To find a well-designed timing pulley, go to any web site that sells pulleys. SPD/SI is one of the best. Then find the pulley or gear you would like and there will be a link to download a CAD file for that exact gear/pulley. McMaster Carr also has CAD files for all their stuff. So dose Boston Gear.
Here is an example page: http://shop.sdp-si.com/catalog/?cid=p346&filter=a0%3A2%3A3%20mm%20(GT2)%3Ba15%3A2%3A2%20Flanges%2FWith%20Hub%3ANo%20Flange%2FWith%20Hub&sort=undefined&view=table Notice the "CAD" link. From there you can drill down to the actual file. This CAD model will be of the actual part that you can buy. Download the file then import the file. Almost certainly you will need to modify the bore to fit your motor. I like to cut a 20mm hole and fit them over a 20mm steel bushing. But you can made a 9mm "D" or keyway or what ever the motor has. Then save to STL and put itthough your slicer to make g-code. It is a long workflow The eniter SPD/SI inventory is available to download. Although as said, printed belts don't work well. On Wed, May 27, 2020 at 11:11 PM Thaddeus Waldner <thadw...@gmail.com> wrote: > Here’s one that I have used successfully: > > https://www.thingiverse.com/thing:16627 > > It is a parametric pulley designed in OpenScad. I believe the Thingiverse > website allows you to configure openscad designs from the website, then > download the.stl. But you can also download the Openscad file. > > .stl is what your slicer (CAM for 3d printers) wants. > > For a reliable motor-mounted pulley, I ended up doing something similar to > what Chris Albertson describes. Mine was a plastic pulley with a hub that > has two pockets for clamp nuts. The OD of this hub fits snugly into a metal > ring with a pair of radial holes. The set screws run through these holes, > thread into the nuts, then bite into the motor shaft. > > > Sent from my iPhone > > > On May 28, 2020, at 12:30 AM, Gene Heskett <ghesk...@shentel.net> wrote: > > > > On Wednesday 27 May 2020 23:23:39 Chris Albertson wrote: > > > >> On Wed, May 27, 2020 at 5:38 PM Gene Heskett <ghesk...@shentel.net> > > wrote: > >>>> On Wednesday 27 May 2020 20:10:44 Chris Albertson wrote: > >>>>> By total coincidence, I just made both. I needed 30T, 40T, and > >>>>> 60T pulleys. I tried printing them and they fail after a while. > >>>>> The plastic simply will not hold the set screw then they slip on > >>>>> the shaft. The big thing is if the motor gets warm it heats the > >>>>> plastic. The solution has to print the pulley as the thin ring. My > >>>>> 30T puley has a 20mm hole. Then use the lathe to make a 20mm OD > >>>>> bushing with two set screws 90 degrees apart. I make this with > >>>>> steel. The pulley-ring is press fit to the steel bushing using 5 > >>>>> minute epoxy. OK, you ask "How strong can plastic teeth be?" the > >>>>> answer seems to be "stronger than the rubber teeth on the belt." > >>>>> The part of the pulley that needs to be strong is the hub and that > >>>>> is now steel. Making a center bored cylindrical bushing is a very > >>>>> easy job. I made a few and this method turned out the simplest > >>>>> and best. Make the ring really thin so as to make the bushing as > >>>>> big as you can. > >>>>> > >>>>> I just returned from riding my bike for a few hours and notice my > >>>>> NEMA23 mount plate is 80% finished. I'm still testing if these > >>>>> can be made with plastic. I think so if about 6mm thick I'll > >>>>> know soon. I have a test setup to check for flex in the plate. > >>>>> > >>>>> I'm working on a plan or "kit" to convert an HF mill to CNC using > >>>>> way-cheap plastic parts (< $20 material cost) and minimal machine > >>>>> work. I'll publish the design files after it works. I've had > >>>>> to redesign/remake some parts 3 or 4 times but it comes out more > >>>>> simple each iteration > >>> > >>> I'd like to see if I could convert this 6040 into a printer, > >>> precisely so I could do something along those lines but in looking > >>> around for a printhead, it seems the drive is much lighter so > >>> smaller motors can move it faster, and never the twain shall meet. > >>> Trading a 3kg 24k spindle motor out for a printhead the might weigh > >>> 5oz is quite a change. I could buy another printer, but where I'd > >>> have to set it up has no AC. And good results seem to be quite temp > >>> dependent. So I get that stuff from fleabay, and wait, and wait, > >>> and wait. Thats frustrating too. > >>> > >>> So who makes the best printer for stuff like this, at an affordable > >>> price? > >> > >> Most people are recommending the "Ender" brand printer for your > >> use-case. This is an open-source design that uses industry-standard > >> parts so future maintenance should not be to much of an issue. If > >> you print with PLA plastic, it is bomb-proof simple and temperature, > >> and so on does not matter. My printer is an Anet "A6" and I paid > >> about $185 for it. It looks cheap because the frame is made from > >> laser-cut acrylic plastic. But acrylic is strong and rigid and works > >> well. The Ender has a metal frame and is slighter better. > >> > >> But be-warned, a printer is like a CNC mill in that that parts it > >> makes have to be carefully designed but unlike a mill, there is no > >> hope of ever writing printer G-code by hand, it is far to complex. > >> Plastic can be strong if you puff up the thickness and make all the > >> sides round. You tend to print parts with solid shell and a > >> foam-like interior. > >> > >> amazon.com/Comgrow-Creality-Ender-Aluminum > >> <https://www.amazon.com/Comgrow-Creality-Ender-Aluminum-220x220x250mm/ > >> dp/B07BR3F9N6> > >> > >> This is the one I have. The price has gone up because those selling > >> cheap when broke. > >> amazon.com/Precision-Desktop-Printer > >> <https://www.amazon.com/Precision-Desktop-Printer-Assembly-Cleaning/dp > >> /B01N5XV5NU/ref=sr_1_2?dchild=1&keywords=anet+a6+printer&qid=1590632711 > >> &s=industrial&sr=1-2> > >> > > I wound up buying the higher priced version to get the better bed, some > > extra nozzles and a couple rolls of PLA. Obviously I need driver sw, so > > will need some tutoring on that. For instance, and using my experience > > at writing gcode, is there a timing pulley pattern for 2mm timing belts > > that autosizes the product according to the requested number teeth, and > > allows an adjustable center hole for attaching it to a metal hub? plus > > flanges of course. I've made several taper lock hubs that have worked > > well including a repair of the lower 2 belt pulley in the E400 under > > drive of my Sheldon 11x54 lathe. > > > >> The plastic costs about $22 per Kg. I use "hatchbox" band but I'm > >> sure others work too. Just do start with PLA and likely you stay with > >> it. amazon.com/HATCHBOX > >> <https://www.amazon.com/HATCHBOX-3D-Filament-Dimensional-Accuracy/dp/B > >> 00J0GPC80/ref=pd_sim_328_5/140-9661733-2175833?_encoding=UTF8&pd_rd_i=B > >> 00J0GPC80&pd_rd_r=c9f25db5-27c5-4c4e-b5fb-62dd9b9c3b12&pd_rd_w=5vegT&pd > >> _rd_wg=AfyjI&pf_rd_p=6f740e39-0c25-4380-8008-7a4156dab959&pf_rd_r=W6FB1 > >> TGW7SX8KDWJ04KR&psc=1&refRID=W6FB1TGW7SX8KDWJ04KR> 1 Kg is a lot. I > >> printed a mod 2, 120 tooth gear that is about 5" diameter and 1" face > >> width. It is a really big gear. It used about 160g of plastic. > >> > > I couldn't find hatchbox brand at that link so I paid a couple bucks > > more, all PLA. It should all be here next week. Hopefully I can make > > all the timing pulleys needed to run a BS-1 clone. Still have to buy > > belts though. S/B 4 pulleys all together as I'll have to make an on > > tilt axis center intermediate shaft in order to use the tilt feature w/o > > needing a grocery sack of belts. That should also get me geared down to > > where that 3NM motor can run it under cutting forces. And it might do > > the motor mounts, grabbing both ends of the motor. > > > >>>> On Wed, May 27, 2020 at 2:06 PM Gene Heskett > >>>> <ghesk...@shentel.net> > >>> > >>> wrote: > >>>>> On Wednesday 27 May 2020 00:51:57 Gene Heskett wrote: > >>>>>> On Tuesday 26 May 2020 19:45:10 Chris Albertson wrote: > >>>>>>> On Tue, May 26, 2020 at 3:01 PM Gene Heskett > >>>>>>> <ghesk...@shentel.net> > >>>>>> > >>>>>> wrote: > >>>>>>>> Those closed loop motors and controllers have arrived, and > >>>>>>>> I puzzled by a total lack of docs other than the u-step > >>>>>>>> ratios printed on the cover. Thats covered by dip sw1-4, > >>>>>>>> but its a 6 pos switch, and 5 & 6 are in Chinese > >>>>>>>> pictograms. > >>>>>>> > >>>>>>> I'm following this because, as said, I plan on doing the > >>>>>>> same. However I always read the docs BEFORE buying, no docs, > >>>>>>> I don't buy. > >>>>>>> > >>>>>>> Post a photo of the Chinese characaters, I have someone > >>>>>>> here fluent in Chinese. Also you can try Chinese OCR and > >>>>>>> then apply Google Translate. > >>>>>>> http://www.i2ocr.com/free-online-chinese-traditional-ocr > >>>>>> > >>>>>> I found out what they do, one is a direction reverser, the > >>>>>> other makes it open loop. Suits me anyway. I'll get one of > >>>>>> those supplies and one of these on the same table and play > >>>>>> with a function generator tomorrow, claims to be good for 200 > >>>>>> khz steps, and has divisors out the yang, so it ought to be a > >>>>>> dropin except for the mounts and shaft sizes so I'll need to > >>>>>> find some timing pulleys and belts. And a nema 23 mount since > >>>>>> that 1600 oz/in on the Z now is a nema 34 mount. An see if > >>>>>> there is room enough behind the apron for one of them, its > >>>>>> 124mm long in which case I'll order another for the indexer > >>>>>> and put both of these on the Sheldon. > >>>>> > >>>>> Shot down there, its around 4mm too long to clear the bed. > >>>>> > >>>>> As it runs, the 800 or 1000 divisor seems to be the smoothest, > >>>>> either one getting to 2500+ revs, 800 stalling, 1000 dieing > >>>>> because of slow opto's at about 220 kilohertz. Either way plenty > >>>>> of turn the house around torque, so I'm suitably impressed. Now > >>>>> I need a 10mm belt pulley with 30 teeth and a motor mount for a > >>>>> nema 23. The trick is finding both on this side of the pond... > >>>>> > >>>>> Thanks All > >>>>> > >>>>>> That 8 lead nema 24 on the x is slow, stalls at > >>>>>> about 30 ipm. even when set as 4 wire parallel and all the > >>>>>> amps a 2m542 can do. Even then it runs cooler than steppers > >>>>>> usually do. The x belt tensioner is drilled for a 23 and then > >>>>>> the holes were moved enough for the 24. > >>>>>> > >>>>>>> My guess about the cable length mismatch is that the seller > >>>>>>> you bought this from gathers parts and packages them and > >>>>>>> this motor was made for a use case that did not include this > >>>>>>> controller. > >>>>>> > >>>>>> The motor and encoder look to be an integrated unit. So I'll > >>>>>> have to splice it, or pull the cover and see if its easily > >>>>>> replaceable with a smallish 18 or 20 gauge line cable. Lots > >>>>>> of layup stuffing on this one to get to a matching cable > >>>>>> jacket size, the wire gauge itself isn't impressive at all. At > >>>>>> its peak of 4 amps a coil, that cable WILL heat. Not badly, > >>>>>> but detectable. > >>>>>> > >>>>>>> When googling for the instruction, look for related > >>>>>>> controllers as I'd bet the firmware was written to run on > >>>>>>> many different sizes of controllers, not just the one you > >>>>>>> have. Many of these are Leadshine clones so look at > >>>>>>> Leadshine web site. > >>>>>> > >>>>>> Thanks Chris, stay well. > >>>>>> > >>>>>> Cheers, Gene Heskett > >>>>> > >>>>> Cheers, Gene Heskett > >>>>> -- > >>>>> "There are four boxes to be used in defense of liberty: > >>>>> soap, ballot, jury, and ammo. Please use in that order." > >>>>> -Ed Howdershelt (Author) > >>>>> If we desire respect for the law, we must first make the law > >>>>> respectable. - Louis D. Brandeis > >>>>> Genes Web page <http://geneslinuxbox.net:6309/gene> > >>>>> > >>>>> > >>>>> _______________________________________________ > >>>>> Emc-users mailing list > >>>>> Emc-users@lists.sourceforge.net > >>>>> https://lists.sourceforge.net/lists/listinfo/emc-users > >>> > >>> Cheers, Gene Heskett > >>> -- > >>> "There are four boxes to be used in defense of liberty: > >>> soap, ballot, jury, and ammo. Please use in that order." > >>> -Ed Howdershelt (Author) > >>> If we desire respect for the law, we must first make the law > >>> respectable. - Louis D. Brandeis > >>> Genes Web page <http://geneslinuxbox.net:6309/gene> > >>> > >>> > >>> _______________________________________________ > >>> Emc-users mailing list > >>> Emc-users@lists.sourceforge.net > >>> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > > > Cheers, Gene Heskett > > -- > > "There are four boxes to be used in defense of liberty: > > soap, ballot, jury, and ammo. Please use in that order." > > -Ed Howdershelt (Author) > > If we desire respect for the law, we must first make the law respectable. > > - Louis D. Brandeis > > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
