[BELT_FED]

Our new to us MV-Jr with fanuc 10m controller doesn't go to 45 degrees if you program it to do so. It's about 34 degrees. I think there is a parameter that is not set correctly. It's like the machine thinks one revolution of the 4th axis (a) is 39* degrees instead of 360. Any help would be appreciated. thanks

[shas595]

Hello,

what if you do 90 degrees, does it got to actual 68? And what if you command 45 degrees, and then tell it to -45 degrees, does it return exactly to where it should?
John

[BELT_FED]

If you program any degree in any direction it runs short of the actual angle. It thinks there is 392 degrees in a rotation..

[drdos]

Has this ever worked on this machine? I would first verify that the coupling is not slipping. The find out how many pulses your motor encoder has. Then you need to set parameter 1816 to match that encoder.