User Manual Of EL7-EC** AC Servo
235
6.11.2 End vibration suppression
End vibration
Direction
Moving body
Motor
If the mechanical structure has an end that is long and heavy, it might cause end
vibration at emergency stop and affect the positioning. Usually happens on long armed
axis with loose end. The frequency is usually within 100Hz which is lower than
mechanical resonant frequencies. It is called low-frequency resonance which can be
prevented by applying low frequency suppression function.
To apply low frequency suppression
1.
Trace current/ position deviation waveform when motion stops.
2.
Measure the vibration cycle T1 of current waveform.
3.
Convert T1 into low frequency resonance by F1 = 1/T1
4.
Write F1 into Pr2.14
5.
If some other low frequency resonance occurs, please repeat step 1-3 and write F2
into Pr2.16.
Command
velocity
Position deviation
Time
t
T1
