<![CDATA[SoliForum - 3D Printing Community — Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/topic/8628/yaxis-pulleys-run-on-threads/ Mon, 22 Dec 2014 23:55:18 +0000 PunBB <![CDATA[Re: Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/post/76157/#p76157 Here you go~ http://www.thingiverse.com/thing:79737

Print them 100% infill with 2 perimeters. They aren't that big.

]]> Mon, 22 Dec 2014 23:55:18 +0000 https://www.soliforum.com/post/76157/#p76157 <![CDATA[Re: Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/post/76149/#p76149 jagowilson wrote:

Somebody posted about alternative y brackets here. Some neat designs that allow the pulleys to run on bearings:
http://www.soliforum.com/topic/8661/new … -brackets/

I had a look at those and they look like a good alternative. However is there a source of the original printed parts of the model 3 available anywhere in STL format? I would like to print at least one replacement part for each part I have in the printer in case something breaks.

]]> Mon, 22 Dec 2014 22:53:52 +0000 https://www.soliforum.com/post/76149/#p76149 <![CDATA[Re: Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/post/74839/#p74839 Somebody posted about alternative y brackets here. Some neat designs that allow the pulleys to run on bearings:
http://www.soliforum.com/topic/8661/new … -brackets/

]]> Thu, 11 Dec 2014 15:31:57 +0000 https://www.soliforum.com/post/74839/#p74839 <![CDATA[Re: Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/post/74820/#p74820 has anyone actually replaced the threaded bolt with a smooth rod or other smooth part, and had an issues I should be a ware of by doing that?

]]> Thu, 11 Dec 2014 08:56:17 +0000 https://www.soliforum.com/post/74820/#p74820 <![CDATA[Re: Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/post/74271/#p74271 It's funny you mention this, because I was having similar thoughts about running a smooth rod through the front. This will really only be feasible if the holes up front are 13mm like the ones in the back, but not near my machine to check. If they are, you could put a smooth rod up front and put the pulleys on it, and put the rod on flanged bearings. Two advantages I see are it may strengthen the frame some, and stiffen the Y axis some more, which are both good things. A couple disadvantages I can think of off the top of my head are its simply more complicated (adds another step to belt alignment), and could end up being a potential source of binding if there are things I'm not foreseeing. I don't think it would need pillow bearings, because the belts shouldn't be tight enough to bend the rod toward the rear. Just some thoughts. I'd be interested if you tried it out and posted your results.

From your other threads I see that you are more than happy to modify your machine. The drive system needs a LOT of work out of the box-look into the Lawsy carriage, and consider strengthening the rear rod with a pillow bearing and flanged bearings on the sides of it. I'm still working through this on my machine (finals week), but I've loved every single enhancement I've made to the drive system. My thinking is your prints are only as good as your drive system, and while the stock drive system works, it's simply adequate. Nothing stellar. If you cherish dimensional accuracy like I do, there are a lot of things you can do to really tighten up your machine, make it run smoother and ultimately print more accurately.

The stock idler brackets will work, but you should print your own once you're up and running because Solidoodle printed the parts for your printer at low infill, likely somewhere around 30-40%. (At least tbey did for my SD4). Search Thingiverse.

]]> Sun, 07 Dec 2014 17:38:39 +0000 https://www.soliforum.com/post/74271/#p74271 <![CDATA[Re: Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/post/74261/#p74261 It is indeed an M5. You want a partial thread over a full thread or else the pulley will catch the threads and may cause an occasional shift.
The pulley brackets are anchored to the frame by an M3 which sits behind the pulley when installed.
If you cannot find partial threaded M5 screws around town, you can pick some up through mcmaster.com

]]> Sun, 07 Dec 2014 16:34:46 +0000 https://www.soliforum.com/post/74261/#p74261 <![CDATA[Re: Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/post/74259/#p74259 I had mine apart a few times to grease it. I found that (mine at least) is a partial threaded 5mm bolt. The pulley has a bushing and runs on the smooth shank of the bolt.

]]> Sun, 07 Dec 2014 16:05:41 +0000 https://www.soliforum.com/post/74259/#p74259 <![CDATA[Re: Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/post/74248/#p74248 Yes, it is running directly on the thread of the bolt. It has held up for me but it may be worth printing a set of replacement carriages for your whole printer as the solidoodle stock parts are quite low-quality prints. There are a set of refined solidoodle carriages designed by Lawsy that can be found on thingiverse that are great even if they are just for emergencies
-Matt

]]> Sun, 07 Dec 2014 14:33:33 +0000 https://www.soliforum.com/post/74248/#p74248 <![CDATA[Y-Axis Pulleys Run on Threads?]]> https://www.soliforum.com/post/74228/#p74228 Solidoodle Model 3

The front belt pulley seems to be mounted by a threaded bolt and all that is mounted in a printed U block. Does anyone know if these pulleys have bearings in them? or are they just riding on the bolt's threads? And has your experience shown that these printed blocks can stand up to the force of the tensioned belt after the printer runs for a long time.

In other words, should I replace the block with a better part and/or modify the assembly so the pulley runs on a smooth rod and not a threaded bolt?

]]> Sun, 07 Dec 2014 06:48:14 +0000 https://www.soliforum.com/post/74228/#p74228