Yaskawa Sigma-5 User Manual: Operation of Digital Operator - Manual (Page 121)

3.2 Operations
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Utility Function Mode
3.2.31 Vibration Suppression Function (Fn205)
This function suppresses transitional vibration at frequency as low as 1 to 100 Hz that
is generated mainly when positioning if the machine stand vibrates.
This function is set automatically when advanced autotuning or advanced autotuning
by reference is executed. In most cases, this function is not necessary. Use this func-
tion only if fine-tuning is required or readjustment is required as a result of a failure
to detect vibration.
Perform one-parameter tuning (Fn203) if required to increase the responsiveness
after performing this function.
CAUTION
• If this function is executed, related parameters will be set automatically. There-
fore, there will be a large response change after this function is enabled or dis-
abled. Enable the function in a state where the machine can come to an
emergency stop at any time to ensure the safety operation of the machine.
• Be sure to set a suitable value for the moment of inertia ratio (Pn103) using
advanced autotuning before executing the vibration suppression function. If the
setting greatly differs from the actual moment of inertia ratio, normal control of the
SERVOPACK may not be possible, and vibration may result.
• Phase control of the MP2000 Series may not be possible, if the vibration suppres-
sion function is performed when using the MP2000 Series with phase control.
• This function detects vibration frequency between 1 to 100
Hz. Vibration will not be detected for frequencies outside of
this range, and instead, “F-----” will be displayed.
• Frequency detection will not be performed if no vibration
results from position error or the vibration frequencies are
outside the range of detectable frequencies. If so, use a
device, such as a displacement sensor or vibration sensor,
to measure the vibration frequency.
• If vibration frequencies automatically detected are not sup-
pressed, the actual frequency and the detected frequency
may differ. Fine-tune the detected frequency if necessary.