# Z-axis Problem

**URL:** <https://community.inventables.com/t/z-axis-problem/17374>\
**Category:** Troubleshooting\
**Created:** [December 16, 2015, 2:39pm UTC](https://community.inventables.com/t/z-axis-problem/17374 "2015-12-16T14:39:42Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![NicholasKurgin](https://avatars.discourse-cdn.com/v4/letter/n/f07891/32.png) [@NicholasKurgin](https://community.inventables.com/u/NicholasKurgin)\
**Post date:** [December 16, 2015, 2:39pm UTC](https://community.inventables.com/t/z-axis-problem/17374/1 "2015-12-16T14:39:42Z")

</div>

Hi, I am using the Universal Gcode Sender with my x-carve. My x-carve has the acme threaded rod for the z- axis. When I tell the machine to move 1 millimeter it moves 1.67 millimeters instead. Is this because of the acme rod or is there a problem with my moter? Thanks for your replies

---

<div class="post-metadata">

**Author:** ![LarryM](https://yyz1.discourse-cdn.com/flex009/user_avatar/community.inventables.com/larrym/32/51450_2.png) [@LarryM](https://community.inventables.com/u/LarryM)\
**Post date:** [December 16, 2015, 2:48pm UTC](https://community.inventables.com/t/z-axis-problem/17374/2 "2015-12-16T14:48:22Z")

</div>

Take a look at this thread.

> [@Steps/mm Calibration](https://community.inventables.com/t/steps-mm-calibration/10705):
>
> I found this video through the X-Carve sub-Reddit ([r/X-Carve](https://www.reddit.com/r/XCarve/)) and thought it might be helpful! [[X-Carve DIYCNC Router - Calibration of steps/mm] ](https://www.youtube.com/watch?v=TzkoMbb9pO8)