Mechanical Trimming Function; Specimen Retraction - Leica RM 2235 User Manual

5. Operation
Magnet for
holding the
wrench
size 4
22
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

5.1.4 Mechanical trimming function

The RM2235 is fitted with a mechanical trimming function. The
trimming 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
36
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.
The section thickness that has been set is not added to the
Fig. 16
selected trimming value.
If the section thickness that has been set is greater than the
selected trimming value, the section thickness is fed.

5.1.3 Specimen retraction

The specimen retraction serves for protecting
the knife and the specimen. When the retrac-
tion is switched on, the object is drawn back
200 µm into the upper end position after the
sectioning stroke during the return movement.
Before the feed motion of the new section
thickness, 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 sup-
plied with the delivery.
Before switching the specimen retraction On
and Off, run the object head to the upper end
position by turning the handwheel.
Instruction manual V 1.4 – 02/2010