r=hubbigrad);
466 cylinder($fn=30, h=hublthick+2, r=(hubbigrad-hublwidth));
468 cylinder(h=hubaxlelen, r=axlerad+hublwidth);
469 for (ang=[0 : 360/num_arms : 359])
473 translate([hubeffrad,0,0])
474 DoveClipPairSane(h=doveclipheight,
475 baseextend = (hubeffrad - DoveClip_depth()
476 - hubbigrad + hublwidth));
477 if (hole>hublwidth && holewidth > 2) {
478 translate([hubbigrad + hublwidth, -holewidth/2, -1])
479 cube([hole, holewidth, hublthick+2]);
487 cube([hubeffrad + nondove_armhole_x
488 + nondove_armhole_hole/2 + nondove_armhole_support,
490 nondove_armhole_wall + totalheight]);
491 translate([hubeffrad - nondove_armhole_slop_x,
493 + nondove_armhole_wall - nondove_armhole_slop,
494 nondove_armhole_wall])
495 cube([nondove_armhole_x + 50,
496 totalwidth + nondove_armhole_slop*2,
498 translate([hubeffrad + nondove_armhole_x, 0, -20])
499 cylinder(r= nondove_armhole_hole/2, h=50, $fn=10);
503 for (ang = [0 : 180/num_arms : 359])
504 rotate([0,0,ang]) rotate([90,0,0]) {
505 translate([0,0,-hublwidth/2])
506 linear_extrude(height=hublwidth)
507 polygon([[xmin,0.05], [xmax,0.05],
508 [xmax,hublthick-0.2], [xmin, hubaxlelen-0.2]]);
511 translate([0,0,-1]) cylinder($fn=60, h=hubaxlelen+2, r=axlerad);
515 module ArmExtender(){ ////toplevel
516 DoveClipExtender(length=exteffrad-hubeffrad,
521 module FsAxlePin(){ ////toplevel
522 AxlePin(hubaxlerad, washerrad*2, axlepinrad, axlepintabrad, slop);
525 module Axle(){ ////toplevel
526 pillarswidth = DoveClipPairSane_width(towerclipcount);
528 rotate([0,0, -( axleaxlefudgebend + atan(slop/hubaxlelen) ) ])
529 translate([-axlehorizoffset, -axlevertheight, 0]) {
530 rotate([0,0,-axletowerfudgebend])
532 DoveClipPairSane(h=towercliph, count=towerclipcount, baseextend=3);
533 translate([0, DoveClip_depth(), 0])
535 ExtenderPillars(axlevertheight - DoveClip_depth(),
536 pillarswidth, towercliph,
537 pillarw=towerpillarw);
540 axleclearlen = hubaxlelen + slop*4 + washerthick*2 + axlepadlen;
541 axlerad = hubaxlerad-slop;
542 bump = axlerad * 0.2;
543 shift = axlerad-bump;
547 translate([0, 0, shift]) {
550 translate([-1, 0, 0])
554 h = 1 + axleclearlen + axlepinrad*2 + 2);
555 mirror([1,0,0]) rotate([0,90,0])
556 cylinder(r = axlerad*1.75, h = 3);
559 translate([axlehorizoffset - pillarswidth/2, 0, 0])
562 r = towercliph - shift,
564 translate([-50, -joinbelowallow, -50])
565 cube([100, joinbelowallow+50, 100]);
569 translate([axleclearlen + axlepinrad/2, 0, -25])
570 cylinder(r = axlepinrad + slop, h=50);
573 translate([-50,-50,0]) cube([100,100,100]);
577 module washer(thick){
578 Washer(hubaxlerad, washerrad, thick, slop);
581 module AxleWasher(){ ////toplevel
582 washer(thick=washerthick);
585 module AxleThinWasher(){ ////toplevel
586 washer(thick=washerthinthick);
589 module AxleVeryThinWasher(){ ////toplevel
590 washer(thick=washerverythinthick);
593 module AxleFrictionWasher(){ ////toplevel
595 cylinder(h=washerthick, r=washerrad);
596 translate([0,0,-1]) cylinder(h=washerthick+2, r=hubaxlerad+slop);
599 frarmw = frictionwasherarmwidth;
600 frarmpawlr = hublwidth;
601 frarmpawlpush = slop*4 + frictionwasherextrapush;
602 for (ang=[0,180]) rotate([0,0,ang]) {
603 translate([washerrad-1, -frarmw/2, 0])
604 cube([frarmr - washerrad + 1, frarmw, washerthick]);
606 translate([frarmr - frarmpawlr, -50, 0])
607 cube([frarmpawlr, 100, 50]);
609 cylinder(h = 50, r = frarmpawlpush, $fn=36);
614 module TowerExtender(){ ////toplevel
615 l = totalheightfromtower - axlevertheight;
616 echo("TowerExtender",l);
617 DoveClipExtender(length = l,
618 ha = towercliph, hb = towercliph,
619 counta = towerclipcount, countb = towerclipcount,
620 pillarw = towerpillarw);
623 module FilamentCupPair(){ ////toplevel
625 translate([cupheight + prongthick*3,
628 rotate([0,0,180]) FilamentCup();
631 //----- storarm -----
634 storarm_hookheight = 5;
636 storarm_axleslop = 4;
639 storarm_base_h = 100;
641 storarm_base_mind = 2;
643 storarm_cope_hubaxle_mk1 = true;
645 storarm_screw_hole = 4;
646 storarm_screw_hole_slop = 0.5;
647 storarm_besides_hole = 4;
649 storarm_under_hole = 5;
650 storarm_screw_hole_head = 8.8;
651 storarm_screw_hole_head_slop = 1.5;
655 storarm_axlerad = hubaxlerad - storarm_axleslop;
656 storarm_mainlen = hubaxlelen*2 + storarm_axleslop
657 + (storarm_cope_hubaxle_mk1 ? 10 : 0);
658 storarm_totlen = storarm_mainlen + storarm_hooklen;
660 storarm_mid_off_y = storarm_axlerad;
662 storarm_base_off_y = storarm_mid_off_y + storarm_base_h/2;
664 module StorageArmDiagPartSide(xmin, xmax){
666 yuse = storarm_thick/2;
669 translate([xmin-1, -storarm_axlerad, storarm_thick/2])
671 cylinder(r=storarm_axlerad, h=xsz+2, $fn=60);
672 translate([xmin, -yuse, 0])
673 cube([xsz, yuse, storarm_thick]);
677 module StorageArmDiagPart(xmin, xmax, shear, adjbot){
679 StorageArmDiagPartSide(xmin,xmax);
681 multmatrix([[1,0,0,0],
685 translate([0, -storarm_axlerad*2 + adjbot, 0])
687 StorageArmDiagPartSide(xmin,xmax);
691 module StorageArmBaseTemplate(){
692 square([storarm_base_w, storarm_base_h]);
695 module StorageArmAtMountingHoles(){
696 bes = storarm_besides_hole + storarm_screw_hole;
699 x1 = storarm_base_w-bes;
700 y1 = storarm_base_h - bes;
707 translate([pos[0] - storarm_base_w,
708 pos[1] - storarm_base_off_y, -storarm_base_d])
713 module StorageArmRight(){ ////toplevel
714 shear = storarm_hookheight / (storarm_mainlen/2);
716 StorageArmDiagPart(-1, storarm_mainlen/2+1, shear, 0);
717 StorageArmDiagPart(storarm_mainlen/2-1, storarm_mainlen+1, shear/2,
718 storarm_hookheight/2);
720 translate([0, storarm_hookheight, 0])
721 StorageArmDiagPart(storarm_mainlen, storarm_totlen,
722 shear/2, -storarm_hookheight/2);
727 translate([-storarm_base_d, -storarm_base_off_y, storarm_base_w])
729 linear_extrude(height=storarm_base_mind)
730 StorageArmBaseTemplate();
731 StorageArmDiagPart(-1, 0, shear, 0);
733 StorageArmAtMountingHoles(){
734 cylinder(r= storarm_screw_hole_head/2,
738 StorageArmAtMountingHoles(){
740 cylinder(r= (storarm_screw_hole + storarm_screw_hole_slop)/2 ,
742 translate([0,0,storarm_under_hole])
743 cylinder(r= (storarm_screw_hole_head + storarm_screw_hole_head_slop)/2,
749 module StorageArmLeft(){ ////toplevel
750 mirror([1,0,0]) StorageArmRight();
753 module StorArmHoleTest(){ ////toplevel
754 sz = storarm_screw_hole_head + storarm_besides_hole*2;
757 translate([-50, -storarm_base_off_y, -1])
758 cube([100, sz, sz+1]);
763 //----- filament guide spacer -----
766 guide_armwidth = 10.2;
767 guide_armcorelen = 25.0;
768 guide_clipcirclethick = 10.0;
770 guidefilclip_outerdia = 22.8;
772 guidespacer_armslop = 0.75;
773 guidespacer_armlenslop = 1.05;
775 guidespacer_prongprotrude = 4;
776 guidespacer_thick = 1.6;
780 guidespacer_armdia = guide_armdia + guidespacer_armslop;
781 guidespacer_armwidth = guide_armwidth + guidespacer_armslop;
782 guidespacer_len = guide_armcorelen - guide_clipcirclethick
783 + guidespacer_armlenslop;
785 guidespacer_wingheight = (guidefilclip_outerdia - guidespacer_armdia)/2;
787 module FilamentGuideArmTemplate(extra=0){
789 circle(r= (guidespacer_armdia/2) + extra);
790 square(center=true, [guidespacer_armwidth+extra*2,
791 guidespacer_armdia + extra*2 + 10]);
795 module FilamentGuideSpacerInnerTemplate(){
796 FilamentGuideArmTemplate();
797 translate([0, -guidespacer_armdia/2])
798 square(center=true, [guidespacer_armwidth - guidespacer_prongprotrude,
799 guidespacer_armdia]);
802 module FilamentGuideSpacer(){ ////toplevel
805 linear_extrude(height= guidespacer_len)
806 FilamentGuideArmTemplate(extra= guidespacer_thick);
807 for (angle=[26, 60]) {
810 rotate([0,0,angle]) {
812 for (t=[[0, guidespacer_wingheight],
813 [guidespacer_len-1, -guidespacer_wingheight]])
814 translate([0,0, t[0] + 0.5])
815 cube([guidespacer_thick, guidespacer_armdia + t[1]*2,
825 linear_extrude(height= guidespacer_len+5)
826 FilamentGuideSpacerInnerTemplate();
831 //----- replacement filament guide arm for TAZ-5 -----
833 guidearm_armslop = 0.25;
834 guidearm_armlenslop = 0.25;
836 guidearm_hookprotr = 3;
837 guidearm_hookprotrflat = 1;
838 guidearm_hookslope = 0.3;
840 guidearm_totallen = 60;
842 guidearm_screwplatesz = 12;
843 guidearm_screwplateth = 4;
844 guidearm_screwplatewd = 15;
845 guidearm_screwhole = 5 + 0.5;
847 guidearm_bendlen = 40;
848 guidearm_bendslot = 4.5;
850 guidearm_stopthick = 4;
851 guidearm_protrslop = 1.0;
855 guidearm_armdia = guide_armdia - guidearm_armslop;
856 guidearm_armwidth = guide_armwidth - guidearm_armslop;
857 guidearm_armcorelen = guide_armcorelen + guidearm_armlenslop;
859 guidearm_base_z0 = -(guidearm_totallen - guidearm_armcorelen);
861 guidearm_realbendlen = min(guidearm_bendlen,
862 guidearm_totallen - guidearm_screwplateth - 0.1);
863 guidearm_slopelen = guidearm_hookprotr/guidearm_hookslope;
865 module FilamentGuideArmStop(h){
867 translate([ts * guidearm_hookprotr, 0,0])
868 cylinder(r=guidearm_armdia/2, h, $fn=80);
872 module FilamentGuideArmShaftPositive(){
873 r = guidearm_armdia/2;
875 translate([0,0, guidearm_base_z0+1])
876 cylinder(r=r, h= guidearm_totallen, $fn=80);
877 translate([0,0, guidearm_armcorelen]){
879 FilamentGuideArmStop(guidearm_hookprotrflat);
880 translate([0,0, guidearm_slopelen])
881 cylinder(r=r, h=guidearm_hookprotrflat, $fn=80);
885 FilamentGuideArmStop(guidearm_stopthick);
888 module FilamentGuideArmBase(){
890 (guidearm_screwplatewd - guidearm_armwidth)/2,
893 translate([0,0, guidearm_screwplateth/2])
895 [guidearm_armdia + guidearm_screwplatesz*2,
896 guidearm_screwplatewd,
897 guidearm_screwplateth]);
899 translate([ts * (guidearm_armdia/2 + guidearm_screwplatesz/2),
902 cylinder(r= guidearm_screwhole/2, h=40, $fn=20);
908 module FilamentGuideArm(){ ///toplevel
911 FilamentGuideArmShaftPositive();
912 translate([-guidearm_bendslot/2,
914 -guidearm_realbendlen + guidearm_armcorelen])
915 cube([guidearm_bendslot,
917 guidearm_realbendlen + 100]);
919 for (zx=[ [ 0, guidearm_bendslot ],
920 [ guidearm_armcorelen + guidearm_slopelen,
921 guidearm_hookprotr*2 + guidearm_protrslop ]
923 translate([-zx[1]/2, -50, zx[0]])
924 cube([zx[1], 100, 1]);
931 guidearm_totallen*3]);
933 FilamentGuideArmBase();
936 module FilamentGuideArmPrint(){ ////toplevel
941 module Demo(){ ////toplevel
942 translate([-real_exteffrad,-20,0]) Hub();
944 translate([ratchettooth*2, 30, 0]) FilamentCup();
956 //AxleFrictionWasher();
959 //FilamentGuideSpacer();
960 //FilamentGuideArm();
961 //FilamentGuideArmPrint();