Firstly i believe the FW driver should be set to unidirectional by standard, this will certainly help by eliminating rotation direction since stopping position has a big change when switching direction.
Secondly it seems the stop position varies when the filter wheel moves 1 position or 2 and more positions, a fix could be to force the filter wheel to move a full rotation.
I would love if the person making the driver could get in contact with me about this because i'd love to be able to help find a fix for this ASAP before more people gets the filter wheel and find the same problem.
Yes, thanks for your report.
And sorry for the trouble. And because the Corona virus outbreak, So it may take some time to solve it.
Hope you can understand. Sorry again.
Sorry for the problem.
We analyzed the problem. It should be caused by some structural problems, so I am afraid it is difficult to solve now.