Nikon Eclipse LV100DA-U Instructions Manual page 49

Coarse focus stopper
The coarse focus stopper restricts the movement of the coarse focus knob so that the stage cannot
be raised higher than the position the operator specifies. When the coarse focus stopper ring is
rotated in the direction of the arrow (labeled "CLAMP →") on the microscope base, the stage
cannot move higher than that position. (This function does not limit the stage movement by the fine
focus knob.)
For example, once the coarse focus knob is clamped in place at the focus position, a rough focus
can be attained the next time simply by raising the stage until the coarse focus knob cannot be
turned any further.
When the coarse focus stopper is not used, be sure to keep the stopper loosened by rotating it in the
opposite direction of the arrow. (Rotate the stopper ring to reach the limit in the direction opposite
from the arrow that is marked on the microscope base.)
Example:
When a specimen is focused, rotate the coarse focus
stopper ring as far as it goes in the direction of the
arrow (labeled "CLAMP →") on the microscope base.
The rotation for tightening is approximately three
quarter turn.
The coarse focus stopper is now clamped in position.
When exchanging specimens, use only the coarse
focus knob to lower the stage.
After the specimen replacement, use only the coarse
focus knob to slowly raise the stage until it hits the
limit. The specimen should be roughly in focus when
the stage has been raised as far as it goes. Use the fine
focus knob to bring the specimen into perfect focus.
III. Operation of Each Part
LCN T
0.8
0.7 Achr N.A
0.6 = 0.9
0.5 0.4 JAPAN
0.3 0.2 0.1
NCB
ND8
F.S.
Coarse focus stopper ring
Clamp
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