# Z probe sets wrong hght

**URL:** <https://forum.onefinitycnc.com/t/z-probe-sets-wrong-hght/25470>\
**Category:** Uncategorized\
**Created:** [February 22, 2024, 1:35am UTC](https://forum.onefinitycnc.com/t/z-probe-sets-wrong-hght/25470 "2024-02-22T01:35:07Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ynot](https://avatars.discourse-cdn.com/v4/letter/y/a698b9/32.png) [@ynot](https://forum.onefinitycnc.com/u/ynot)\
**Post date:** [February 22, 2024, 1:35am UTC](https://forum.onefinitycnc.com/t/z-probe-sets-wrong-hght/25470/1 "2024-02-22T01:35:07Z")

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After I posted this I remembered that when I first got my machine, I checked that it had the 20mm slider, I’ll wager that 1f sent me an SD card set for the 16mm, so will try to reset it next time am in the shop,  
Onefinity sent new SD card, installed it this morning, machine seems to be operating normally except for the Z hght probe or surface zero.  
Machine responds to game controller as usual, when I probed for Z, using the probe block, started the carve & the router was cutting air. when I brought the tool bit down to Z zero, it is about 1/4" above the surface of the material.  
When I set Z zero at the surface of the material, it seems to run ok, but a pocket that is set for 10 mm and reads 10 mm on the depth cut is only about 5mm deep. Also when the z motor is lowering the router it is taking much more time than before.

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**Author:** ![OnefinityCNC](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/onefinitycnc/32/7_2.png) [@OnefinityCNC](https://forum.onefinitycnc.com/u/OnefinityCNC)\
**Post date:** [February 22, 2024, 3:14pm UTC](https://forum.onefinitycnc.com/t/z-probe-sets-wrong-hght/25470/2 "2024-02-22T15:14:51Z")

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> [@How To Reset The Configuration To Defaults (BB Controller)](https://forum.onefinitycnc.com/t/how-to-reset-the-configuration-to-defaults-bb-controller/2547):
>
> Occasionally, there may be a time when you need to reset the machine back to factory defaults. Here’s how to perform a configuration reset. Please note, resetting the configuration will change any custom values you have entered (i.e. probe size, stall homing settings). Please make note of these BEFORE resetting so you can input them back in once reset. Always ensure you’re on the latest firmware (as some of these options are not available in older firmware) first by checking here: [Latest Fir…](https://forum.onefinitycnc.com/c/firmware/firmware/98)

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**Author:** ![ynot](https://avatars.discourse-cdn.com/v4/letter/y/a698b9/32.png) [@ynot](https://forum.onefinitycnc.com/u/ynot)\
**Post date:** [February 22, 2024, 3:24pm UTC](https://forum.onefinitycnc.com/t/z-probe-sets-wrong-hght/25470/3 "2024-02-22T15:24:12Z")

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I reset the machine to default, after some thought & it did not change the machines behavior. But the machine acting as if it has the 16mm Z axis when it should be set for the 20mm Z slider would explain why the machine is responding properly except in the Z height.  
Please let it be this.