LitePlacer.com forums

I think it is about fitness of tooth shapes on the belt and on the pulley. So maybe you should try various pulleys also. Thanks for the suggestion, I did try another make of pulley recently but it didn't improve it. Theoretically at the correct belt tension, the effect of the tooth backlash should ...

Very interesting. Maybe your v-wheels are now tensioned insufficiently? Could you please measure offset error vs coordinates like i did? I should have been more clear, I've been having another issue: https://liteplacer.com/phpBB/viewtopic.php?f=4&t=6019 It was a long shot, but figured there was...

Noting fancy in there, just that the loosen / retighten can be done only after the long rails are in place. Please see https://www.liteplacer.com/the-machine/assembly-instructions/frame-step-16-front-posts/ , towards the end of the page. Ah, I see, you're talking about the Y axis, I think this issu...

Tried the instructions here to see if it addressed by positioning issue (it didn’t), but the X axis now moves a lot more freely. However I couldn’t find JuKu’s additions in the build instruction (to see if I followed the official instructions correctly), I’ve probably missed them, but couldn’t find ...

Revisited this again. I’m just concentrating on the X axis (although Y has a similar problem, X is easier to isolate as it’s one belt). Outruled via testing the following, Cable Carrier, flexure of the motor / idler plates and belt tension, belt vertical positioning on the idlers/gear. The one thing...

JuKu wrote:While at it, check the sturdiness of the frame also, in case something has gotten loose. If you need or want spare idlers, please let me know.

Frame checked, everything is okay

DonaldE wrote:I think it's a great design, have you used it?

yes, it works great, just make sure you get an appropriately sized PSU

Tried a GT2 Steel belt, didn’t solve it, infact error increased, so we can probably rule out the belt. Checking the idlers again, noticed different behaviour on the idlers since reassembly, before one went up whilst one went down with a change in direction of travel, but on reassembly (with differen...

To verify it was 100% mechanical and wasn't the TinyG or Software..... Built a teensy app to monitor the steps sent in the form of an accumulator, result was the steps are correct, there's no imbalance. To outrule the driver, connected the X axis digital output to a gecko stepper driver (G251X). Mad...

So I tried a different X axis setup with some 3D printed parts. 2 bearings and stepper located on the head, and one piece of belt the length of the x axis, with it fixed at one end and adjustable tensioner at the other end. So belt is fixed, and stepper works it's way along the belt. Surprisingly, i...