Originally Posted by
AccuMillGuy
I have a Fanuc 3M controlled Yuasa AccuMill AM-1547.
Yesterday I turned on the machine and tried to Reference Point Return X, Y, Z. The X & Y returned to 0 but Z did not. Once the Z axis moved to with in 0.25” of 0, it alarmed out - “Servo Alarm 02 - The READY signal (VRDY) of velocity unit has turned off.”
We shutdown the machine and restarted it. Once again we returned the X & Y axis to reference point successfully but we had the same alarm when attempting to return Z to 0.
We once again shutdown the machine and restated it. This time the machine started up with a NOT READY ALARM and we were unable to move the Z axis in the ‘+’ (up) direction, only in the ‘-‘ (down) direction. In the process of trying to figure out what’s going on we ended up with the Z axis in the –Z over travel position.
Now Z is stuck all the way down, sitting on the limit switch, and we can not do anything with Z.
Even when we hold down the Limit Switch Release button Z will not move. When we hold down the LSR button the flashing NOT READY ALARM turns in to a flashing ALARM.
We have double and triple checked the fuses and all three servo contactors pull in properly when we hold the LSR button.
I need help :-(