Stepper motor moving at 0 velocity every 16,4 seconds

Hi

I hope i post this topic in the good section, if not please tell me where is the best place to post it

Here is the hardware we are using:

- PXI-1033 updated firmware

- PXI-7330 updated firmware

- Stepper motor 

- Driver Danaher motion No P70360 (updated firmware) adapted to the stepper

Here is the software we are using:

- NI Motion Assistant (updated)

- Labview 2014

Here is the problem:

We are running test but the motor position change by one every 16,4 seconds. We performed tons of velocity/acceleration/jerk tests and so on but nothing change the position drift.

We then try a 0 velocity test but every 16,4 seconds, the motor perform a new step. Idea? Suggestions?

The problem happens with Ni Motion AND LabView

Ty for your help!

LaDyf