# QVIO Issues with y and z values flipped

Source: https://forum.modalai.com/topic/2567/qvio-issues-with-y-and-z-values-flipped
Category: VOXL 2 and VOXL 2 Mini (https://forum.modalai.com/category/26/voxl-2-and-voxl-2-mini)
Tags: voxl-2
Posted: 2023-08-14 22:42:20 UTC by Aaron Porter
Replies: 1 · Views: 639

## Aaron Porter · 2023-08-14 22:42:20 UTC

Hey,

 So I am running into a qvio issue where when I move the drone forwards and backwards the x values are correct. However when I move the drone left to right the Z values are changing and moving the drone up and down causes the y values to change. I have the VOXL2 board attached to the drone at a roll of 90 degrees. I thought that when I edited the extrinsic file to have the voxl-imu rolled 90 from the body that QVIO would adjust the y and z values to match the body movements. I am looking at the qvio values from the qvio-sever page in voxl-portal.   

Thank you,
Aaron

## Reply by Aaron Porter · 2023-08-28 15:44:09 UTC

So this is the correct functionality, and that the Data is updated relative to the IMU and not to the Body of the Drone.