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2-Phase Stepping Motor Unit
RBK Series
OPERATING MANUAL
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.
Table of contents
1 Introduction ................................... 2
2 Safety precautions......................... 4
3 Precautions for use ....................... 7
4 Preparation.................................... 9
4.1 Checking the product...................... 9
drivers ........................................... 10
4.3 Names and functions of parts ....... 12
5 Installation ................................... 14
5.1 Location for installation ................. 14
5.2 Installing the motor ....................... 14
5.3 Installing a load............................. 16
permissible thrust load.................. 17
5.5 Installing the driver........................ 19
with EMC Directive ....................... 22
6 Connection .................................. 25
6.1 Connection example ..................... 25
6.2 Connecting the power supply ....... 28
terminal box type motor................ 31
6.5 Grounding the driver .................... 35
6.6 Connecting the I/O signals ........... 36
6.7 Input/output signals ...................... 37
6.8 Timing chart.................................. 41
7 Settings ........................................42
7.1 Smooth drive function .................. 42
7.2 Vibration suppression function ..... 43
function......................................... 43
7.4 Step angle .................................... 44
7.5 Motor current ................................ 45
8 Protective functions......................47
and numbers of LED blinks .......... 47
9 Inspection.....................................48
actions..........................................49
11 Options (sold separately) .............51
HP-7445-10
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Summary of Contents for Oriental motor RBK Series
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Page 1: Table Of Contents
2-Phase Stepping Motor Unit RBK Series OPERATING MANUAL 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. -
Page 2: Introduction
Overview of the product The RBK series is a unit product consisting of an encased microstep driver with built-in smooth drive function, and a 2-phase stepping motor or a geared motor designed for high torque. -
Page 3: Hazardous Substances
• The names of products certified to conform with relevant standards are represented by applicable unit model motor and driver part numbers. • For unit models, Oriental Motor declares conformance with the EMC Directive individually. • The temperature-rise test, as required by the UL Standards, is conducted with the aluminum heat sink attached. -
Page 4: Safety Precautions
2 Safety precautions 2 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 Warning accompany a “Warning”... -
Page 5: Operation
2 Safety precautions Installation • To prevent the risk of electric shock, use the motor and driver for class I equipment only. • Install the motor and driver in their enclosures in order to prevent electric shock or injury. • Install the motor and driver so as to avoid contact with hands, or ground them to prevent the risk of electric shock. -
Page 6: Maintenance And Inspection
2 Safety precautions Transportation • Do not hold the motor output shaft or motor cable. This may cause injury. Installation • Keep the area around the motor and driver free of combustible materials in order to prevent fire or a skin burn(s). •... -
Page 7: Precautions For Use
3 Precautions for use 3 Precautions for use This section covers limitations and requirements the user should consider when using the RBK series. • Do not operate the driver internal switches other than the SW1, SW2, RUN and DATA Changing the switch settings may cause a product malfunction or cause damage to the product. - Page 8 3 Precautions for use • Geared type motor Backlash The PL gear output shaft is subject to backlash of 20′ to 35′. Backlash refers to the looseness at the gear output shaft, as generated when the input side of the gear is fixed.
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Page 9: Preparation
4 Preparation 4 Preparation This section covers the points to be checked along with the names and functions of the respective parts. 4.1 Checking the product 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. -
Page 10: Combinations Of Motors And Drivers
4 Preparation 4.2 Combinations of motors and drivers Standard type motor Unit model Motor model Driver model Single shaft Double shaft Single shaft Double shaft RBK264A RBK264B PK264DA PK264DB RBD242A-V RBK266A RBK266B PK266DA PK266DB RBK268A RBK268B PK268DA PK268DB RBK296A RBK296B PK296DA PK296DB RBK299A... - Page 11 4 Preparation PL geared type motor Unit model Motor model Driver model Single shaft Double shaft Single shaft Double shaft RBK244PA-P5 RBK244PB-P5 PK244PDA-P5 PK244PDB-P5 RBD215A-K RBK244PA-P10 RBK244PB-P10 PK244PDA-P10 PK244PDB-P10 RBK244PA-P36 RBK244PB-P36 PK244PDA-P36 PK244PDB-P36 RBK266PA-P5 RBK266PB-P5 PK266PDA-P5 PK266PDB-P5 RBD228A-K RBK266PA-P10 RBK266PB-P10 PK266PDA-P10 PK266PDB-P10 RBK264PA-P36 RBK264PB-P36 PK264PDA-P36 PK264PDB-P36 Terminal box type motor Unit model...
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Page 12: Names And Functions Of Parts
4 Preparation 4.3 Names and functions of parts This section covers the names and functions of parts in the motor and driver. • Standard type motor, high-torque type motor and PL geared type motor Illustration shows the PK26 type. Mounting holes (4 locations) Pilot Output shaft... - Page 13 4 Preparation • Driver Name Description POWER LED (green) Lit when the power is on. This LED blinks when the protective function was triggered and the ALARM output has turned OFF ALARM LED (red) as a result. The triggered protective function can be checked by counting the number of times the LED blinks.
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Page 14: Installation
5 Installation 5 Installation This chapter explains the installation location and installation methods of the motor and driver, as well as how to install a load. The installation and wiring methods in compliance with the EMC Directive are also explained. 5.1 Location for installation The motor and driver are designed and manufactured for installation in equipment. - Page 15 5 Installation The temperature-rise test, as required by the UL Standards, is conducted with the aluminum heat sink attached. The size and thickness of the heat sink are as described below. Motor model Size [mm (in.)] Thickness [mm (in.)] PK26 400 ×...
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Page 16: Installing A Load
5 Installation 5.3 Installing a load When connecting a load to the motor, align the centers of the motor’s output shaft and load shaft. Also, keep the overhang load and thrust load under the permissible values. • Using a coupling Align the centers of the motor’s output shaft and load shaft in a straight line. -
Page 17: Permissible Overhung Load And Permissible Thrust Load
5 Installation 5.4 Permissible overhung load and permissible thrust load The overhung load and the thrust load on the motor’s output shaft must be kept under the permissible values listed below. Note Failure due to fatigue may occur when the motor bearings and output shaft are subject to repeated loading by an overhung or thrust load that is in excess of the permissible limit. - Page 18 5 Installation Permissible overhung load [N (lb.)] Distance from the tip of Permissible Motor type motor’s output shaft [mm (in.)] ∗ thrust load (0.20) (0.39) (0.59) (0.79) PK244PD -P5 − 50 (11.2) (16.4) (18.9) (22) (27) PK244PD -P10 PK244PD -P36 −...
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Page 19: Installing The Driver
5 Installation 5.5 Installing the driver Installation direction The driver is designed so that heat is dissipated via air convection and conduction through the enclosure. When installing the driver in an enclosure, it must be placed in a perpendicular (vertical) orientation. There must be a clearance of at least 25 mm (0.98 in.) in the horizontal and vertical directions, respectively, between the driver and enclosure or other equipment within the enclosure. - Page 20 5 Installation • Using driver mounting holes Install the driver by securing it with two screws (M3, not supplied) through the mounting holes provided. Leave no gap between the driver and metal plate. M3 (not supplied) • Mounting to DIN rail Use a DIN rail 35 mm (1.38 in.) wide to mount the driver.
- Page 21 5 Installation Pull the DIN lever down, engage the upper hooks of the DIN rail mounting plate over the DIN rail, and push the DIN lever until it locks in place. DIN rail DIN lever Secure the driver with end plate. End plate Do not use the mounting holes (M3, three locations) for the DIN rail Note...
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Page 22: Installing And Wiring In Compliance With Emc Directive
Failure to do so may result in serious impairment of the machine’s functionality. The use of the following installation and wiring methods will enable the RBK series motor and/or driver to be compliant with the EMC Directive. Oriental Motor conducts EMC measurements its RBK series motors and drivers in accordance with “Example of motor and driver installation and wiring”... -
Page 23: Grounding Method
5 Installation Grounding method When grounding the driver and mains filter, use a cable of the largest possible size and connect to the ground point over the shortest distance so that no potential difference will be generated at the grounded position. The ground point must be a large, thick and uniform conductive surface. - Page 24 5 Installation Example of motor and driver installation and wiring Motor User Driver Controller Motor cable Cable [2 m (6.6 ft.)] clamp (Shielded cable) I/O cable Cable Cable [2 m (6.6 ft.)] clamp clamp (Shielded cable) Mains DC power filter supply Power supply cable Cable...
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Page 25: Connection
6 Connection 6 Connection This section covers the methods and examples of connecting and grounding the driver, motor, power and controller, as well as the input/output signals. 6.1 Connection example Either 5 or 24 VDC can be used as the signal voltage for the PLS input, and DIR input. - Page 26 6 Connection 5 VDC or line driver input: Driver RBD215A-K, RBD228A-K: 20 to 40 VDC RBD242A-V, RBD245A-V: 20 to 75 VDC VDC+ Motor lead wires Controller PNP type Controller NPN type (5 VDC) (5 VDC) 200 Ω PLS+ PLS- Photocoupler input 5 VDC 200 Ω...
- Page 27 6 Connection 24 VDC: Driver RBD215A-K, RBD228A-K: 20 to 40 VDC RBD242A-V, RBD245A-V: 20 to 75 VDC VDC+ Motor lead wires Controller NPN type Controller PNP type (24 VDC) (24 VDC) 2.7 kΩ PLS24+ Photocoupler input PLS- 24 VDC Input current: 2.7 kΩ...
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Page 28: Connecting The Power Supply
6 Connection 6.2 Connecting the power supply For the driver’s power supply use a DC power supply with reinforced Warning insulation on its primary and secondary sides. Failure to do so may result in electric shock. Connecting the power supply to the driver’s power supply terminal. Use a power supply that can supply the following current capacity. -
Page 29: Connecting And Grounding The Standard Type Motor, High-Torque Type Motor And Pl Geared Type Motor
6 Connection • Recommended driver power supply circuit Bridge rectifier ∗3 Reinforced insulation type transformer ∗1 Capacitor ∗2 Bleed resistor 22 kΩ 1 W Transformer Capacitor Bridge Driver model capacity (∗1) capacity (∗2) rectifier (∗3) RBD215A-K 100 VA RBD228A-K 4700 µF RBD242A-V 400 VA 10 A... - Page 30 6 Connection • Connector type motor With a high-torque type and PL geared type, a connector is used for connection on the motor side. Use the supplied motor cable. Note • When connecting a motor, affix the cable at the connection part to prevent the connection part from receiving stress due to the flexing of the cable.
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Page 31: Connecting And Grounding The Terminal Box Type Motor
6 Connection 6.4 Connecting and grounding the terminal box type motor Pin assignments of motor terminal Signal Terminal block Terminal block Description No. of RBK26 No. of RBK29 name A-phase output A-phase output B-phase output B-phase output Check the terminal numbers, and connect them correctly and securely. Wrong Note connection of leads or poor contact may damage the driver. - Page 32 6 Connection Loosen the terminal block screws, insert the lead wire into the opening, and then Terminal block tighten the screws. Tightening torque: 0.6 N·m (85 oz-in) 1 2 3 4 5 Note Terminal No. 1 is not used. Do not connect any cables. If an internal Protective Earth Terminal is used, ground the Protective Earth Terminal by referring to “Grounding method”...
- Page 33 6 Connection Connecting the RBK29 Use a multi-core cable [outer diameter: 7 to 13 mm (0.28 to 0.51 in.)] of AWG22 to 16 (0.3 to 1.25 mm ) and round terminal for connection with the motor. Loosen the 4 terminal block cover screws (M3) and remove the terminal block cover from the motor.
- Page 34 6 Connection Insert the gasket into the receptacle, confirm that the sheath of the multi-core cable is securely sealed with the gasket, and then tighten the cap. Tightening torque: 4 to 5 N·m (560 to 710 oz-in) Adjust the tightening torque depending on the diameter and material of the cable.
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Page 35: Grounding The Driver
6 Connection 6.5 Grounding the driver Be sure to ground the Protective Earth Terminal (screw size: M4) of the driver. Use a grounding wire of AWG18 (0.75 mm ) or more in diameter, and ground the cable near the driver with a round terminal. Do not share the grounding wire with a welder or power equipment. -
Page 36: Connecting The I/O Signals
6 Connection 6.6 Connecting the I/O signals Connecting the I/O signals to the driver’s CN1. Keep the wiring distance as short as possible [less than 2 m (6.6 ft.)] to suppress the effect of noise. Note • The D-Sub (15-pin) connector and the hood for connecting to the driver’s CN1 connector are not included. -
Page 37: Input/Output Signals
6 Connection 6.7 Input/output signals Input signals The signal state represents the “ON: Carrying current” or “OFF: Not carrying current” state of the internal photocoupler. • Example of connection with a • Example of connection with a current sink output circuit current source output circuit 5 VDC, 24 VDC 5 VDC, 24 VDC... - Page 38 6 Connection 24 VDC The controller pulses are connected to the PLS24+ input (pin No.2) or the PLS− input (pin No.9), and the rotation direction is connected to the DIR24+ input (pin No.10) or DIR− input (pin No.11). • When the DIR input is ON, a fall of the PLS input from ON to OFF will rotate the motor one step in the CW direction.
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Page 39: Output Signals
6 Connection • AWO (all windings off) input Use the signal only when the motor’s output shaft must be rotated manually for position adjustment (ON: 4.5 to 26.4 V, OFF: 0 to 1 V). • When the AWO input is turned ON, the driver stops supplying current to the motor and the motor’s holding torque is lost. - Page 40 6 Connection • ALM (alarm) output ALM output remains ON when the driver is operating normally, then turns OFF when a protective function is triggered. Error detection by the driver, such as overheat, overvoltage and overcurrent during motor operation, turns the ALM output OFF, blinks the ALARM LED on the driver, and simultaneously shuts off the motor current to stop motor operation.
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Page 41: Timing Chart
6 Connection 6.8 Timing chart Motor operation 5 s or more ∗4 Power supply input 0.5 s or more ∗1 ∗1 ∗3 10 µs or more 300 µs or more PLS input ∗5 DIR input ∗2 AWO input 300 µs or more CS input DATA Basic step angle... -
Page 42: Settings
7 Settings 7 Settings This chapter explains how to set the driver functions. Third harmonic waveform correction function switch (SW1) Smooth drive function switch (SW2-1) Vibration suppression function switch (SW2-2) Not used (SW2-3) Motor standstill current setting ∗ switch (SW2-4) Motor operating current setting switch (RUN) Step angle setting switch (DATA) -
Page 43: Vibration Suppression Function
7 Settings 7.2 Vibration suppression function This function reduces vibration during medium-speed operation. Use an insulated precision screwdriver to change the ON/OFF position of the vibration suppression function switch (SW2-2). Factory setting: OFF (used) • When the vibration suppression function is not used, set the vibration suppression function switch to ON. -
Page 44: Step Angle
7 Settings 7.4 Step angle Select a desired motor step angle from among the 16 preset levels. Use an insulated precision screwdriver to change the dial of the step angle setting switch (DATA). The step angle is calculated by dividing the base step angle of the motor by the number of divisions. -
Page 45: Motor Current
7 Settings 7.5 Motor current Set the motor current using the motor operating current setting switch (RUN) and motor standstill current setting switch (SW2-4). When the load is light and there is a margin for motor torque, the motor’s operating vibration and the temperature increase of the motor and driver can be held down by lowering the motor’s operating current and standstill current. - Page 46 7 Settings Standstill current Set a rate of reduction with respect to the set operating current. The standstill current is calculated by multiplying the operating current with the specified rate of reduction. Use an insulated precision screwdriver to change the ON/OFF position of the motor standstill current setting switch (SW2-4).
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Page 47: Protective Functions
8 Protective functions 8 Protective functions This section covers the driver-protection functions and methods used to clear the triggered function. 8.1 Descriptions of protective functions and numbers of LED blinks The driver is provided with functions that protect the driver from overheat, overvoltage and overcurrent. -
Page 48: Inspection
9 Inspection 9 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, stop the use and contact your nearest office. Inspection items • Are the motor installation screws loose? •... -
Page 49: Troubleshooting And Remedial Actions
10 Troubleshooting and remedial actions 10 Troubleshooting and remedial actions During motor operation, the motor or driver may fail to function properly due to an improper speed setting or wiring. When the motor cannot be operated correctly, refer to the contents provided in this section and take appropriate action. If the problem persists, contact your nearest office. - Page 50 10 Troubleshooting and remedial actions Phenomenon Possible cause Remedial action The centers of the motor’s Check the connection condition output shaft and load shaft are of the motor output shaft and not aligned. load shaft. Check for large load fluctuations during motor operation.
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Page 51: Options (Sold Separately)
11 Options (sold separately) Phenomenon Possible cause Remedial action The centers of the motor’s Check the connection condition output shaft and load shaft are of the motor output shaft and not aligned. load shaft. If the vibration decreases when the operating pulse speed is changed, it means the motor is resonating. - Page 52 If a new copy is required to replace an original manual that has been damaged or lost, please contact your nearest Oriental Motor branch or sales office. • 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.
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