12
A16.1065
3.5
Focusing on the Specimens
3.5.1
Focus knob
To adjust the focus
，
rotate the focus knobs on
the right and left sides of the microscope to
move the objective up and down.
The figure to the right illustrates the
relationship between the rotational direction
of the focus knobs and the vertical notion of
the objective.
Focus travel: from the focal point, up to 7mm
and down to 1.5mm, and the limit can be up
to 18.5mm. (As the right figure, spin out the
limit screw for about 4 mm trip to limit)
The traveling distance of the objective for
each knob is as follows:
Rotation of knob
Distance traveled
by objective
Fine focus knob
:
1 rotation
0.2 mm
Coarse focus knob
:
1 rotation
37.7 mm
CAUTION
Never attempt the following operations, as
they might result in product malfunction:
◆
Rotating the left and right focus knobs in
opposite directions.
◆
Rotating the coarse and fine focus knobs
past their limit.
3.5.2
Focus knob tight adjustment
The focus knob become tighter, when
rotating direction of the tightness adjustment
knob is shown as figure 8. Otherwise become
more relaxed
Tightness adjustment knob
Coarse focus knob
Fine focus knob
limit screw
