
HM-4002-8
OPERATING MANUAL
Stepping Motor
PK Series, PX Series 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.,
td. is not responsible for any damage caused
through failure to observe this warning.
Hazardous substances
(PK series only)
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.
Warning
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.
Caution
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 burn.
• 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
unning and turn off the driver power. Failure to do
so may result in fire or injury.
• Conduct the insulation resistance measurement
or withstand voltage test separately on the motor
and the driver. Failure to do so may result in injury
or damage to equipment.
• 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
• 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
Backlash is the angle of free rotation (i, e. play) of
the output shaft when the reduction gear’s input
section is fixed. If backlash can become a problem
when positioning uses bidirectional rotation, control
sequences should be designed so that the output
shaft is stopped from only unidirectional, forward or
reverse.
• Rotating direction of the gear output shaft
The direction of rotation of the motor and gearhead
shaft relative to each other is determined by the
reduction gear ratio as follows:
S: Same direction
O: Opposite direction
Reduction ratio
Geared motor
model
1:3.6
to
1:10
1:18 1:36
1:50
to
1:100
PX243G01-0 -O --
PK243-SGS O O S
PK264-SGS O O S
PK296-SGS S O -
Checking the product
Upon opening the package, verify that the items
listed below are included. Report any missing or
damaged items to the branch or sales office from
which you purchased the product.
• Motor 1 Unit
• Screws 4 pcs.
Check the model number of the motor against the
number shown on the nameplate.
Installation
Location for installation
The motor is designed and manufactured for
installation in equipment.
Install it in a well-ventilated location that provides
asy 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% maximum
(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