Hello, 

In some cases, Vive trackers flip their axes.

In Manage Devices try using the Up Rotated option.

Hi! I've the same problem and tried the up rotated option, but it does not solve the issue for me, is there another way to manipulate the axis? My setup is 4 base stations and a vive tracker 3.0 mounted on a camera, no HMD or Controllers.

Hello,

what you are facing is most likely caused by improper settings in your Origin, Forward point, and Right point.

I recommend checking this video for more guidance:

https://youtu.be/S9BWYH4Fnu0

Also, in Aximmetry, after adding the tracked cam compound, you can navigate to the INPUTS control board.
Here you select ORIGIN 1:

In the pin values, next to Delta Head Transformation, you simply have to add the correct rotation settings (in our case either a +270 or a -90 rotation in the first field since the tracker is facing downwards):

This will transform the rotation of the marker.

Please note, that your setup might be different, and you might need to adjust this setting, and/or add other rotations as well. You will also certainly need to add a transformation to the position values to compensate for the distance between the tracker and the rotation center.

1Lotus: Since you have a Broadcast edition, we recommend using Camera Calibrator. 

Calibration needs patience and the more properly set up it is, the better the tracking.

What should one do if one tracker needs Up Rotated and the other tracker does not need Up Rotated? there is only one universal setting in OpenVR right?

Hi Jim,

We answered your question in the separate thread: https://my.aximmetry.com/post/1866-htc-vive-trackers-with-different-orienta

Warmest regards,