Download General Precautions

EDB series AC servo system User's manual V. 2.01
7． Press ENTER to return to function number display.(Servo is OFF)
5.2.4 Reference Offset Automatic Adjustment
The motor may rotate slowly when the reference voltage is intended to be 0 V. This occurs when the host controller
or external circuit has a small offset (measured in mV) in the reference voltage.
The reference offset automatic adjustment mode automatically measures the offset and adjusts the reference
voltage. It adjusts both speed and torque references.
The following diagram illustrates automatic adjustment of an offset in the reference voltage from the host controller or
external circuit.
After completion of offset automatic adjustment, the amount of offset is stored in the Servodrive.
The amount of offset can be checked in the speed reference offset manual adjustment mode. Refer to Reference
Offset Manual Adjustment Mode for details
The reference offset automatic adjustment mode cannot be used where a position loop is formed with the host
controller and the error pulses are zeroed when servo lock is stopped.
In this case, use the speed reference offset manual adjustment mode. Refer to Reference Offset Manual
Adjustment Mode for details.
Zero-clamp speed control is available to force the motor to stop during zero speed reference. Refer to Using ZeroClamp for details.
Follow the procedure below to automatically adjust the reference offset:
1． Input the (intended) 0 V reference voltage from the host controller or external circuit.
2． Press Mode to select assistant function mode.
3． Press INC or DEC key to select function number of speed reference offset.
4． Press ENTER to enter mode that automatically adjust the reference offset.
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