Olympus BHTU Manual de instrucciones - Página 15
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E
Focus Adjustment
Fig. 18
f
Adjustment Knobs and
Although the tension of the coarse adjust-
ment knobs has been already adjusted for
optimum performance by the manufacturer.
it is possible to personally adjust the tension
of the coarse adjustment for either heavy or
light movement depending on the operator's
preference by rotating the tension adjust-
ment ring
<D.
(Fig. 181
The ring can be rotated by inserting a screwdriver into one of the holes on the periphery of the
ring. The clockwise rotation (in the direction of the ARROW) tightens the coarse adjustment
knobs. Do not loosen the ring too much, because the stage may drop or the fine adjustment
knobs may slip.
CD
1. Tension of Coarse
Fine Adjustment.
NOTE: Do not rotate the right and left coarse adjustment knobs in the opposite directions
simultaneously. If the stage drops and the specimen goes out of focus. the tension
adjustment ring is too loose. Tighten the ring.
Use of Rubber Cap for Fine Adjustment Knob,
Attaching this cap over the fine adjustment
knob increases the sensitivity of the fine focus-
ing motion.
(The rubber cap is optionally
available.)
2. Pre-Focusing Lever
This lever
ill
is provided to prevent possible
contact between specimen and objective as
well as to simplify coarse focusing. (Fig. 191
The lever is locked after coarse focus has
been accomplished. This prevents further
upward travel of the stage by means of the
coarse adjustment knobs, and automatically
provides a limiting stop if the stage is lowered
and then raised again. The pre-focusing lever
does not restrict fine focusing.
Fig. 19
14