# Orientation of BASE coordinate system

**URL:** <https://forum.universal-robots.com/t/orientation-of-base-coordinate-system/2728>\
**Category:** Technical Questions\
**Created:** [September 13, 2018, 9:55am UTC](https://forum.universal-robots.com/t/orientation-of-base-coordinate-system/2728 "2018-09-13T09:55:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![anon30144596](https://avatars.discourse-cdn.com/v4/letter/a/e274bd/32.png) [@anon30144596](https://forum.universal-robots.com/u/anon30144596)\
**Post date:** [September 13, 2018, 9:55am UTC](https://forum.universal-robots.com/t/orientation-of-base-coordinate-system/2728/1 "2018-09-13T09:55:06Z")

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Hi,  
is there a way to easily modify the orientation of the base coordinate system?  
My use case is that I have an existing application (robot communicates with a host system, receiving and sending coordinates, joint angles, etc…). Now for mechanical reasons we need to rotate the robot base by 90degree. Is there a simple way to instruct the robot that robot base is rotated by 90degree?  
I am thinking of a system settings (similar to the mounting configuration) where one can set the base system…

Volker

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**Author:** ![m.birkholz](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.universal-robots.com/m.birkholz/32/7084_2.png) [@m.birkholz](https://forum.universal-robots.com/u/m.birkholz)\
**Post date:** [September 17, 2018, 11:06am UTC](https://forum.universal-robots.com/t/orientation-of-base-coordinate-system/2728/2 "2018-09-17T11:06:21Z")

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as there is no function for editing the base a solution would be defining a plane having the same orientation as the base coordinate system, setup the robot moving in the plane and rotate it on demand by editing the Rz param