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Motorized* focusing
!
Attention:
Before using the motor focus, read the
instructions* carefully to eliminate the risk of
damage due to operation errors. If you have an
interchangeable stage, set the clamp (48.9) so
that specimens just touch the front lens of the
higher-power objectives when the vertical
adjustment of the stage is at its highest position.
1.1 Switching on
After you turn on the power supply with the
mains switch (42.14) the display (44.7) will still
show the data set before the microscope was
switched off last time, except for the "coarse
drive" setting on the focusing wheel (44.4),
which is not stored.
If neither the display nor one of the LEDs lights
up, the microscope is probably not properly
connected to the power supply (check mains
cable connections).
Fig. 44 Motor focus controls
Controls 1– 4 are situated on both sides of the stand in the
same layout.
1 Stepwidth, 2 "Up", 3 "Down", 4 Focusing wheel, 5 "Upper
threshold", 6 "Lower threshold", 7 Display
2
1
3 4
58
1.2 Focusing
The position of the stage can be adjusted with
– the focusing wheel (44.4) and
– the "Up" (44.2) and "Down" (44.3) keys.
On some models the interchangeable stage
can also be vertically adjusted with the clamp
(48.9).
These controls are situated on both sides of
the microscope, giving you a choice of left-
or right-handed operation.
1.2.1 Fine and coarse focusing with the
focusing wheel
Like the mechanical coarse and fine focus, the
motor focus also translates a rotary motion of
the focusing wheel into a vertical motion of the
stage. One main difference, however, is that
there is only one focusing wheel.
Instead, the translation from the rotary to the
vertical movement can be effected by keystroke
(see below 1.3).
With the focusing wheel the stage can also be
moved over a set upper threshold (see section
1.4) but a lower threshold setting can only be
overridden by one step.
5
6
7
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