Axis 670 Manual de Instruções descarregar pdf (Página 37)

6.1.7.1.2. Fine Tuning

The purpose of this section is to adjust more carefully the "shoulder" ofthe step response.

Setup the system by performing steps 1,4, and 6 from section

6.1.7.1.1.

above.

Tum on the system power.

Adjust the input signal amplitude and offset so that the scanner now steps from -2.0° to 0.0° in

a square wave fashion and at the same frequency as before.

Adjust the oscilloscope channel monitoring Vp to lOmV/div. The system should now look

like Figure 8.

Note: Since only the coarse tuning has been performed thus far, your waveform may look

slightiy different at this point. However, the same tuning mles still apply.

Tum R28 CCW to bring the first overshoot at the same level as the settled waveform. See

figure 9.

CH2

CHI

CH Imposition Out

CH2=Position In

CH2

Chi

I6mi^

k MB iiftnii/

^. M

I5ms

ixUU/

1.58

Chi ' lamO C MM SftftmV' ^

iS'ms iM\6/ 1.58

CH1=PositionOut

CH2=Posaion In

CH1

Figure 8. Figure 9.

6. Tum R25

to eliminate the first undershoot. See Figure 10.

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Axis 670 Manual de Instruções Página 37