15
CX43
3
Using the pre-focusing lever
The pre-focusing lever prevents the specimen from being damaged by
collision between the specimen and objective.
After bringing the specimen into focus with the high magnification
objective, rotate the pre-focusing lever
a
in the arrow direction until
it stops.
To provide a certain margin for focusing range, rotate the pre-focusing
lever
a
by about half turn in the direction opposite to the arrow
direction from the stopped position.
1
2
If the pre-focusing lever is not positioned appropriately,
the stage may not rise and the specimen may not be
focused. In this case, adjust the pre-focusing lever
position again.
It is recommended to use the pre-focusing lever to prevent the
specimen from damage, but if you do not use the pre-focusing
lever, rotate the pre-focusing lever in the direction opposite to
the arrow direction until it stops.
The tension of the coarse focusing knob can be adjusted.
Insert a commercially-available flathead screwdriver into the groove
c
of
the tension adjustment ring. Rotating it clockwise (arrow direction) increases
the tension and counterclockwise decreases the tension of the coarse
focusing knob
a
.
If the stage descends by its own weight or the focus obtained
with the fine focusing knob
b
is lost soon, the tension is set
too loose. In this case, rotate the tension adjustment ring in the
arrow direction to increase the tension.
2
Adjusting the tension of the coarse focusing knob
c
b
a
a
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