Instruction manual

Force Imaging
Force Calibration Control Panels and Menus
Rev. B MultiMode SPM Instruction Manual 189
Trigger Threshold
This parameter as well as the Trigger Direction and Trigger Mode define the level at which trigger
occurs.
Trigger Direction
The Trigger Directions are defined as follows:
• Positive: Trigger occurs on positive values only (Trigger Threshold must be positive)
• Negative: Trigger occurs on negative values only (Trigger Threshold must be negative)
• Absolute: Sign of Trigger Threshold is ignored (trigger may occur on positive or
negative values).
Start Mode
The Start Mode parameters are defined as follows:
• Calibrate and Step: Normal ramping (no stepping) unless you use Probe > Approach
Single or Approach Continuous .
• Motor Step: Uses the stepper motor to offset ramp instead of the piezo.
End Mode
The End Mode parameters specify the location of the tip when the mode is switched back to Image
mode. Retracted is the typical setting.
Z Step Size
This parameter defines the size of Z step for Step or Motor Step modes. For Step, it the amount to
move the piezo; for Motor Step it is the amount to move the motor.
Auto Start
When Enabled this parameter starts taking force curves upon entering Force Calibrate Mode.
CAUTION: Use caution when using the Extended Mode parameter; you could
damage the tip.