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Troubleshooting
Noise on encoder wires
Z-phase signal is not output.
The circuit for Z-phase signal is not
correct.
The motor produces an abnormal sound and/or vibration.
Category
Adjustment
The gains are too large.
The velocity detection filter is not
proper.
Take measures to reduce the noise (noise filters, ferrite
cores, etc.). Properly connect the shield wires of I/F
cables. Use twist-paired wires. Separate the signal and
power wires.
Monitor the Z-phase signal using an oscilloscope.
Check that the ground terminal 14 of CN I/F CZ (Z phase
signal open collector output) is connected to the ground
terminal of the controller. Replace the amplifier and
controller, or repair them.
Check that the line amplifier is connected at the both
sides. If the controller does not have a differential
input, use CZ (Z phase signal open collector output).
Causes
Decrease the values of Pr10 (position loop gain) and
Pr11 (velocity loop gain).Change the value of rotary
switch gain.
Increase the value of Pr13 (speed detection filter) until
the sound decreases to an acceptable level, or return the
value to 4 (default).
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Countermeasures
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