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Q. What are the features of a servomotor?
A. Compared with a stepping motor, a servomotor can output constant torque in low- to high-speed ranges.
Unlike a stepping motor, which causes problems with vibration, noise, and heat generation, a servomotor
ensures smooth rotation without loss of control.
Q. What features does the JUNMA servodrive have compared with other servodrives?
A. Conventional servodrives require settings for a variety of functions, including servo gain settings. The
JUNMA servodrive works with minimal adjustments of two rotary switches instead of parameters.
Therefore, high-performance control is ensured with the same ease as a stepping motor.
Q. What machines can the JUNMA be used for?
A. The JUNMA can be used for almost all machines, including timing belts and ball screws. The JUNMA
cannot be used if the installation precision exceeds the recommended precision specified
in Coupling to
the Machine (page 22).
Q. What is "Servo ON"?
A. It refers to the application of power to the servomotor by turning ON the /S-ON I/O signal. When power is
applied to the motor, the position of the motor shaft will be locked unless a reference is input. In the servo
ON state, the servomotor is in a servo-locked state and will not move even if external force is applied.
Q. The red indicator on the front panel of the SERVOPACK is lit and the servomotor stopped
operating. What should be done?
A. The alarm has been turned on. The meaning of alarms and corrections vary with the display on the
indicator and the number of indicators that light. For details, refer to
Alarm (page 13).
Q. Why does the REF (green indicator) blink while the motor is in operation?
A. The REF blinks to indicate that a reference pulse is being input (i.e., the motor is rotating).Do not touch
the machine or motor shaft while the REF is blinking, no matter how slowly the motor is turning. For
details, refer to
Part Names and Functions (page 12).
Q. When is the FIL rotary switch for the reference filter setting used?
A. The FIL switch is used to smooth the reference input to the SERVOPACK. The initial value (0) may be
used in most cases. If the machine vibrates, increase the value. The higher the value is, the smoother the
motion becomes but the longer the position settling time will be. Settings up to 7 are available.
Q. The servomotor generates noise after the servomotor is turned on or after the value of the FIL
rotary switch for reference filter setting is changed. What should be done?
A. The JUNMA starts vibration detection when the servo is turned on, and makes automatic adjustments if
needed. While making these adjustments, some noise may be generated. Once the adjustments are
made, the adjusted value will be used until the setting of the FIL rotary switch for reference filter is
changed. Therefore, no further noise will be generated.
Q. The machine vibrates. What should be done?
A. The JUNMA detects machine vibration and makes automatic adjustments. Any unusual noise while the
machine is running may be caused by errors in the automatic adjustments. Increase the Reference Filter
Setting (FIL) by one, and then return to the previous setting. JUNMA will now be able to make the correct
automatic adjustments.
FAQs
FAQs
Terminology
FAQs
