Nikon ECLIPSE E200 Manual De Instrucciones página 66

Adjusting the Torque of the Coarse Focus Knob
2
The tension (torque) of the coarse focus knob
rotation can be adjusted. To increase the tension,
turn the coarse focus knob torque adjustment ring
counterclockwise. The torque adjustment ring is
located at the back of the coarse focus knob. To
decrease the tension, turn the ring clockwise. Do
not decrease the tension too much. If it is too
loose, the stage will fall under its own weight.
Upper Limit Bolt
3
The upper limit bolt is used to prevent the specimen touching the objective when a 40x or
larger-power objective (objectives with a small working distance) is used. Using the upper limit
bolt, the stage does not move up from a certain position. Attach the bolt as follows.
(1) Bring an objective with 40x or larger
power into the optical path. Focus on the
specimen.
(2) Lower the stage to slightly below the
position set in step (1).
(3) Remove the field lens unit.
(4) A hexagonal socket head bolt is located
in the left hole at the lower part of the
focusing mechanism. Remove the bolt
using a supplied hexagonal wrench and
screw it into the right hole.
Note: The upper limit bolt may not work well
depending on the thickness of the specimen
or the microscope itself. The specimen may
touch the 40x objective or the stage may be
stopped by the limit before the specimen
image is in focus. Check that the bolt works
before relying on it.
Chapter 5 Miscellaneous Operations
2 Adjusting the Torque of the Coarse Focus Knob
64
Tightens.
Loosens.
Move the bolt from the
left to the right hole.