4 PREPARATION FOR OBSERVATION
The FFM value cannot be adjusted to 0.
Such a case probably occurs when the cantilever is not set correctly on the cantilever
holder. Check the following four points.
•
Is the cantilever set straight on the cantilever holder ?
•
Is the cantilever inclined in the cantilever groove ?
Such a case occurs mainly when burrs or broken pieces produced when the cantile-
ver is cut out are inserted between the cantilever and the cantilever holder.
Piece of broken cantilever
Cantilever holding bar
Cantilever holder
Cantilever
•
Is the cantilever holder inserted properly (does it touch the innermost wall) ?
Especially in the case of the cantilever holder, its insertion becomes difficult when
the holder gets near the innermost wall due to the electrode on the holder. Be sure
that the holder touches the wall.
•
Is "External" 0 ?
Confirm that the External value of Feedback/Filters Advanced in the Advanced tab
on the SPM Parameters window in the WinSPM software is 0.0 V.
The AFM value cannot be adjusted to zero, or the laser beam reflected by the
cantilever does not illuminate the mirror.
Check the following two points.
•
Is the cantilever inserted properly into the cantilever groove until it touches the
innermost wall of the holder? Or, is there a piece of broken cantilever or something
between the cantilever and the holder ?
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TMPM5200-2