Oriental motor PK Series User manual

HM-7422
OPERATING MANUAL
Stepping Motor
PK Series TH
Geared Type
Thank you for purchasing an Oriental Motor product.
This Operating Manual describes product handling procedures and
safety precautions.
• Please read it thoroughly to ensure safe operation.
• Always keep the manual where it is readily available.
Introduction

Before using the motor
Only qualified personnel should work with the product.
Use the product correctly after thoroughly reading the section “Safety
precautions”.
The product described in this manual has been designed and manufactured
for use in general industrial machinery, and must not be used for any other
purpose. For the power supply use a DC power supply with reinforced
insulation on its primary and secondary sides. Oriental Motor Co., Ltd. is not
responsible for any damage caused through failure to observe this warning.

Hazardous substances
RoHS (Directive 2002/95/EC 27Jan.2003) compliant
Safety precautions
The precautions described below are intended to prevent danger or injury to
the user and other personnel through safe, correct use of the product. Use the
product only after carefully reading and fully understanding these
instructions.
Handling the product without observing the instructions that accompany a
“Warning” symbol may result in serious injury or death.
• Do not use the product in explosive or corrosive environments, in the
presence of flammable gases, locations subjected to splashing water, or
near combustibles. Doing so may result in fire or injury.
• Assign qualified personnel the task of installing, wiring,
operating/controlling, inspecting and troubleshooting the product. Failure
to do so may result in fire or injury.
• Provide a means to hold moving parts in place for applications involving
vertical travel. The motor loses holding torque when the power is shut off,
allowing the moving parts to fall and possibly causing injury or damage to
equipment.
• Install the motor in an enclosure in order to prevent injury.
• Keep the input-power voltage within the specified range to avoid fire.
• Connect the cables securely according to the wiring diagram in order to
prevent fire.
• Do not forcibly bend or push the connector. Doing so may fire.
• Do not forcibly bend, pull or pinch the cable. Doing so may fire.
• For the power supply use a DC power supply with reinforced insulation on
its primary and secondary sides. Failure to do so may result in electric
shock.
• Turn off the power in the event of a power failure, or the motor will
suddenly start when the power is restored and may cause injury or damage
to equipment.
• Do not disassemble or modify the motor. This may cause injury. Refer all
such internal inspections and repairs to the branch or sales office from
which you purchased the product.
Handling the product without observing the instructions that accompany a
“Caution” symbol may result in injury or property damage.
• Do not use the motor beyond its specifications, or injury or damage to
equipment may result.
• Do not touch the motor during operation or immediately after stopping.
The surface is hot and may cause a skin burn(s).
• Do not hold the motor output shaft or motor cable. This may cause injury.
• Provide an emergency-stop device or emergency-stop circuit external to
the equipment so that the entire equipment will operate safely in the event
of a system failure or malfunction. Failure to do so may result in injury.
• To prevent bodily injury, do not touch the rotating parts (output shaft) of
the motor during operation.
• Immediately when trouble has occurred, stop running and turn off the
driver power. Failure to do so may result in fire or injury.
• To dispose of the motor, disassemble it into parts and components as much
as possible and dispose of individual parts/components as industrial waste.
Precautions for use
• Conduct the insulation resistance measurement or withstand
voltage test separately on the motor and the driver
Conducting the insulation resistance measurement or withstand voltage test
with the motor and driver connected may result in injury or damage to
equipment.
• About grease of geared motor
On rare occasions, a small amount of grease may ooze out from the gearhead.
If there is concern over possible environmental damage resulting from the
leakage of grease, check for grease stains during regular inspections.
Alternatively, install an oil pan or other device to prevent leakage from
causing further damage. Oil leakage may lead to problems in the customer’s
equipment or products.
• Allowable torque
Operate the motor by making sure the sum of the acceleration/deceleration
torque at the starting/stopping of the motor and the load (friction) torque
doesn’t exceed the allowable torque. Operating the motor in excess of the
allowable torque may result in a damaged gear.
• Allowable speed range
Operate the motor at speeds within the allowable range. Operating the motor
at a speed outside the allowable range may result in a shorter gear life.
• Backlash
The gear output shaft is subject to backlash of 10 to 45´. To reduce the effect
of backlash, perform positioning operations from one direction only-either
from the CW direction or the CCW direction.
• Rotating direction of the gear output shaft
Rotating direction of the gear output shaft is identical with that of the motor
shaft in case that the reduction ratio are 3.6:1, 7.2:1 and 10:1, and it is
opposite direction in case that the ratio are 20:1 and 30:1.

Checking the product
Open the package and confirm that all of the following items are available.
To verify that the unit you’ve purchased is the correct one, check the model
number shown on the nameplate. Should you find any item missing or
damaged, contact the Oriental Motor sales office where you purchased the
product.
• Motor 1 unit
• Operating manual 1 copy
Installation
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Location for installation
The motor is designed and manufactured for installation in equipment.
Install it in a well-ventilated location that provides easy access for inspection.
The location must also satisfy the following conditions:
• Inside an enclosure that is installed indoors (provide vent holes)
• Operating ambient temperature
- 10 to +50 °C (+14 to +122 °F) (non-freezing)
• Operating ambient humidity 85% or less (non-condensing)
• Area that is free of explosive atmosphere or toxic gas (such as sulfuric gas)
or liquid
• Area not exposed to direct sun
• Area free of excessive amount of dust, iron particles or the like
• Area not subject to splashing water (rains, water droplets), oil (oil
droplets) or other liquids
• Area free of excessive salt
• Area not subject to continuous vibration or excessive shocks
• Area free of excessive electromagnetic noise (from welders, power
machinery, etc.)
• Area free of radioactive materials, magnetic fields or vacuum

How to install the motor
Install the motor onto an appropriate flat metal plate having excellent
vibration resistance and heat conductivity. When installing the motor, secure
it with four screws through the four mounting holes provided. Leave no gap
between the motor and plate.
Pilot holder
Metal plate
Mounting holes
Motor model Screw size Tightening torque Effective depth
PK243A(B)1-T
PK243DA(B)-T
PK264A(B)2-T
PK264DA(B)-T
M4 2 N·m
(280 oz-in)
8 mm
(0.31 in.)
∗ The square box in the motor type will contain a number representing the
gear ratio.
Note • Insert the pilot located on the motor’s installation surface
into the mounting plate’s countersunk or through hole.
• Do not loosen the gearhead-attaching screws
(four pcs.).

Installing a load
When connecting a load to the motor, align the centers of the motor’s output
shaft and load shaft. Be careful not to damage the output shaft or the bearings
when installing a coupling or pulley to the motor’s output shaft.

Permissible overhung load and permissible thrust load
The overhung load and the thrust load on the motor’s output shaft or gear
output shaft must be kept under the permissible values listed.
Permissible overhung load [N (lb.)]
Distance from the tip of
motor’s output shaft [mm (in.)]
Motor model
0
(0)
5
(0.20)
10
(0.39)
15
(0.59)
20
(0.79)
Permissible
thrust load
[N (lb.)]
PK243A(B)1-T
PK243DA(B)-T
10
(2.2)
14
(3.1)
20
(4.5)
30
(6.7) −15 (3.3)
PK264A(B)2-T
PK264DA(B)-T
70
(15.7)
80
(18)
100
(22)
120
(27)
150
(33) 40 (9)
∗ The square box in the motor type will contain a number representing the
gear ratio.
Connection
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Wiring diagram
Red White Blue
BB
Black
Yellow
Green
A
A
Red Blue
B
Black
Green
A
6 lead wire type 4 lead wire type
Inspection
It is recommended that periodic inspections be conducted for the items listed
below after each operation of the motor. If an abnormal condition is noted,
discontinue any use and contact your nearest office.
• Check for any unusual noises in the motor’s bearings (ball bearings) or
other moving parts.
• Are there any loose connector connections, or any scratches or signs of
stress in the motor cable?
• Are the motor’s output shaft (or gear output shaft) and load shaft out of
alignment?
• Unauthorized reproduction or copying of all or part of this manual is
prohibited.
• Oriental Motor shall not be liable whatsoever for any problems relating
to industrial property rights arising from use of any information, circuit,
equipment or device provided or referenced in this manual.
• Characteristics, specifications and dimensions are subject to change
without notice.
• While we make every effort to offer accurate information in the manual,
we welcome your input. Should you find unclear descriptions, errors or
omissions, please contact the nearest office.
• is a registered trademark or trademark of Oriental
Motor Co., Ltd., in Japan and other countries.
©
Copyright ORIENTAL MOTOR CO., LTD. 2008
Printed on Recycled Pape
r
• Please contact your nearest Oriental Motor office for further information.
Headquarters Tokyo, Japan
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Technical Support Tel:[phone]
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E-mail: [e-mail]
www.orientalmotor.com
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