# 3d milling question

**URL:** <https://forum.onefinitycnc.com/t/3d-milling-question/22496>\
**Category:** Original/PRO Series (Buildbotics) (Gen 1)\
**Created:** [September 22, 2023, 6:43pm UTC](https://forum.onefinitycnc.com/t/3d-milling-question/22496 "2023-09-22T18:43:56Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![349iq2345](https://avatars.discourse-cdn.com/v4/letter/3/bb73d2/32.png) [@349iq2345](https://forum.onefinitycnc.com/u/349iq2345)\
**Post date:** [September 23, 2023, 5:09am UTC](https://forum.onefinitycnc.com/t/3d-milling-question/22496/7 "2023-09-23T05:09:16Z")

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Hey Fred,

> [@Fred11](#):
>
> Could it have an impact if the sounding plate is in one direction or the other?

I am not sure, maybe if the surface is not milled flat. I have read [in another thread](https://forum.onefinitycnc.com/t/xyz-probe-offsets-differ/22160/5) that the Onefinity touch plate has no fantastic tolerances

> [@Fred11](#):
>
> Leaving the controller running constantly could be a solution but I’m not thrilled but I have no choice.  
> Afterwards I do not understand these shifts and given the capacities and the functioning of the machine they should not happen.

Does it change something if you leave the controller on? Do you mean, does the difference in Z height then not occur?

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