I need to get the backlash reduced in my CNC machine. The backlash seems to be in the support bearings of the ball screws. I do not see any way to adjust this out?
Attached is a picture from the old manual and also some pictures of the real machine.
I am not sure if there is a way to adjust these or if you have to buy new bearings? Even though this machine is old, it has not had that much run time and it is in very good condition. It was never used in production and only for teaching programming at a college.
I have about .0030 to -.0034 backlash in the Y axis and about .0013 to .0014 in the X. I need to remeasure to get more accurate than that, but that is about what it is.
It has been awhile since I converted this to AC servos from the old Fanuc DC servos it used to have, but last time I was in there, I did not see any way to adjust it, but maybe their is, or maybe I need to shim it somehow? Or....maybe there is nothing you can do with these bearings except buy new ones?
This is a Pratt and Whitney Tapemate C, which is basically the first Fanuc Robodrill I guess.
Let me know if any more information is needed.