[Greg McKaskle]

There doesn't really seem to be enough symptom to diagnose the issues. I'll just list a few things.

1. Make sure that the VI being used is Mecanum Cartesian. The Polar version is not intended for direct joystick inputs, but rather mathematically based autonomous.
2. Check the wheel orientations. The two shown clearly in the photo are correct. The other two should be the mirror image left-to-right of what is shown.
3. On blocks, check other joystick inputs and summarize the results. Observe what pure Y, pure -Y, pure X, pure -X, look like. also use the twist or rotation parameter with no X and Y.

Perhaps a bigger set of correct and incorrect results will help identify the issue.

Also, I don't believe a gyro or lack of gyro is the issue, as the VI I was looking at has no knowledge of a gyro. Perhaps there is an example that incorporates a gyro, but the default expectation seems to be a robot-centric holonomic drive system.

Greg McKaskle