Originally Posted by
NC Cams
I'll assume that the lathe is of the BMDC, PC based EZ Path lathe configuration.
If so, check to see if the parameter file was inadverantly rewritten - if the calendar on the PC is correct, it would show a rewrite date. A screwed up paramter file might cause that sort of sitaution.
Hopefully, you have the original system disk. If so, a re-install of the system software might be in order to refresh/correct the parameter file for your machine. It might also "fix" something that he "unfixed".
We have a rule in my shop: if you walk up to a machine and do something "special", you reset the machine to the way you found it - no exceptions. THis way, some wakydoodle reset doesn't result in a "...I cannot for the life of me figure out what he did or how he did it...." situation.
You might also want to check any interconnection wiring. If the position feedback is incorrect, the machine may think that the diameter of the part you're trying to turn is infinitely small thus the reason for the max'd out RPM.
Systematically going thru the instructions to turn ON the CSS programming with your guy may be of help. Perhaps a "show me what you did" recreation effort might be of help in figuring out how he haunted your lathe.
YOu can bet it will be something simple, dumb and subsequently costly to correct....