# Z Height upgrade

**URL:** <https://forum.avidcnc.com/t/z-height-upgrade/1509>\
**Category:** Build Logs\
**Created:** [December 31, 2022, 3:34am UTC](https://forum.avidcnc.com/t/z-height-upgrade/1509 "2022-12-31T03:34:42Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Derekfrommalden](https://avatars.discourse-cdn.com/v4/letter/d/96bed5/32.png) [@Derekfrommalden](https://forum.avidcnc.com/u/Derekfrommalden)\
**Post date:** [December 31, 2022, 3:34am UTC](https://forum.avidcnc.com/t/z-height-upgrade/1509/1 "2022-12-31T03:34:42Z")

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I am upgrading my 48x96 Router Parts with V rollers to linear rails and very excited about it. I bought the original machine used and the previous owner had the higher Z height. When Avid sent the upgrade it has a standard Z height and risers. Will my taller risers work with the standard Z height or was that a special or modified Z that the previous owner had bought? It’s only a couple inches and I know the lower risers will be more rigid but I rather the taller gantry. I have a 4th axis (rotary) that I have never used but would like to do I want the extra height. Any help would be appreciated.

Derek.

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**Author:** ![subnoize](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/subnoize/32/2197_2.png) [@subnoize](https://forum.avidcnc.com/u/subnoize)\
**Post date:** [January 20, 2023, 2:05pm UTC](https://forum.avidcnc.com/t/z-height-upgrade/1509/2 "2023-01-20T14:05:34Z")

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I would use the standard 8 inch risers, never taller. The more height you add the more ringing will be present and the more flexing the gantry will do in the Y axis direction.

You can use the 12" Z axis with the standard 8" risers. I have dual 12" axis on my gantry. It will get those long tools away from the stock if you decide to cut foam.