Specimen Coarse Feed - Thermo Scientific Microm HM340E Benutzerhandbuch

Operating Instructions
Display and Key Functions

Specimen Coarse Feed

30 Operation Manual HM340E
After changing the specimen or moving the knife or knife carrier, it is
necessary to adjust the specimen to the knife edge again. This can easily
be done by means of the specimen coarse feed and the defined trim-
ming values.
For fast forward and backward moves between specimen and knife edge,
the microtome has a motorized coarse feed system.
• The specimen holder is moved to the front as long as knob [B] for
activating the coarse feed forward.
The feed speed is controlled by the turn angle. When knob [B] is only
slightly turned forwards, the speed is slow. The speed will increase by
turning knob [B] fur ther towards the front.
• To move the specimen holder backwards, turn the knob [B] back-
wards, i.e. in the opposite direction of the user.
Turn angle increase will cause higher return speed.
If knob [B] is kept at a high speed for more than two seconds, the speci-
men will automatically move to the rear position.
Automatic return movement can be stopped by briefly turning knob [B]
in the opposite direction.
The coarse feed motor turns off after having reached the back end position.
When the specimen orientation is in the front end position, the red
LED arrow (pointing downward) on the operating panel lights up.
When the specimen orientation is in the back end position, the red
LED arrow (showing upward) on the operating panel lights up.
Press the knob [B] to release trim feed with the selected value, even if
the fine mode is active.
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