17
Operation of Each Part
3
1
Coarse Focus Knob and Fine Focus Knob
1.1
Focus Knob Rotation and the Objective Vertical Movement
The rear side fine focus knob is marked in 1
µ
m
increments.
The objective rises/falls approximately 0.1 mm per one
turn of the fine focus knob.
The objective rises/falls approximately 14 mm per one turn
of the coarse focus knob.
The vertical movable range (coarse/fine focus stroke) of
the objective is 15 mm. It can be risen 13 mm above from
the focal point and can be lowered 2 mm below from the
focal point.
Focus knob rotation and the
objective vertical movement
Never attempt either of the following actions, as they will
damage the microscope.
• Rotating the left and right focus knobs in opposite directions
at the same time.
• Rotating the coarse focus knob past the stopper.
1.2
Adjustment for the Rotation Torque (rotation Resistance) of the Coarse
Focus Knob
The torque of the coarse focus knob can be adjusted.
To increase the torque, rotate the torque adjustment ring
at the base of the rear side coarse focus knob in the
counterclockwise direction. To decrease the torque, rotate
the ring in the clockwise direction.
CAUTION:
If the torque is adjusted very heavy and the
coarse focus knob is rotated, the microscope
may be damaged.
Coarse torque adjustment ring
Decrease the
torque
Increase the
torque
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