Operation; Operating Elements And Their Functions; Section Thickness Setting; Coarse Driving Wheel - Leica RM 2235 User Manual

5.1 Operating elements and their functions

38
33
Leica RM2235
34
Fig. 13
Fig. 14

5.1.1 Section thickness setting

The section thickness is set by turning the ad-
justing knob (33) at the front of the microtome
on the right.
The adjusting knob has a notch for each value
that can be set.
Setting range: 1 - 60 µm
from 1 - 10 µm in 1 µm increments
from 10 - 20 µm in 2 µm increments
from 20 - 60 µm in 5 µm increments.
The section thickness set in each case is
displayed in the window (34).
The selected section thickness (on the scale)
must agree with the red pointer (38)

5.1.2 Coarse driving wheel

The instrument can be ordered with clockwise
or counterclockwise rotation. The given direc-
tion of rotation means "forwards" and relates to
the feed movement of the specimen towards
the knife.
The coarse motion serves for a fast horizontal
forwards movement of the object - towards the
knife - and backwards - away from the knife.
When reaching the rear/front end positions, the
coarse driving wheel can only be turned with
difficulty. In the front end position, no more feed
motion takes place.
The coarse driving wheel also turns
during sectioning. Therefore it must
not block whilst the handwheel is be-
ing turned during sectioning; other-
wise, no feed motion can take place
and thus also no sectioning.

5. Operation

21