Oriental motor RKII Series User Manual

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Thank you for purchasing an Oriental Motor product.

This 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.

HM-60085-6

5-Phase Stepping Motor

RKII

Series/

Motorized actuator

equipped with

RKII

Series

Built-in Controller Type

USER MANUAL

KCC-REM-OMC-066

KCC-REM-OMC-067

Introduction

Installation and

connection

Operation type and

setting

Method of control via I/O

Method of control via

Modbus RTU (RS-485

communication)

Method of control via

industrial network

Operation using the

OPX-2A

Inspection,

troubleshooting and

remedial actions

Appendix

Table of Contents

Other manuals for Oriental motor RKII Series

Operating Manual8 pages

Questions and Answers:

C
Candace TerryAug 19, 2025
What to do if my Oriental motor RKII does not operate?
- J
  John LongAug 19, 2025
  If your Oriental motor Engine isn't operating, several factors could be at play. If you're using an electromagnetic brake motor, ensure the connections between the electromagnetic brake and the driver are correctly established. Also, verify that the STOP input is turned OFF. In positioning operations, confirm that the position (distance) is properly set within the operation data. For continuous operation, make sure that both the FWD and RVS inputs are not simultaneously turned ON; only one should be active at a time.
Y
Yesenia BriggsAug 21, 2025
Why is my Oriental motor RKII operation unstable?
- R
  Randy NguyenAug 21, 2025
  Unstable operation of your Oriental motor Engine can stem from a few key issues. First, examine the connections between the driver, motor, and power supply to rule out any connection errors. Secondly, the “RUN current” or “STOP current” parameter might be set too low. Try returning these parameters to their initial values. If the operating current is too low, the motor torque will also be too low, leading to unstable operation.
Z
zwongAug 23, 2025
What to do if Oriental motor RKII is not excited?
- A
  Amanda Graham PhDAug 25, 2025
  If the Oriental motor Engine is not excited and its output shaft can be moved by hand, check the following: Ensure that the AWO input is turned OFF. If it's already off and the issue persists, verify that the FREE input is turned OFF as well. Confirming these inputs are off should allow the motor to become excited.
S
Seth WatsonAug 26, 2025
How to reduce excessive vibration in my Oriental motor RKII?
- H
  Hector CrawfordAug 26, 2025
  Excessive vibration in your Oriental motor Engine can often be attributed to the load being too small. Try lowering the operating current using the “RUN current” parameter. If the motor’s output torque is too large for the load, it can cause increased vibration.
G
garcialindaAug 27, 2025
Why is my Oriental motor Engine rotating in the wrong direction?
- L
  Linda WilsonAug 27, 2025
  If your Oriental motor Engine rotates in the direction opposite to what's specified, the "motor rotation direction" parameter is likely set incorrectly. You should check this parameter and adjust it accordingly.
M
Megan AndersonAug 29, 2025
What to do if the electromagnetic brake of my Oriental motor RKII does not release?
- M
  mitchellgrantAug 30, 2025
  If the electromagnetic brake on your Oriental motor Engine fails to release, the most likely cause is a lack of power supply to the brake. Check the connection of the electromagnetic brake to ensure it is properly powered.
L
Luis LarsonAug 31, 2025
Why does my Oriental motor Control Unit lose synchronism?
- L
  Lisa FreemanSep 1, 2025
  If your Oriental motor Control Unit loses synchronism during acceleration, deceleration, or operation, several factors could be at play. First, check for excessive load or significant load fluctuations during operation. If the issue persists even at low speeds (higher torque area), examine the load condition. Also, verify the alignment of the motor's output shaft and the load shaft. The starting pulse speed might be too high, so reduce it to stabilize starting. An insufficient acceleration or deceleration time could also be the culprit; increase it until starting stabilizes. Finally, consider the impact of noise and refer to p.36 for relevant measures.
T
twareSep 3, 2025
What to do if Oriental motor Control Unit motor does not operate?
- D
  Deanna JamesSep 3, 2025
  If the motor of your Oriental motor Control Unit does not operate, check the connection between the controller and driver to ensure the pulse signals are properly connected. In 2-pulse input mode, ensure that the CW and CCW inputs are not simultaneously ON; only one should be active at a time. If using 1-pulse input mode, the pulse signal should be connected to the PLS input, not the DIR input. For electromagnetic brake types, make sure a 24 VDC power supply is connected to CN1 and the electromagnetic brake is correctly connected.
W
wrightjonathanSep 5, 2025
How to reduce vibration in Oriental motor Control Unit?
- S
  Shelly DaySep 5, 2025
  If your Oriental motor Control Unit's motor vibration is excessive, begin by checking the alignment of the motor's output shaft and the load shaft. If the vibration decreases when you change the operating pulse speed, the motor is likely resonating. In this case, either change the operating pulse speed or select a smaller step angle.
J
james76Sep 7, 2025
Why does Oriental motor Control Unit rotate in the wrong direction?
- B
  Brian DavisSep 7, 2025
  If the motor of your Oriental motor Control Unit rotates in the opposite direction, and you are using 2-pulse input mode, the CW and CCW inputs might be reversed; connect CW pulse signals to the CW input and CCW pulse signals to the CCW input. If you are using 1-pulse input mode, the DIR input setting may be reversed; turn the DIR input ON for CW rotation and OFF for CCW rotation.

Oriental motor RKII Series Specifications

General

Insulation Class	Class B
Frame Size	60mm, 80mm
Power Supply	Single-Phase 200-230 VAC, Three-Phase 200-230 VAC
Dielectric Strength	1.5 kVAC for 1 minute
Ambient Humidity	85% or less (non-condensing)
Service Life	20000 hours

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