Motorized rotation help

I want to rotate a sheet film using a motorized rotation assembly, controlled through Arduino and Labview interface. I am not sure how to start. It would be really helpful if any sort of help or guidance would be given. I had considered purchasing motorized rotating mounts, but those are expensive

You have a picture?

I don't have my own design, but it is a sheet film 0.75 um thick, that needs to be mounted to something which rotates, similar to the assembly in the picture attached here.

Slip ring connector