4 mechanical trimming function, 3 specimen retraction, Operation – Leica Biosystems RM2235 User Manual

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Instructions for Use V 1.8 RevC – 09/2013

5. Operation

5.1.3 Specimen retraction

The specimen retraction serves for protecting

the knife and the specimen. When the retrac-

tion is switched on, the specimen is drawn

back 40 µm into the upper end position after the

sectioning stroke during the return movement.

Before the feed motion of the new section thick-

ness, the feed motion for the retraction value

takes place.

The specimen retraction can be switched off

manually at the back of the instrument (Fig. 15), if

required, using the slotted-screwdriver supplied

with the delivery.

Before switching the specimen retraction On

and Off, run the specimen head to the upper end

position by turning the handwheel.

5.1.4 Mechanical trimming function

The RM2235 is fitted with a mechanical trimming function. The trim-

ming lever has 3 notching positions (0, 10 µm, 30 µm).
The points (36) mark the two trimming stages:


= 10 µm



= 30 µm

• For activating the trimming function, press the lever downwards

into one of the two notching positions and keep depressed. After

each rotation of the handwheel, a feed motion of 10 µm or 30 µm

takes place.

• After letting go of the lever, it automatically springs back to its

original position (zero position). The trimming function is thereby

deactivated.

Magnet for

holding the

wrench

size 4

For turning the retraction

Off, turn the slot into the

horizontal position (off).

For turning the retraction

On, turn the slot into the

vertical position (on).

Fig. 15

Fig. 16

The section thickness that has been set is not added to the

selected trimming value.

If the section thickness that has been set is greater than the

selected trimming value, the section thickness is fed.