# Belt Tensioner issue

**URL:** <https://forum.sovol3d.com/t/belt-tensioner-issue/8767>\
**Category:** Sovol SV08 MAX\
**Tags:** advice\
**Created:** [September 21, 2025, 11:50am UTC](https://forum.sovol3d.com/t/belt-tensioner-issue/8767 "2025-09-21T11:50:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![KoizumiChineko](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.sovol3d.com/koizumichineko/32/4501_2.png) [@KoizumiChineko](https://forum.sovol3d.com/u/KoizumiChineko)\
**Post date:** [September 21, 2025, 11:50am UTC](https://forum.sovol3d.com/t/belt-tensioner-issue/8767/1 "2025-09-21T11:50:00Z")

</div>

Following this process [Axis belt adjustment tutorial](https://wiki.sovol3d.com/en/SV08-AB-axis-belt-replacement-and-adjustment-tutorial) (I had some Z artifacts) I found out that my gantry belt parallelism is off by a lot. I tried adjust it but with little to no change.

So I tried to loosen belt entirely, and even when belt lie loose, belt tensioner with both side screws removed does not move, next I tried to move tensioner a little with finger and that I heard pop sound and saw that mechanism moved backwards

I think that this hole is to tight and lock tensioner in place

 ![image](https://canada1.discourse-cdn.com/flex030/uploads/sovolforum/original/2X/d/d1648d190c9ae0df63c79add616180086bb0dc27.jpeg)

I did contact SOVOL via mail regarding parallelism, but I advise you to check if your tensioners even move on AB axis belt.