Coarse Focus Stopper Ring - Nikon ECLIPSE L200ND / ECLIPSE L200N Instructions Manual

• Increasing the torque of the coarse focus knobs
To increase the torque, turn the coarse torque adjustment ring counter-clockwise.
• Reducing the torque of the coarse focus knobs
To reduce the torque, turn the coarse torque adjustment ring clockwise, but make sure
that the stage does not fall on its own weight when you take your hands off the coarse
focus knob.

3.2.3 Coarse focus stopper ring

The coarse focus stopper ring is used to mark the vertical position of the stage, mainly the
focal plane. Once the coarse focus stopper ring is clamped at a position, you can easily
bring back the stage to that position even after it is lowered greatly for sample exchange.
The coarse focus stopper ring is at the base of the left side coarse focus knob.
• Marking the stage position
To mark the stage position, turn the ring clockwise to the limit. When the coarse focus
stopper ring is clamped, the stage can no longer be raised up beyond the marked
position by the coarse focus knobs.
Reference:
Use only the coarse focus knob to lower or raise the stage for sample exchange. To
return the stage to the marked position after sample exchange, raise the stage to the
limit using the coarse focus knob.
• Releasing the mark
To release the mark, turn the coarse focus stopper ring counter-clockwise to the limit.
3 Operation of Each Part
The stage position is marked.
Figure-13 Coarse focus stopper ring
Do not excessively tighten the coarse focus stopper ring, otherwise the coarse
focus stopper ring may become difficult to release.
14
IC Inspection Microscope ECLIPSE L200ND / L200N Instructions
Coarse focus
stopper ring