Manual Z Motor Control; Range Check; Automated Tip Approach - AFM Workshop TT-AFM User Manual

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3.2.1.5. Manual Z Motor Control
The Z motor, which raises and lowers the LL-AFM sensor
up and down, is activated with this window. The speed of
the motion can be controlled with the speed slider. When
the "Up" and "Down" buttons are held down, the motor
slews. The motor is jogged by touching the "Up" and
"Down" buttons.
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Caution: Before activating the "Range Check"
function make sure that the probe is moved
away from the sample surface. If the probe is
too close to the surface, the probe may be
broken.
3.2.1.6. Range Check
The usable range of the piezoelectric scanner is measured
with the "Range Check" option. When "Started," the
piezoelectric scanner is moved in a square motion which
can be readily observed with the video optical microscope.
Caution: Always visually monitor the position of
the Z motor. The Z motor can drive the
cantilever into the xyz piezoelectric scanner
and damage both the probe holder and the
scanner.
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3.2.1.7. Automated Tip Approach
The "Automated Tip Approach" button starts the process of
the probe moving toward the surface. A woodpecker motion
is used, which results in noticeable clicking sounds from the
microscope stage. This sound is from two sources: the
stepper motor being energized and the Z piezoelectric
ceramic being retracted.
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