NT-MDT Solver Next - Selecting the Scan Area (Pinpoint System ); 7 Performing Measurements; Contact Afm; Constant Force Mode

Chapter 7. Performing Measurements
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7. Performing Measurements
7.1. Contact AFM
7.1.1. Constant Force Mode
Operations performed in measurements of surface topography with the Constant Force
Mode have much in common with those of other contact techniques, including the Lateral
Force Mode, the Spreading Resistance Imaging Mode, the Force Modulation Mode, and
the Contact Error Mode.
Initial state
The following steps are assumed to be done:
● Launching the control program;
● Turning the instrument on;
● Installing the probe;
● Adjusting the cantilever deflection detection system;
● Mounting the sample;
● Moving the measuring head to its working position;
● Initial approach;
● Selecting the scan area.
For details on these operations see Ch. 6 “Preparing for Measurements” on p. 29.
Procedural Sequence
Measurement in the Constant Force mode is arranged in the following procedural
sequence:
1. Adjusting the Controller Configuration (see i. 7.1.1.1 on p. 56).
2. Adjusting Initial Level of the DFL Signal (see i. 7.1.1.1 on p. 56).
3. Approaching the Sample to the Probe (7.1.1.2 on p. 56).
4. Adjusting Working Level of the Feedback Gain (7.1.1.3 on p. 58).
5. Adjusting Scanning Parameters (see i. 7.1.1.4 on p. 60).
6. Scanning (see i. 7.1.1.5 on p. 62).
7. Saving Measurement Data (see i 7.1.1.6 on p. 66).
8. Completing Measurements (see i 7.1.1.7 on p. 70).
These procedures are explained below.