# Z Axis Depth Test

**URL:** <https://forum.onefinitycnc.com/t/z-axis-depth-test/6470>\
**Category:** Uncategorized\
**Created:** [June 30, 2021, 6:36pm UTC](https://forum.onefinitycnc.com/t/z-axis-depth-test/6470 "2021-06-30T18:36:46Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![JDog](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/jdog/32/2056_2.png) [@JDog](https://forum.onefinitycnc.com/u/JDog)\
**Post date:** [June 30, 2021, 6:36pm UTC](https://forum.onefinitycnc.com/t/z-axis-depth-test/6470/1 "2021-06-30T18:36:46Z")

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@OnefinityCNC  
After running this test I determined that my z Axis is off by .09 what would be the best way to make the adjustment to fix this?

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**Author:** ![cyberreefguru](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/cyberreefguru/32/27385_2.png) [@cyberreefguru](https://forum.onefinitycnc.com/u/cyberreefguru)\
**Post date:** [July 9, 2021, 5:51pm UTC](https://forum.onefinitycnc.com/t/z-axis-depth-test/6470/2 "2021-07-09T17:51:12Z")

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You can make adjustments to the travel-per-revs in the settings menu:

> [@Testing and tuning OF for accuracy](https://forum.onefinitycnc.com/t/testing-and-tuning-of-for-accuracy/1846/15):
>
> I promised I would write the procedure I used to test and adjust the accuracy of the OF, so here it is. Decided to add it to this thread rather than create a new one. Things you will need: OF Woodworker (same process for machinist, but adjust sizes) an accurate 36" ruler (a mm rule would be easier, but I didn’t have one) 1/4" shank, 1/4" 45 degree v-bit (larger bits will work, but makes it more difficult to see) Blue tape or masking tape Optional - fine grained 12" machinist ruler Process: …

-Tom