How to fix belt alignment

[ultiarjan 1,223]

In my quest to get back the original good surface quality I used to have I decided to do some proper maintenance on my UM2.

First sign of something that needs fixing is belt dust below the X motor (right back stepper).

When looking at the small motor belt on the top axis pulley it's grinding to the side.

When looking at the same belt on the motor side (yeah that's a difficult place to take a picture) it's also pushed to one side.

So how to fix it?

option1: put a spacer ring between the pulley and the backpannel (bearing) on the top axis

option2: loosen the pulley on the motor and mount it a mm or so further away from the motor.

Any suggestions ?

Just to mention, the pulleys are all tight and there's no play in the axis

here's surface quality topic that started all this...

https://ultimaker.com/en/community/view/6375-top-layers-not-touching-um2?page=1&sort=

Edited November 22, 2015 by Guest

[Dim3nsioneer 557]

First option works quite well as I can say from my own experience. I replaced the standard spacers by self-printed ones where the distance was not ok.

Maybe you have to add a thin spacer on the axis with two pulleys. Then the right pulley could be out of line. But I guess you could mount it the other way round...

Edited November 22, 2015 by Guest