Fagor alarm 4013: Position deviation too high (oriented/C-axis spindle)

What it means

When the spindle runs closed-loop in position - orientation, rigid tapping or C-axis work - the drive watches actual-versus-command deviation; breaching the monitored window raises this at the CNC. Slipping encoder rings, binding quill or gains set too soft show up here first. Generic 'drive error' text means consult the drive's own code for detail.

Likely causes

• orientation encoder slipping relative to spindle shaft
• hydraulic/pneumatic orienter or brake dragging
• position-loop gains/window parameters mismatched
• mechanical stiction during final orientation approach

Replacement parts

We supply the following units for this alarm — tested, warranty-backed:

• Rotary spindle orientation encoder + coupling

  encoder · Common cause

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