JEOL JSPM-5200 Instructions Manual page 233

５ MEASUREMENT OPERATION
Friction Force Calib
Perform cantilever calibration for calculating friction force from th
c antilever.
The friction force is calculated based on the following equatio
• Ap
ply
When the Apply check box is
friction-force value calculated from the applied voltage.
• Sp
ring Constant k [N/rad]
Enter the spring constant of the cantilever in the torsional direction
Constant k [N/rad] input box.
• Sensitivity a [mm/V]
This value depends up
the X-axis), then calibrate the sensitivity using the FFM value shown on the AFM
AMP indicator.
This figure is for JSPM − 5200. X and Y shift 0.5 and 0.25 mm per evolution, respectively.
5-170
ration
F
t
h
where G is the modulus of rigidity for w>>t. When the material of the cantile-
ver is silicon, G=5 × 10
10
on the instrument used. Change the photodiode position (in
Y-axis+
X-axis+
Y-axis −
−
( )
ka V V
= ×
9
0 10 [ nN
2 d
checked, the friction-force image appears with a
wt G
3
=
k
+
3 l ( h t ) 2
W
l
[N/m 2 ].
X-axis position
adjusting knob
X-axis −
Y-axis position
adjusting knob
e torsion of the
n:
]
in the Spring
Cantilever
Board
Tip
TMPM5200-2