Siemens alarm 25070: Axis %1 drift value too large
SINUMERIK axis/spindle alarm · Siemens 840D/810D powerline
What it means
The drift observed between position setpoint and actual value at standstill exceeded the value that drift compensation may apply. Persistent drift usually reflects converter/encoder offset problems rather than pure parameter issues, since compensation is meant to trim only small offsets.
Likely causes
- analog offset drift in the drive electronics (typical on aged 611D control boards)
- encoder zero-position offset or damaged signal conditioning
- temperature-dependent drift of measuring electronics
- drift compensation limits (DRIFT machine data group) set unrealistically tight
Replacement parts
We supply the following units for this alarm — tested, warranty-backed:
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6SN1118 control board (SIMODRIVE 611D)
drive · Check if others ruled out
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6FX2001 series encoder
encoder · Check if others ruled out
Need the part urgently?
Send us alarm 25070 with your machine details — typical RFQ turnaround is 24–48h.