Have you tried checking the diagnostics for the Y axis..?
Go to the start of the last page on the diagnostics screen I think it's No: 801
It should be around 0 sometrimes -1 or +1 ifthe motor is working ok. There are other diagnostics to check and they are listed in the Fanuc Maintenance manual...i'de have to look them up as I can't remember them without checking my manual!
John. |