Rockwell Automation Publication TLP-IN001A-EN-P - October 2019
3
Kinetix TLP Servo Motors with 046…235 mm Frame Size
Prolong Motor Life
Proper design and maintenance can increase the life of a servo motor. Follow these guidelines to maximize the life of a servo motor operated within
the
:
•
Always provide a drip loop to carry liquids away from the connection to the motor.
• Whenever possible, provide shields that protect the motor housing, shaft, seals, and their junctions from contamination by foreign matter
or fluids.
• 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. See
for more information.
• Inspect the motor and seals for damage or wear on a regular basis. If you detect damage or excessive wear, 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.
Shaft Seals
An additional seal is required on the motor shaft near the motor front bearing if the shaft is exposed to significant amounts of fine dust or fluids,
such as lubricating oil from a gearbox. An IP65 rating for the motor requires a shaft seal and environmentally sealed connectors and 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:
• See
for a brief description of the IP rating for these motors.
for seal kits compatible with your motor.
• See Kinetix Rotary Motion Specifications Technical Data, publication
, for Bulletin 2090 cables with environmentally sealed
connectors compatible with these motors.
Couplings and Pulleys
Mechanical connections to the motor shaft, such as couplings and pulleys, require a torsionally rigid coupling or a reinforced timing belt. The high
dynamic performance of servo motors can cause couplings, pulleys, or belts to loosen or slip over time. A loose or slipping connection causes system
instability and can damage the motor shaft. All connections between the system and the servo motor shaft must be rigid to achieve acceptable
response from the system. Periodically inspect connections to verify their rigidity.
When mounting couplings or pulleys to the motor shaft, verify that the connections are properly aligned and that axial and radial loads are within
the specifications of the motor. See
for guidelines to achieve 40,000 hours of motor bearing life.
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 loads 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.
Correct: Position the motor so that the cable enters from beneath
the motor and forms a drip loop.
This configuration applies to
TLP-A046-
xxx
, TLP-A070-
xxx
,
TLP-A090-075, and TLP-A100-
xxx
motors
.
This configuration applies to
TLP-A115-
xxx
, TLP-A145-
xxx
,
TLP-A200-
xxx
, and TLP-A235-
xxx
motors.
Incorrect: The cable
lacks a drip loop.
Incorrect: The cable
lacks a drip loop.