© ICSPI Corp. 2007-2021
nGauge AFM User Manual 2.0
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In the screenshot below, the peak of the amplitude curve is about 2.5 V.
If there is a peak, but it is above 3.3 V or below 2 V, click on
Show Advanced Controls
and
adjust the
Cantilever Drive Amplitude
. The default value is 35%. Adjust the value and click on
Sweep
again. Continue adjusting the value and clicking on sweep until the peak is between 2
and 3.3 V.
Once you are satisfied with the frequency sweep, click on the
Approach
tab.
If your sweep is noisy (not smooth) or you encounter an error, refer to Section 7.2 Sweep
Troubleshooting.
5.4.2.
Resistance Check
When the Sweep button is clicked, the resistances of the MEMS scanners of the AFM chip are
checked. There are five scanners on the AFM chip: X1, X2, Y1, Y2 and Z.
A high or low resistance value indicates that there may be a problem with the actuator, such as
poor electrical contact (thumb nut is not tight enough or dust is interfering) or a physically
damaged scanner.
An error message stating “Broken device or no device detected” will be displayed if a high or
low resistance value is detected. If you observe this error, try tightening the thumb nut and
clicking on Sweep again. If you continue to encounter the error, refer to 7.2.1 Broken device or
device not found error for more information.
5.4.3.
Advanced Controls
Refer to Section 8.1 Sweep Advanced Controls for more information on advanced controls for
the Sweep page.
