# VCarve V Bit X, Y, Z Probing **URL:** \ **Category:** Original/PRO Series (Buildbotics) (Gen 1)\ **Created:** [July 1, 2021, 1:59pm UTC](https://forum.onefinitycnc.com/t/vcarve-v-bit-x-y-z-probing/6482 "2021-07-01T13:59:23Z")\ **Posts on this page:** 1\ **Showing post:** 25
**Author:** ![ChrisM](https://avatars.discourse-cdn.com/v4/letter/c/47e85d/32.png) [@ChrisM](https://forum.onefinitycnc.com/u/ChrisM)\ **Post date:** [November 30, 2022, 10:37am UTC](https://forum.onefinitycnc.com/t/vcarve-v-bit-x-y-z-probing/6482/25 "2022-11-30T10:37:54Z")
Well I’m not Ron but… Have you check for scaling errors? If the X axis is scaling everything too small then your work will always be shifted to the left when your datum is set to bottom left. Here is a link that explains it. > [@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: … Another thing to check is the probe block settings. They could be off for the X. There is a post somewhere on that. --- _[View the full topic](https://forum.onefinitycnc.com/t/vcarve-v-bit-x-y-z-probing/6482)._