Head, Probe, & Sample Preparation
7-130 Dimension 3100 Manual Rev. C
Adjust Photodetector continued...
Figure 7.3j Photodetector Mirror Adjustment Knobs
5. For Contact Mode AFM only, offset the vertical deflection value
to -2 volts using the photodetector adjustment knobs.
7.3.11 Locate Tip
For initial start-up where the Z-stage and optics have been almost fully
retracted, use the Focus Surface command to move the tip closer to the
surface. It is easier to focus on the tip with more light reflecting from the
surface into the optics.
To locate the tip, complete the following steps:
1. Initiate the Locate Tip command in the Stage menu by clicking on
Locate Tip.
Note: This command locates the tip position
(Z height) using optical focal distance
measurements. When this step completes, the
computer records the tip position in memory.
2. Zoom out as far as possible. This helps you locate the cantilever.
(Vertical)
AFM / TM Detector
Mirror Adjustment
(Horizontal)
LFM Detector
Mirror Adjustment
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