<![CDATA[SoliForum - 3D Printing Community — Adjustable Y Idlers - Reprise]]> 2016-11-03T10:30:38Z PunBB https://www.soliforum.com/topic/9550/adjustable-y-idlers-reprise/ <![CDATA[Re: Adjustable Y Idlers - Reprise]]> I've just installed these corner blocks and they're absolutely amazing. The frame is much more rigid. I'm thinking of perhaps putting similar blocks in the remaining corners. What do you think? I had to shorten my belts about 1/2" I did not use the tightening method designed into your part since I don't have metric hardware. I like the idea of being able to tighten from the front.

Does anyone else have really wide bolts that the E3D extruder setup wants to bump into? There's no reason for them to be this long I think I'll cut off 1" so that I don't have clearance issues at the front (this is unrelated to this mod and was happening before too).

Also note to move the light strips before drilling wink

http://soliforum.com/i/?6MZxliG.jpg

http://soliforum.com/i/?DB2YMoG.jpg

Anyways, a million thanks! I feel like my SD2 is progressing towards being reliable.

pirvan wrote:

A short while ago, mdrVB6 was looking for some adjustable "Y" idler block replacement, and I came up with a set which he printed and apparently is quite happy with.

http://www.soliforum.com/misc.php?action=pun_attachment&amp;item=7360

meanwhile someone posted a simple fix for a problem I never knew was there, but it's quite real: flex in the metal frame, where the blocks are mounted.  The tension in the belt is actually tweaking the frame

http://www.soliforum.com/post/78701/#p78701

The fix is simple enough, but I thought I'd give it a try with a different way to solve the problem that also combines the adjustable idler in the design

This new block replaces the stock idler block, and also requires 3 holes in the frame.  2 holes are to be drille, the other one, requires the removal of the pressed-in PEM nut.  The total adjustment offered device is 6mm. 

What makes this different than the original design, is that it fits in the corner of the frame, and provides the stiffness needed to prevent the aforementioned frame tweaking.  The slots on the top and side are there to accommodate the pop rivets the frame is put together with.

]]> https://www.soliforum.com/user/15212/ 2016-11-03T10:30:38Z https://www.soliforum.com/post/127913/#p127913 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> mdrVB6 wrote:

Sorry, just seeing this now.  I modified these idlers to fit the stock holes on an SD4.  I'll post it from home later on but if I forget, shoot me a PM to remind me.  They work great.

Looking forward to see your tweak for the SD4 mount. I was going to do that plus modifying for smooth idlers but will wait to see your files. Thanks!

]]> https://www.soliforum.com/user/13693/ 2016-03-01T23:29:42Z https://www.soliforum.com/post/118444/#p118444 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> redbarret wrote:

And it is not an issue at  lower tensions, that's why people upgrading to direct drive and leaving the other MXL pulleys/belts don't seem to have backlash anymore, I think.
I'll know for sure after my GT2 belt/pulleys arrive and I test it.

I am also installing GT2's with 16T pulleys. MXL's are not good for linear motion and produce backlash. This can be partially compensated by software (hysteresis), as Ultimakers do, but it not the best starting point. Good reading here (jump to 4.4 in the doc):
http://www.sdp-si.com/D265/PDF/D265T008.pdf
To adjust the steps for GT2 depending on pulley (16T or 20T), stepper angle, and driver micro stepping here is the calculator:
http://prusaprinters.org/calculator/
SD's use 1.8 degree motors, 1/16 micro stepping so you only need to worry about the number of teeth on the pulley -- 16T or 20T, really does not matter much which one you buy, but the idler should have the same number. Also, since I am replacing the belts and pulleys I decided it would be better to get real idlers (http://www.amazon.com/3D-CAM-Aluminum-B … =gt2+idler)  instead of converting the pulleys to idlers by adding the bearings.

]]> https://www.soliforum.com/user/13693/ 2016-03-01T23:25:06Z https://www.soliforum.com/post/118443/#p118443 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> Sorry, just seeing this now.  I modified these idlers to fit the stock holes on an SD4.  I'll post it from home later on but if I forget, shoot me a PM to remind me.  They work great.

]]> https://www.soliforum.com/user/4377/ 2016-03-01T18:46:46Z https://www.soliforum.com/post/118426/#p118426 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> yeah, took me a little work to get there, but I am quite happy with #1... now to get #2 up to speed... never ending struggle with 4 printers to tinker with, LOL

]]> https://www.soliforum.com/user/10399/ 2016-02-27T19:12:59Z https://www.soliforum.com/post/118154/#p118154 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> heartless, very cool. Will definitely try your idler. I have also checked your prints as per the Moderator's suggestions and they are definitely high quality so feeling a lot better now smile

]]> https://www.soliforum.com/user/13693/ 2016-02-27T18:34:38Z https://www.soliforum.com/post/118144/#p118144 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> rsantos - Welcome to the club. smile

we bought our 1st SD4 used, and had to do a lot of calibration to get it to print decently. Then the USB failed on the board and we had to make some major changes to the machine... over the last year it has gone through some serious mods but it is my favorite these days out of 4...

Adjusting the collars against the frame of the SD4 is almost a must.

I use a Y idler bracket of my own design - one that allowed me to put bearings in for the 5mm screw to ride on (requires a set screw in the pulley) I also use the Lawsy carriages - belt tensioning is done from those, so no need of an adjustable Y idler. (file is attached if you would like to give them a try - it is modeled around a common RC bearing 5x11x5 (S685 series) of which I had plenty on hand) you can print 2 as is, or print one mirrored if you like - doesn't matter - it should work either way.

]]> https://www.soliforum.com/user/10399/ 2016-02-27T17:32:01Z https://www.soliforum.com/post/118134/#p118134 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> Nothing in your first post sounded pessimistic, more like realistic.  You'll fit in nicely here, lots of great folks here.  Just let us know how we can help.

]]> https://www.soliforum.com/user/2291/ 2016-02-27T16:00:12Z https://www.soliforum.com/post/118118/#p118118 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> Sorry I didn't want to sound pessimistic. I know I can reach these results as I built 2 printers (Graber and MPCNC) from scratch and this one is no different, except for the realization on how good the other 2 are compared to a finished commercial product. Obviously it took me a lot of time (=money) to get them there.

]]> https://www.soliforum.com/user/13693/ 2016-02-27T14:48:16Z https://www.soliforum.com/post/118113/#p118113 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> There is no reason you can't achieve excellent results with the proper modifications on your SD4.
Reach out to users heartless and jagowilson, both run SD4's and their prints are fantastic.

]]> https://www.soliforum.com/user/2291/ 2016-02-27T14:39:17Z https://www.soliforum.com/post/118112/#p118112 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> A bit off topic, but sometimes I get sad seeing the quality of prints for the SD upgrades out there but the pics here gives me hope smile (They were printed on a SD right?  smile ).  I bought a "broken" SD4 that was not broken at all, just incredibly out of calibration and I am about to print a full plate of upgrades (including this one)... but with my Graber Prusa I3 for now...

]]> https://www.soliforum.com/user/13693/ 2016-02-27T14:35:09Z https://www.soliforum.com/post/118110/#p118110 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> No worries, I get it and was more asking if someone had a modified version. Thank's for the idea, I may try to modify it to fit my printer if no one has done it yet.

]]> https://www.soliforum.com/user/9029/ 2015-10-07T12:10:10Z https://www.soliforum.com/post/107127/#p107127 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> Sorry, but I don't have an SD4 so I can't help you there. 

They were designed for my SD3, so they should fit most, if not all SD3.

]]> https://www.soliforum.com/user/1357/ 2015-10-06T19:22:14Z https://www.soliforum.com/post/107098/#p107098 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> I was exited to find these idler for my SD4, since the original idlers are horrible and the frame seems a bit flimsy. But, these don't seem to fit SD4? Just printed the left one yesterday, but it seems SD4 would need a taller idler to reach the top of the frame, and there's also the door hinges that are screwed to the frame that'd need cut-outs on the the left hand idler.

So I'm wondering, does anybody have a version of these idlers that's modified to fit SD4?

Thanks in advance,

veehoo

]]> https://www.soliforum.com/user/9029/ 2015-10-06T09:01:36Z https://www.soliforum.com/post/107069/#p107069 <![CDATA[Re: Adjustable Y Idlers - Reprise]]> Gotcha.  I didn't open it since I was on my work computer w/o repetier.

]]> https://www.soliforum.com/user/4377/ 2015-01-30T12:52:30Z https://www.soliforum.com/post/82356/#p82356