Hello trebu2020,
I see no one has responded to this post yet. So at this point I would recommend contacting your local Xerox Support Department to speak with a Product Specialist for more assistance.
Would anyone have experience getting the Phaser 6510 to work with Ubuntu 18. After installing the printer and picking the correct ppd I can ONLY print in B/W and I can't do things like change DPI or even pick the correct paper tray. Thanks!