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MDS-D-SVJ3/SPJ3 Series Instruction Manual
4-4 Characteristics improvement
4-4-2 Vibration suppression measures
If vibration (machine resonance) occurs, it can be suppressed by lowering the speed loop gain 1 (VGN1).
However, cutting precision and cycle time will be sacrificed. (Refer to "4-3-2 Speed loop gain".) Thus, try to
maintain the VGN1 as high as possible, and suppress the vibration using the vibration suppression
functions.
If the VGN1 is lowered and adjusted because vibration cannot be sufficiently suppressed with the vibration
suppression functions, adjust the entire gain (including the position loop gain) again.
(Examples of vibration occurrence)
• A fine vibration is felt when the machine is touched, or a groaning sound is heard.
• Vibration or noise occurs during rapid traverse.
If machine resonance occurs, the resonance frequency can be confirmed at AFLT frequency on NC drive
monitor screen. Based on this frequency, the notch filter frequency can be set. When "0" is displayed,
resonance is not occurring.
Suppress the vibration using the vibration suppression functions, and maintain the speed loop gain
(SV005) as high as possible.
POINT