I had an old Troyke DL-9 rotary table that I wanted to use on my Haas VF-4 years ago (The Troyke rotary table came off a Milltronics machine CNC mill). By coincidence, the Troyke table used the identical motor as the Haas X,Y,Z axis on that machine. When calling the local Haas dealer, the service coordinator just kinda blew me off and told me it couldn't be done. But, then the service manager talked me through changing the settings and parameters and we got it working.

However... ...The Troyke DL9 rotary table wore out, and it is very unreliable, so I am now purchasing a new Haas 210 rotary table. I should have just purchased a Haas rotary table in the first place...