# Homing/Probe Z Issues on buildbotics

**URL:** <https://forum.onefinitycnc.com/t/homing-probe-z-issues-on-buildbotics/39112>\
**Category:** Troubleshooting (X35/X50)\
**Created:** [June 12, 2026, 8:07pm UTC](https://forum.onefinitycnc.com/t/homing-probe-z-issues-on-buildbotics/39112 "2026-06-12T20:07:06Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![northof49ww](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/northof49ww/32/34586_2.png) [@northof49ww](https://forum.onefinitycnc.com/u/northof49ww)\
**Post date:** [June 12, 2026, 8:07pm UTC](https://forum.onefinitycnc.com/t/homing-probe-z-issues-on-buildbotics/39112/1 "2026-06-12T20:07:06Z")

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I did a 2 hour carve that required 6 bit changes, I probed Z at every change and they all went off without a hitch, except for the last one. When I probed Z I received the error message in photo 1. After numerous tries I ended up changing playing with the safe Z in my program (Carveco) and was able to finish the carve.

I proceeded to to start another carve and when I homed the machine (X50 with Buildbotics) nothing zeroed, it went the numbers in photo 2, it’s never done that before. I unhomed everything, rehomed and the everything was greyed out as in picture 3, but at least they were zeroed, but now every time I hit home it goes back to the numbers in photo 2.

Help is appreciated, thank you in advance.

 ![Photo 2](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/0/a/0a2b121d6b39d5c6c3113f006ca3711c6074adb1.jpeg)

 ![Photo 1](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/5/0/5009918291a06868204391206693cc7bb6506d5e.jpeg)

 ![Photo 3](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/0/9/094eacee175e7900bb897dbe87e9f6f7d001da88.jpeg)

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<div class="post-metadata">

**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:** [June 12, 2026, 8:12pm UTC](https://forum.onefinitycnc.com/t/homing-probe-z-issues-on-buildbotics/39112/2 "2026-06-12T20:12:12Z")

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Each bit should be it’s own file on the bb controller due to this issue.

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<div class="post-metadata">

**Author:** ![northof49ww](https://sea2.discourse-cdn.com/flex022/user_avatar/forum.onefinitycnc.com/northof49ww/32/34586_2.png) [@northof49ww](https://forum.onefinitycnc.com/u/northof49ww)\
**Post date:** [June 12, 2026, 10:28pm UTC](https://forum.onefinitycnc.com/t/homing-probe-z-issues-on-buildbotics/39112/3 "2026-06-12T22:28:13Z")

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Thank you for the reply.

Each bit was a separate file.

I don’t think that would cause the homing issue either.