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ultiarjan

How to fix belt alignment

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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).Maint1-dust.thumb.jpg.d84e4ca9e059454c7bb9fb82b01f8d39.jpg

When looking at the small motor belt on the top axis pulley it's grinding to the side.Maint2_topPully.thumb.jpg.a9a9f169214a639902f2921e896c1b76.jpg

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.Maint3-BeltOnMotor.thumb.jpg.73dd1054bc24641869e8ab61e0e98dad.jpg

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=

Maint1-dust.thumb.jpg.d84e4ca9e059454c7bb9fb82b01f8d39.jpg

Maint2_topPully.thumb.jpg.a9a9f169214a639902f2921e896c1b76.jpg

Maint3-BeltOnMotor.thumb.jpg.73dd1054bc24641869e8ab61e0e98dad.jpg

Edited by Guest

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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.

UM2_Axis_spacer.thumb.jpg.7a80314ababb0fe58231a155985f3a95.jpg

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...

UM2_Axis_spacer.thumb.jpg.7a80314ababb0fe58231a155985f3a95.jpg

Edited by Guest
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