Other Parameters

Peak Force Engage Setpoint

Laser interference from reflective samples can cause a “false engage” which can be avoided by using a large Peak Force Engage Setpoint. This is why a relatively large and conservative Peak Force Engage Setpoint default value is used. But large Peak Force Engage Setpoints can damage samples and probes, particularly cantilevers with high spring constants. To reduce the engage force, reduce the Peak Force Engage Setpoint. When you reduce Peak Force Engage Setpoint, you should also reduce SPM engage step, found in Microscope > Engage Settings > General, shown in Figure 1.

Range or Settings:

• Dimension Icon: 0.001 V–1.229 V (Default value: 0.15 V).
• MultiMode 8: 0.001 V–1.229 V (Default value: 0.15 V).
• BioScope Catalyst: 0.001 V–1.229 V (Default value: 0.3 V).

Figure 1: SPM engage step

Medium

The medium surrounding the sample and probe. This parameter is selected when you select either PeakForce QNM in Air.

Range and Settings:

• Air
• Fluid

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