# Z Axis is grinding during movement; video link inside

**URL:** <https://community.inventables.com/t/z-axis-is-grinding-during-movement-video-link-inside/15203>\
**Category:** Troubleshooting\
**Created:** [October 31, 2015, 9:18pm UTC](https://community.inventables.com/t/z-axis-is-grinding-during-movement-video-link-inside/15203 "2015-10-31T21:18:33Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![NathanButler](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/nathanbutler/32/21390_2.png) [@NathanButler](https://community.inventables.com/u/NathanButler)\
**Post date:** [November 1, 2015, 1:41pm UTC](https://community.inventables.com/t/z-axis-is-grinding-during-movement-video-link-inside/15203/5 "2015-11-01T13:41:50Z")

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Thanks David. I ended up just running the Z axis up and down like 40 times. It’s moving smoothly now, but during the break-in I noticed the Acme threaded rod wasn’t exactly straight. Should I be concerned about that? I’d say the rod looked about 1/16" bowed in the center from both ends.

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