Omron R88M-K Series User Manual (English)

Questions and Answers:

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Bradley JacksonAug 18, 2025
What to do if Omron Servo Drives are overloaded?
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  Ryan AguilarAug 19, 2025
  If you're encountering an overload with your Omron Servo Drives, it means the feedback value for torque command exceeds the overload level specified in the Overload Detection Level Setting (3512 hex). Check if torque (current) waveforms oscillate or excessively oscillate vertically during analog output or communications. Review the overload warning display and the load rate through communications. You can increase the capacities of the Servo Drive and the Servomotor, set longer acceleration and deceleration times, and reduce the load. Alternatively, try readjusting the gain.
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Daniel FosterAug 22, 2025
Why do Omron R88M-K overheat?
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  Karina MillerAug 22, 2025
  If your Omron Servo Drives are overheating, it's because the temperature of the Servo Drive radiator or power elements exceeded the specified value. To resolve this, improve the ambient temperature and the cooling conditions of the Servo Drive. Also, consider increasing the capacities of the Servo Drive and the Servomotor, setting longer acceleration and deceleration times, and reducing the load.
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Tracy FrostAug 25, 2025
What causes overvoltage in Omron R88M-K?
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  vanessabrownAug 26, 2025
  An overvoltage in Omron Servo Drives occurs when the power supply voltage exceeds the allowable input voltage range. To address this, measure the voltage between the connector (L1, L2, and L3) lines and input the correct voltage. Remove the phase advance capacitor. Use a tester to measure the resistance of the external resistor between the B1 and B2 terminals on the Servo Drive; if the resistance is infinite, the wiring is broken, so replace the external resistor. You might also need to change the regeneration resistance and wattage to the specified values by calculating the regenerative energy and connecting an External Regeneration Resistor with the required regeneration absorption capacity and reducing the descent speed. If all else fails, replace the Servo Drive.
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Allison GardnerAug 27, 2025
Why Omron R88M-K Servo Drives show main circuit power supply undervoltage?
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  Caroline GreenAug 28, 2025
  If you're experiencing a main circuit power supply undervoltage with your Omron Servo Drives, it could be due to a momentary power interruption between L1 and L3 for longer than the value specified for the Momentary Hold Time (3509 hex), or the voltage between the positive and negative terminals in the main power supply converter dropped below the specified value while the servo was ON. Measure the voltage between the connector (L1, L2, and L3) lines. Increase the power supply voltage, or change the power supply. Eliminate the cause of the failure of the electromagnetic contactor on the main circuit power supply, and then turn ON the power again. Check the setting of the Momentary Hold Time (3509 hex). Set each phase of the power supply correctly. Increase the power supply capacity.
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Roy JamesAug 31, 2025
What to do for error counter overflow in Omron R88M-K?
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  Katelyn NunezAug 31, 2025
  If you're seeing an error counter overflow with your Omron Servo Drives, it means position error pulses exceeded the setting of the Following Error Window (6065 hex). Check to see if the Servomotor rotates according to the position command pulse. Check on the torque monitor to see if the output torque is saturated. Adjust the gain. Maximize the set values on the Positive torque limit value (60E0 hex) and the Negative torque limit value (60E1 hex). Wire the encoder as shown in the wiring diagram. Lengthen the acceleration and deceleration times. Reduce the load and speed. Increase the set value of object 6065 hex.
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Sherry GeorgeSep 2, 2025
What causes control power supply undervoltage in Omron Servo Drives?
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  Kelly ToddSep 2, 2025
  A control power supply undervoltage in Omron Servo Drives indicates that the voltage between the positive and negative terminals in the control power supply converter dropped below the specified value. Measure the voltage between the L1C and L2C lines on the connectors and the terminal block. Increase the power supply voltage, change the power supply, increase the power supply capacity, or replace the Servo Drive.
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Matthew PerrySep 5, 2025
How to fix encoder communication error in Omron R88M-K Servo Drives?
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  Sharon SingletonSep 6, 2025
  If you're experiencing an encoder communications error with your Omron Servo Drives, it's likely due to noise affecting the data from the encoder. To fix this, provide the required encoder power supply voltage 5 VDC ±5% (4.75 to 5.25 V), paying special attention when the encoder cable is long. If the Servomotor cable and the encoder cable are bundled together, separate them. Also, connect the shield to FG.
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Kyle RamosSep 8, 2025
What does excessive hybrid deviation error mean for Omron Servo Drives?
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  Miss Cindy Farrell DDSSep 9, 2025
  If you're getting an excessive hybrid deviation error on your Omron Servo Drives, it means that during fully-closed control, the difference between the load position from the external encoder and the Servomotor position from the encoder was larger than the number of pulses set as the Hybrid Following Error Counter Overflow Level (3328 hex). Check the Servomotor and load connection. Check the external encoder and Servo Drive connection. When moving the load, check to see if the change in the Servomotor position (encoder feedback value) has the same sign as the change in the load position (external encoder feedback value).

Omron R88M-K Series Specifications

General

Protection Class	IP20
Type	Servo Drive
Communication	EtherCAT
Motor Type	AC Servo Motor
Encoder	Incremental, Absolute
Protection Functions	Overcurrent, Overvoltage, Undervoltage, Overheat, Encoder Error
Output Current	Varies by model
Control Method (PWM)	Sine-wave PWM control