Rockwell Automation W-Series User Manual

Installation Instructions

W-Series Brushless Servo Motor

(Catalog Number W-3016-N, W-4030-M, W-4030-P, W-4050-P, and W-4075-R)

These installation instructions describe how to install the W-Series
motors. Use this document if you are responsible for installing,

®

maintaining, or troubleshooting the Allen-Bradley
products. Please read all instructions before installing the motor.

For: See Page

Receiving and Maintenance Information 2

Motor Catalog Number Identification 2

Before You Install the Motor 3

Guidelines for Installation and Maintenance 4

Prolonging Washdown Motor Life 4

Using Couplings and Pulleys 5

Building and Installing Cables 6

Preventing Electrical Noise 7

Using Shaft Seals 8

Installing Your Motor 9

Mounting Dimensions 14

Connector Data 16

Motor Load Force Ratings 17

Radial Load and Axial Load Force Ratings 17

Shaft Seals 18

Using Shaft Seals 18

Removal and Installation of Shaft Seals 18

Shaft Seal Kits 20

Interconnect Cables 20

W-Series motor

Publication 1398-IN520A-EN-P — May 2001

2 W-Series Motor Installation Instructions

Receiving and Maintenance Information

The customer is responsible for inspecting the equipment before
accepting the shipment from the freight company. Check the item(s) you
receive against your purchase order. Notify the carrier of any shipping
damage immediately.

W-Series (washdown) motors are designed for long-term use in harsh
environments. However, you should store your motor for future use
within the following environmental conditions:

• in a clean, dry location

• within the storage temperature range, -30° to 70° C (-22° to 158° F)

• within the relative humidity range, 5% to 95% non-condensing

• in an non-corrosive atmosphere

Motor Catalog Number Identification

W - 3 016 - N - H 00 AA

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FACTORY DESIGNATED OPTIONS
AA Teflon Shaft Seal for above foodline applications
AB Viton Shaft Seal for below foodline applications

OPTIONS
00 Standard

OPTICAL ENCODER LINE COUNT
H 2000 Standard

MOTOR WINDING Ke DESIGNATOR

TORQUE RATING / MOTOR LENGTH DESIGNATOR

FRAME SIZE

SERIES DESIGNATOR
W Washdown

W-Series Motor Installation Instructions 3

ATTENTION

!

Before You Install the Motor

Before installing or storing the motor:

1. Remove the motor carefully from its shipping container.

2. Visually inspect the motor for any damage.

3. Examine the motor frame, front output shaft, and mounting pilot for

any defects.

Do not open or attempt to open the motor while power
is applied to the motor.

Only a qualified Allen-Bradley employee can service this
type of motor. However, the user can access the power
and feedback connectors by removing the back cover.

Failure to observe these safety procedures could result
in personal injury or damage to equipment.

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4 W-Series Motor Installation Instructions

Guidelines for Installation and Maintenance

The following sections provide general installation and maintenance
information. The information should assist you to correctly install and to
provide maintenance that will prolong the lifetime of your W-Series servo
motor.

Prolonging Washdown Motor Life

Thoughtful design and proper maintenance can increase the life of a
washdown motor. The following are guidelines to maximize the life of a
servo motor in a washdown environment:

• Avoid spraying liquids under high pressure directly on the junction of

the motor shaft and housing. Fluids under high pressure can be forced
around worn seals, and contaminate the motor bearings. Bearing
contamination will significantly shorten the life of a servo motor.

If design requirements permit, provide shields that protect the motor
housing, shaft, seals and their junctions from product contamination
and high pressure fluids.

• Always use watertight cord grips (cable glands) to seal the encoder and

power cable openings, and provide a drip loop in each cable.

• If conduit encloses the power or encoder cables:

– Ensure that conduit lines do not have a negative pressure (vacuum)

that may draw water into the conduit line or motor enclosure.

– Install a short section of flexible conduit between the motor and the

rigid conduit to prevent machine vibration or constant pressure from
causing cable abrasion or motor misalignment.

• Replace the shaft seal at or before its expected lifetime.

– Teflon seals have an expected lifetime of 3 to 6 months.
– Viton seals have an expected lifetime of 12 months or greater.

Refer to Shaft Seals on page 18 for more information on shaft seals.

• Inspect the motor and seals for damage or wear on a regular basis. If

damage or adverse wear is suspected, replace the item.

Publication 1398-IN520A-EN-P — May 2001

W-Series Motor Installation Instructions 5

ATTENTION

!

Using 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 will cause
system instability and may 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, ensure that the
connections are properly aligned and that axial and radial loads are within
the specifications of the motor. Refer to Motor Load Force Ratings on
page 17 for guidelines on how to achieve 20,000 hours of motor bearing
life.

Damage may occur to the motor bearings and the
feedback device if sharp impact to the shaft is applied
during installation of couplings and pulleys. Damage to
the feedback device may result by applying leverage
from the motor mounting face to remove devices
mounted on the motor shaft.

Do not strike the shaft, couplings, or pulleys with tools
during installation or removal. Use a wheel puller
applying pressure from the user end of the shaft to
remove any friction fit or stuck device from the motor
shaft.

Failure to observe these safety procedures could result
in damage to the motor and its components.

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6 W-Series Motor Installation Instructions

ATTENTION

!

Building and Installing Cables

Knowledgeable cable routing and careful cable construction improves
system ElectroMagnetic Compatibility (EMC). Refer to Installing Your
Motor on page 9 for suggested feedback and power cable trim lengths,
and for cable shield grounding at the motor frame.

To build and install cables, perform the following steps:

1. Keep wire lengths as short as physically possible.

2. Route signal cables (encoder, serial, analog) away from motor and

power wiring.

3. Separate cables by 0.3 m (1 ft) minimum for every 9 m (30 ft) of parallel

run.

4. Ground both ends of the cable shield and twist the signal wire pairs to

prevent electromagnetic interference (EMI) from other equipment.

High voltage can be present on the shield of a power
cable, if the shield is not grounded.

Ensure there is a connection to ground for any
power cable shield.

Failure to observe these safety procedures could
result in personal injury or damage to equipment.

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W-Series Motor Installation Instructions 7

Preventing Electrical Noise

ElectroMagnetic Interference (EMI), commonly called noise, may
adversely impact motor performance by inducing stray signals. Effective
techniques to counter EMI include filtering the AC power, shielding and
separating signal carrying lines, and practicing good grounding
techniques.

Effective AC power filtering can be achieved by using isolated AC power
transformers or properly installed AC line filters.

To help avoid EMI:

• Physically separate signal lines from motor cabling and power wiring.

Do not route signal wires with motor and power wires, or over the vent
openings of servo drives.

• Ground all equipment using a single-point parallel ground system that

employs ground bus bars or large straps. If necessary, use additional
electrical noise reduction techniques to reduce EMI in noisy
environments.

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8 W-Series Motor Installation Instructions

Using Shaft Seals

A seal is required on the motor shaft near the motor front bearing to
reduce exposure to fluids or fine dust that could contaminate the motor
bearing and reduce its lifetime. Refer to Motor Catalog Number
Identification on page 2 to identify the Frame Size and Shaft Seal type for
a particular motor. Refer to Shaft Seals on page 18 for usage information.

Publication 1398-IN520A-EN-P — May 2001