Using shaft seals – Rockwell Automation MPL-xxxx Low Inertia Servo Motor 215 mm or Larger User Manual
Page 5
MP-Series Low-inertia Servo Motor with 215 mm or Larger Frame Size 5
Rockwell Automation Publication MP-IN002D-EN-P - January
•
Shaft seals are subject to wear and require periodic inspection and replacement.
Replacement is recommended every 3 months, not to exceed 12 months, depending on
use. Refer to
for more information on shaft seals.
•
Inspect the motor and seals for damage or wear on a regular basis. If damage or excessive
wear is observed, replace the item.
•
The brake option on this servo motor is a spring-set holding brake that releases when
voltage is applied to the brake coil. A separate power source is required to disengage the
brake. This power source can be applied by a servo motor controller or manual operator
control.
If system main power fails, holding brakes can withstand occasional use as stopping
brakes. However, this creates rotational mechanical backlash that can cause damage to
the system, increase brake wear, and reduce brake life.
Using Shaft Seals
An additional seal is required on the motor shaft near the motor front bearing if the shaft is
exposed to fluids or significant amounts of fine dust. This includes lubricating oil from a
gearbox. An IP66 rating for the motor requires the use of a shaft seal and environmentally sealed
connectors/cables. The additional seal is not recommended in applications where the motor
shaft area is free of liquids or fine dust, and a lower rating is sufficient:
•
Refer to
for a brief description of the IP rating for these
MP-Series motors.
•
Refer to
to find the catalog numbers of seal kits available for
your motor.
•
Refer to Kinetix® Motion Accessories Specifications, publicat
, to find
environmentally sealed connectors and cables compatible with the MP-Series motors.
IMPORTANT
Holding brakes are not designed to stop rotation of the motor shaft, and they are not intended to be used as a
safety device. They are designed to hold a motor shaft at 0 rpm for up to the rated brake holding torque.
Follow these steps to prevent motor shaft rotation.
1. Command the servo drive to 0 rpm.
2. Verify the motor is at 0 rpm.
3. Engage the brake.
4. Disable the drive.
Disabling the drive removes the potential for brake wear caused by a badly-tuned servo system oscillating
the shaft.