FANUC Alarm DMDR-009 — Large synch errror (G:… M:…)
Manufacturer wording — Large synch errror (G:%d M:%d)
The manual prints placeholders; your controller fills them in with the real group, axis or number.
FANUC DMDR-009 (“Large synch errror (G:… M:…)”): The servo error inconsistency between a master axis and a slave axis is too large. First check: See that no mechanical problem exists.
Updated 2026-09-17 · LogrobotLM reference
Description
The servo error inconsistency between a master axis and a slave axis is too large. That is, $DUAL_DRIVE.$SYNC_ER has exceeded $DUAL_DRIVE. $SYNC_ER_TOL.
Remedy
See that no mechanical problem exists. Or, tune synchronous compensation parameters again. Calibration will be lost when this error is posted.
Related codes
Indicative field information — the robot manufacturer's manual and safety procedures always prevail. Never bypass a safety device; apply lockout/tagout (LOTO) before any physical intervention. How this reference is built →