Action technology A3 - Vibration and Sound

95
Speed and position command is not steady.
Use [Waveform monitor] in HCX-SETUP to check the motor command
input. And check the contact of cables and connectors.
Misadjustment
Adjust the parameters.
The motor rotate without host command input.
Set the appropriate values for No.33.0 「Pulse train command - Input filter
selection」in position control mode.
Adjust parameter No.60.0 「Analog speed command - Fixed offset value」
in speed control mode.
Adjust parameter No.300.0 「Analog torque command Fixed offset value」
in torque control mode.
Command is interfered.
The shielded twisted-pair cable is used for I/O cable in a vulnerable
environment. So is the encoder cable. The encoder cable should be 20m
or less.
Position deviation occurs.
Set the appropriate values for No.33.0 「Pulse train command - Input filter
selection」in position control/pulse train command mode. Check whether
the pulse output of host control device (such as PLC) is beyond the limit
value. Check whether the product of ①No.33(Pulse command
input(position) and host control device output, ②No.65(Position
command) and No.67(Position feedback), ③No.67 and parameter
No.276.0/278.0(Encoder pulse output division and multiplication) is
consistent with the position feedback of host control device. If inconsistent,
it may be interfered. Then connect FG correctly and adjust parameter
No.33.0.
Please use shielded twisted-pair for I/O cable.
Deviation occurs when home position reset.
Check the command input of host control device. Observe the waveform of
pulse train command input(position) or analog speed command input in
HCX-SETUP to check whether the input command is correct or not. Check
whether to get the Z-phase correctly from the host control device. If the
Z-phase pulse amplitude is small, adjust No.276.0 and 278.0 「Encoder
output division and multiplication」to increase the pulse amplitude.
■Troubleshooting 5(Vibration and sound)
Vibration and sound occurs when the motor operates.
Table 6.3.5
Cause
What to do
Large gain
Adjust the gain.
The machine or devices loosen.
Check the installment of motor, reducer and coupling.
Interference occurs.
Check the cables’ length and shielding.
The high-voltage cable(motor power cable) should be isolated from the
signal cable (encoder cable).
Resonance occurs between motor and device.
Adjust position command smoothing filter at low-vibration; Adjust low-pass
filter or notch filter at high-vibration.
The drive and motor do not match.
Confirm the motor model code in HCX-SETUP [Communication setting]. If