Head, Probe, & Sample Preparation
Rev. C Dimension 3100 Manual 7-123
Basic AFM Operation continued...
7.3.7 Replace the Dimension SPM Head
1. Carefully slide the Dimension SPM head down into the dovetail
groove of the Z-stage SPM.
2. Loosen the screw located on the right side of the Dimension SPM
head dovetail to lock the head in place (See Figure 7.3d).
3. Verify that sufficient clearance exists between the sample and tip to
prevent the tip and head scanner from crashing into the stage or
sample upon engaging.
4. If it appears the Dimension SPM head may crash once fully
inserted, remove the Dimension SPM head and execute the Motor /
Withdraw command several times.
7.3.8 Connect the Dimension Head
Insert the Dimension SPM head black 21-pin connector plug into the socket
just behind the Z-stage located on the stage control electronics box (See
Figure 7.3d).
7.3.9 Align Laser
ATTENTION: Turn down the illuminator intensity before proceeding with
laser alignment.
For both Tapping Mode and Contact Mode AFM, the user aligns the laser by
moving the laser beam relative to the cantilever while observing the laser
spot on the granite surface (a piece of white paper also works well) below
the Dimension head. If the laser is not on the cantilever substrate, the laser
appears as a bright red spot on the surface below. When the laser is aligned
on the cantilever, a shadow appears on the surface below.
Figure 7.3e displays the laser control knobs located on the top of the
Dimension head. There is a diagram printed on top of the Dimension head
illustrating which direction the laser moves when turning the laser control
knobs counter-clockwise.
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