Scan Setup; Z Feedback - AFM Workshop LS-AFM User Manual

3.2.2.3 Scan Setup

All of the parameters required for scanning are presented in the Scan Setup window. Once
scanning is started, these parameters may not be changed. The parameters are:
1. Type: The scan can be either 2-D, which scans just the x-axis, or 3-D, which scans both
the x- and y-axis.
2. Scan Rate: The rate in Hertz that the
probe is scanned across the surface
(max 2 Hz).
3. Scan Lines: The number of lines in the
y-axis and the number of pixels mea-
sured in the x-axis.
4. Scan Size: The range of the scan,
from 0.1 micron to either 15 or 50
microns (depending on scanner size).
5. Samples/Pixel: The number of data
points signal averaged per pixel while
a scan is being taken.
6. Rotation: A scan can be completed
with 0° or 90° rotation.
7. Center: The center of the scan in x and y coordinates.
8. Current Y/X Position: The position of the probe along the y-axis as a scan is taken at
0°, along the x-axis for a 90° scan.
9. Scan Complete: This indicator turns green when a scan is completed.
10. Zoom Box: This shows the position and size of the scan in a grid. The scan area must
be within the zoom box area.

3.2.2.4 Z Feedback

All of the parameters for maintaining feedback are provided
here. The parameters are:
1. Gain: Scale factor for the feedback control signal.
2. Proportional: Scale factor for the proportional term in the
PID feedback controller.
3. Integral: Scale factor for the integral term in the PID
feedback controller.
Section 3-8
V 1.1 / LS-AFM Users Guide