Fanuc alarm
The control lost clean communication with a servo motor's encoder (pulse coder).
The control lost clean communication with a servo motor's encoder (pulse coder). The data coming back was bad or missing.
Lock out the machine before reaching into it. Never bypass a door switch or interlock to clear an alarm.
Encoder and cable repairs usually need a tech. Replacing an absolute encoder also means setting the axis reference again.
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The control lost clean communication with a servo motor's encoder (pulse coder). The data coming back was bad or missing.
Damaged encoder cable, often in the cable carrier. Coolant in the encoder connector. Failed encoder on the back of the motor. Bad connection at the amplifier.
Note the axis. Look along the encoder cable for cuts, crushed spots or wear. Check the connector at the motor for coolant or corrosion. Note whether it happens only at one spot in the travel (a flexing cable). Encoder and cable repairs usually need a tech. Replacing an absolute encoder also means setting the axis reference again.
Alarm numbers and text can differ by control model, software version and machine builder. This page is a starting point from people who have worked on these machines, not a replacement for your machine builder's manual.
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