# Base offset oddity

**URL:** <https://forum.universal-robots.com/t/base-offset-oddity/15237>\
**Category:** Technical Questions\
**Created:** [July 1, 2021, 2:35pm UTC](https://forum.universal-robots.com/t/base-offset-oddity/15237 "2021-07-01T14:35:11Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![nnaylor](https://avatars.discourse-cdn.com/v4/letter/n/a9adbd/32.png) [@nnaylor](https://forum.universal-robots.com/u/nnaylor)\
**Post date:** [July 1, 2021, 2:35pm UTC](https://forum.universal-robots.com/t/base-offset-oddity/15237/1 "2021-07-01T14:35:11Z")

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I’m trying to figure out why there’s a strange offset relative to the base of the robot (CB3). From my expertly drawn picture, the center of our table reads 0 in the Y plane, but is not aligned with the center of the base. It’s a good 1/4" off. I could theoretically move the base over the 1/4", and the center of the table would be aligned with the center of the robot, but it’ll show as -0.25" in polyscope. Are there settings anywhere to adjust this? Does it need to be re-calibrated? We weren’t the ones that set up this robot, so we’re not entirely sure how the vendor did it.

[offset.pdf](https://forum.universal-robots.com/uploads/short-url/8cUnrBaUpLUNLts0iGRWmfbRqtH.pdf) (2.0 KB)

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**Author:** ![pho](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.universal-robots.com/pho/32/2275_2.png) [@pho](https://forum.universal-robots.com/u/pho)\
**Post date:** [July 1, 2021, 5:07pm UTC](https://forum.universal-robots.com/t/base-offset-oddity/15237/2 "2021-07-01T17:07:23Z")

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Here are a couple of possibilities.

1. The Tool Center Point is offset
2. Is the feature set to base when you are looking at the dimensions?