Belt Damage
I've found that the back right lower idler appears to be cutting up the belt: https://youtu.be/gRZUi68yyrU
Where should I begin on troubleshooting?
22 Replies
seeing that gap above the belt on the motor pulley tells me you need to move that motor pulley DOWN so the belt will ride lower on the pulley eating the belt
I dropped it down lower, any good way to tell if it's in the right position
when you move the belt you should see the 'bad pulley' belt position change.
it should be more centered top to bottom
It looks a bit more centered, but seems to have more variance than the other idlers. Low at the front, high at the back.
move your gantry all the way up front (x0) can possibly re-shim the pulley to center it ..repeat at the back as needed might be the gantry carriers, might be the front idler...might be where you were just messing with
That would involve moving one of the existing shims below or above the bearing?
correct
Alright, the belt sometimes touches the edges of the other bearings, but maybe this one was just extra out of alignment. I'll see if it runs better with the adjustment to the motor gear helped, then disassemble the motor assembly to make sure the path is clear, then shim it if the path is fine.
it can also be the result of some slight tilt to the pivot bolt making the belt want to walk towards one end or the other of the pulley
That's a good point, but I would expect it to just stay up or stay down instead of move up and down. It could also be the idler hidden in the assembly.
as you move the gantry fore/aft... just watch for which pulley the belt walks across and how
including the motor pulley which will tell you if you have to mess withthe guide pulleys
Thank you for your help. I'm going to hit the hay and try some of these ideas in the morning.
I just watched your video, on youtube , for the larger format.... even in your video...watch the TOP belt across the back as you move the gantry. You can see the belt rise and fall as you move the gantry. TILT of a pivot is the only thing that would make it want to walk up/dn as you reverse directions. (and or round trip alignment across the entire path is not on the same plane.)
like-gold•2y ago
@monsoono Did you figure it out? I have the exactly same issue with mine
It seems to be doing well. I loosened off the pulley and moved it down a bit. I went until I saw a reduction in the vertical travel of the belt. I also loosened the belt as much as I could while not introducing input shaper results.
like-gold•2y ago
thanks !
Good luck :0
absent-sapphire•2y ago
I had this same issue and just had to move the drive hear on the motor shaft down. Seams like I have seen this problem pop up for many others too. I wonder if a warning in the assembly manual is appropriate.
Problem with the current design (3.1) is you can't see the entire pulley in the xymotor print's window. So it's a matter of trial and error to get it right. I switched to the fmmm (full metal motor mod) and also did full metal at the idlers and my belts are perfect now. I chewed up 2 sets of belts with the printed corners. Ratrig needs to revise the print design so the entire pulley can be seen in the windows.
im having this exact same issue in the exact same spot. did you ever resolve it?
Yeah, I'd have to test it with a fresh belt to be sure of course, but I haven't seen any more belt damage or rubber flakes in the following 100 hours of operation.
Ok thanks. I'm having an issue I posted below this one where my belt keeps jumping the idler on the bottom right motor. almost feels like it needs an additional spacer but then it will send the problem down the rest of my system
I cant figure out why its different or whats happening or if its just a bad belt