Axis 670 Manual de instrucciones descargar pdf (Pagina 56)

load combination,

ringing

may still occur when tuning the scanner. This is especially true

for high Q scanner torsional resonances. The viscous damping coefficient increases as the

scanner

RMS

current (acceleration) increases, shifting the resonant frequency downward

slightly with higher tuning

speeds.

This tends to de-stabilize the system when a fixed

frequency, high Q notch filter is used. Lower

notch filters can counteract this.

e) Adjust the Frequency pot on the NFM until a minimum is obtained in the NFM output

waveform.

f) Now adjust the Depth pot on the NFM to further minimize the output waveform.

g) Repeat steps (e) and (f) until the NFM output waveform at Fr is minimized as much as

possible. At this point, you are done.

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Axis 670 Manual de instrucciones Pagina 56