Leica RM2245 Instruction Manual page 29

Directional fixture for specimen clamps
In the quick clamping device of the directional specimen holder fixture, all specimen clamps
available as optional accessories can be used (implemented).
The object orientation allows for simple position
correction of the specimen surface when the
specimen is clamped into place.
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Display of the zero position
For better display of the zero position, the orien-
tation has two red indicators (32).
When both indicators are visible and both set-
screws are in zero position at the same time
(notch point, white mark at " "), the specimen
is in zero position.
When the large standard specimen
clamp (50 x 55 mm) is used, the speci-
men orientation of 8° in north-south di-
rection is no longer possible.
The usable angle is only about
4° in this case.
Leica RM2245
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30
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Fig. 19
The directional specimen holder fixture may be
exchanged for a non-directional fixture (option-
al accessory).
Orienting the specimen
Specimen blocks must not be oriented
during the retraction phase!
If a block is oriented during retraction,
the block will advance by the retraction
value PLUS the selected section thick-
ness before the next section.
This may cause damage to both
specimen and knife!
• Raise the specimen head to the upper end
position and activate the handwheel lock.
• To release the clamp, turn the eccentric
lever (29) forwards.
• Turn setscrew (30) to orient the specimen in
north-south direction. Turn setscrew (31) to
orient the specimen in east-west direction.
Each complete turn of the screw inclines the
specimen by 2°. A total of 4 complete turns =
8° are possible in every direction. The accu-
racy is approximately ± 0.5°.
For ease of estimation, there is a white mark
on the handle and a notch point that is
noticeable during turning.
• To lock the current orientation, turn the
eccentric lever (29) backwards.
5. Operation
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