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3-7 Focusing
a
a
1
Focusing
1
Rotate the coarse focusing knob a in arrow direction to move the
objective to the sample as close as possible.
2
While observing the sample through the eyepieces, slowly rotate
the coarse focusing knob a in the direction opposite to the arrow
b
direction to lower the stage.
3
When the sample comes into view, rotate the fine focusing knob b
to bring the sample into focus precisely.
2
Removing the fine focusing knob
The fine focusing knobs are attached on both sides as a factory
default.
NOTE
b
1
Loosen the clamping screw a using the Allen screwdriver to remove
the fine focusing knob b .
a
3
Adjusting the tension of the coarse focusing knob
The tension of the coarse focusing knob can be changed if necessary.
NOTE
Rotating the coarse focusing tension adjustment ring a in the arrow
1
direction increases the tension and in the opposite direction decreases
the tension.
TIP
The fine focusing knob is detachable to prevent your hand
from contacting the fine focusing knob when operating
X-axis knob and Y-axis knob.
Be sure to use the course focusing tension adjustment
ring a to adjust the tension of the coarse focusing knob.
Its tension is adjusted to tight as a factory default in order
to secure the pad for protecting the focusing unit.
If the objective descends by its own weight or the focus
obtained with the fine focusing knob is lost soon, the coarse
focusing tension adjustment ring is set too loose.
In this case, rotate the coarse focusing tension adjustment
ring a in the arrow direction to increase the tension.
GX53
21
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