# Onefinity BB Buildbotics Rotary A Axis Settings in Rotary Mode (FAQ)

**URL:** <https://forum.onefinitycnc.com/t/onefinity-bb-buildbotics-rotary-a-axis-settings-in-rotary-mode-faq/35389>\
**Category:** Official FAQs\
**Created:** [September 12, 2025, 8:11pm UTC](https://forum.onefinitycnc.com/t/onefinity-bb-buildbotics-rotary-a-axis-settings-in-rotary-mode-faq/35389 "2025-09-12T20:11:07Z")\
**Posts on this page:** 4\
**Page:** 1

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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:** [September 12, 2025, 8:11pm UTC](https://forum.onefinitycnc.com/t/onefinity-bb-buildbotics-rotary-a-axis-settings-in-rotary-mode-faq/35389/1 "2025-09-12T20:11:07Z")

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These are the correct settings for the BB Buildbotics controller when the A axis (rotary) mode is enabled:

## Rotary MUST be used in Metric with the Metric PP Only!

**Metric:**

 ![Metric A axis enabled BB](https://us1.discourse-cdn.com/flex022/uploads/onefinitycnc/original/3X/3/0/30dce9a1f0ace952f3f323dc398c74ac3badd557.jpeg)

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**Author:** ![csutton](https://avatars.discourse-cdn.com/v4/letter/c/22d042/32.png) [@csutton](https://forum.onefinitycnc.com/u/csutton)\
**Post date:** [November 9, 2025, 2:51pm UTC](https://forum.onefinitycnc.com/t/onefinity-bb-buildbotics-rotary-a-axis-settings-in-rotary-mode-faq/35389/2 "2025-11-09T14:51:19Z")

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Hello. I have found it difficult to find reliable Onefinity specific data associated with Buildbotics Onefinity with Rotary. The one problem I have is that I think and work using imperial units. From what you are saying, I need to use the Onefinity BB WrapY2S (mm) post processor. My goal at the moment is to laser engrave several Yeti mugs I have for family, so my question to you is: 1) If I go ahead and use the above (mm) post processor, do I then need to change my default units in VCarve to metric (mm)? 2) Do I then also need to switch my BB controller default units to metric (mm) also? If both 1) and 2) are yes, then I am basically stuck using metric from hence forward. Is there a plan to create an imperial (in) wrapping post processor? Thanks.

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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:** [November 9, 2025, 4:46pm UTC](https://forum.onefinitycnc.com/t/onefinity-bb-buildbotics-rotary-a-axis-settings-in-rotary-mode-faq/35389/3 "2025-11-09T16:46:35Z")

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Nope, when doing work in imperial units in your cad then exporting in metric, the post processor does the conversions automatically.

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**Author:** ![csutton](https://avatars.discourse-cdn.com/v4/letter/c/22d042/32.png) [@csutton](https://forum.onefinitycnc.com/u/csutton)\
**Post date:** [December 7, 2025, 5:12pm UTC](https://forum.onefinitycnc.com/t/onefinity-bb-buildbotics-rotary-a-axis-settings-in-rotary-mode-faq/35389/4 "2025-12-07T17:12:35Z")

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I appreciate the quick reply and didn’t not have notification turned on to notice this straight away. Have a great day and Happy Holidays!