Rockwell Automation 1325L DC Motors User Manual User Manual
Page 13
DC Motors
13
In addition to observing the above precaution, all precautions (Attentions)
mentioned in this document should be observed. The following items must
be checked before starting and during operation.
•
The armature should rotate freely and be clear of any obstructions.
•
The brushes should move easily in their holders and should make
proper contact on the commutator.
•
The interior of the motor should be clean and dry.
•
Connections must be tight.
•
The driven machine should be unloaded, if possible.
When starting, small sparks may appear on the commutator due to particles
of dirt. Other than this. there should be little, if any, sparking at the brushes.
Important: Machines designed for cooling by a separate source of forced
ventilation must not be operated without the air supply. Be sure
blower is running in proper direction.
While operating the motor, observe the performance. It should run smoothly
with little noise. The bearings should not overheat and should reach a
leveling off temperature. Any undue noise, overheating, sparking or erratic
performance should be investigated and necessary corrective action taken
immediately to prevent serious damage. Before attempting any repairs,
please contact your Allen-Bradley Sales Office.
All motors are lubricated before shipment and will operate for a long period
before regreasing is required. The period will vary depending on
environmental and service conditions. Refer to
!
ATTENTION: Surface temperature of the motor enclosure may
reach temperatures which can cause discomfort or injury to
personnel coming into contact with hot surfaces. The user must
apply appropriate guards and/or shields to protect against
accidental contact. Failure to observe this precaution may result
in personal injury.