MAINTENANCE
MH-Series with MotoMount Positioner Manual 7-16 MOTOMAN
7.9 Troubleshooting
7.9.1 MH-series Positioners
7.9.2 MotoMount
High Duty Cycles
High duty cycles under heavy loads and/or dirty operating conditions may cause
the drive bushing to wear. This may be indicated by an increase in the tooling
position repeatability. Call Motoman Customer Service for details.
Table 7-7 Troubleshooting
Symptom Probable Cause Corrective Action
Motor does not start
Loose connection Check all wire connections.
Incorrect wiring Check that system has been wired correctly.
Overload Reduce load or reduce unbalanced load.
Unstable operation Incorrect wiring Inspect and correct wiring across motor terminals L1, L2, L3,
and PE.
Motor overheats
Excessive ambient
temperature
Reduce ambient temperature below 40° C (104° F). Positioner
has an operating range of 0 to 45° C (32 to 113°F).
Motor surface is dirty Clean motor surface.
Motor overloaded Reduce load or unbalanced load.
Unusual noise
Motor loosely
mounted
Tighten mounting bolts.
Positioners mis-
aligned
Realign headstock/tailstock (see Section 4.5 Leveling and Secur-
ing Optional Tailstock.
Noisy bearing Check alignment, noise of bearing, lubrication. Call Motoman
Service.
Weld quality bad Brushes misaligned Remove brush(s) and reinstall them properly. Recheck as
needed.
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