Fanuc alarm
While an axis was moving, it fell too far behind where the control told it to be (following error).
While an axis was moving, it fell too far behind where the control told it to be (following error). Something is making the axis work too hard, or the servo can't keep up.
Lock out the machine before reaching into it. Never bypass a door switch or interlock to clear an alarm.
Call a tech if the load meter is high, you hear noise, or it follows a crash. Running a binding axis can ruin the ballscrew and the servo motor.
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While an axis was moving, it fell too far behind where the control told it to be (following error). Something is making the axis work too hard, or the servo can't keep up.
Mechanical binding: tight gibs, damaged ways, a bent or worn ballscrew, bad support bearings. No way lube, or the wrong oil. Crash damage. Servo motor, encoder or amplifier problem. Feed or acceleration parameters set too high.
Note the axis and whether it happens at rapid or only in feed. Jog the axis slowly through its full travel with the handwheel and watch the load meter. A spike in one spot points to a mechanical tight spot. Check way lube level and lube pump operation. Listen for grinding or knocking from the ballscrew or bearings. Ask the operators about any recent crash. Call a tech if the load meter is high, you hear noise, or it follows a crash. Running a binding axis can ruin the ballscrew and the servo motor.
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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