Optics11 CHIARO NANOINDENTER, Руководство пользователя, Страница: 23 / 65

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The X and Y stages can be controlled in the same way: by entering a value in micrometers in the
‘Travel’ field and subsequently pressing one of the motor control buttons. Additionally, a white field
with a blue dot is displayed, simulating the (theoretical) X-Y movement range and the current
position of the tip with respect to the moving stage. Please note the coarse XYZ-stages in the Piuma
operate in open loop mode and have >95% positioning precision when calibrated correctly.
Alternatively, one can also use the keyboard arrow keys and the arrows keys at the numbering pad
(‘Num Lock’ should be ‘off’) (Figure 18). Arrow keys stage movement can be activated in the
‘Advanced’ tab of the ‘Options’ menu (Figure 19). By clicking the ‘Reset’ button in the lower l eft
corner, the controller box can be reset. In the next window, which automatically will pop up, you can
reset the X, Y and Z stages to their home position by clicking ‘ok’.
3.2 Piezo controls
The Piezo stack that is normally used for indenting can also be controlled manually. By providing a
number in the “Travel” field below the Piezo status bar, the piezo can be commanded to make
relative steps. The range of the Piezo stack is ~20000 nm, and a manual offset can be set anywhere
in this range. In normal operation this feature is not used, however for specific experiments that
require a more precise control of the starting position of the indentation, this feature can be helpful.
3.3 The Find surface procedure
The Piuma Nanoindenter features an automated find-surface approach. This approach uses a
coarse-fine stepping routine, combining the motorized Z stage and the indentation piezo.
To safely and accurately bring the cantilever near to the sample surface using the automated find-
surface routine, the following steps should be taken:
Figure 18: Keyboard stage controls ( X stage , Y stage , Z- up , Z+ down , Stop ).