17
3
．
Coarse and fine focusing
y
For focusing of the instrument please use the coarse and fine focus knobs on the left and right side
of the microscope stand.
y
The direction of vertical movement of the revolving nosepiece corresponds to the turning direction
of the focus knobs.
y
One full rotation of the fine focus knob moves the nosepiece 0.2mm in z-direction. One scale unit
on the fine focus knob equals 2 microns.
Please avoid following action:
y
Never attempt either of the following actions, since doing so will damage the focusing mechanism.
y
Rotate the left or right knob while holding the other.
y
Turning the coarse and fine focus knobs further than their limit.
4. Coarse focus torque adjustment
y
To increase the torque, turn the torque adjustment ring located behind the left-hand coarse focus in
the direction of the arrow. To reduce the torque, turn the ring in the direction opposite.
(Fig.20)
1. Coarse Focus Torque Adjustment Ring 2. Coarse Focus 3. Fine Focus
