Leica Biosystems SM2500 - Manual (Page 47)

47 Leica SM2500
5. Operation
5.5.8 Mounting knife holder A
Knife holder A consists of 3 components:
Two clamping blocks that hold the knife holder
on the microtome bearing blocks and the knife
holder itself.
•
Preassemble the three components prior to
mounting them onto the microtome:
Slide the clamping blocks (1, 2) onto the pins
(3) of the knife holder.
Block 1 (bearing the clearance angle scale)
must be on the left, block (2) on the right.
The slot in each clamping block must point
backwards.
Secure the knife holder with slotted screws (4).
The bearing blocks of the microtome
supporting the knife holder must be
clean. - Clean them, if necessary.
Place the preassembled knife holder
onto the bearing blocks from above.
Do not slide the knife holder onto the
bearing blocks to prevent the bearing
surface from getting scratched.
• Place the knife holder onto the bearing blocks.
The pin on the underside of each clamping block
must be fit into the bore in each bearing block.
The knife holder is secured with a total of 8
clamping screws: each clamping block is held
down by two front (5) and two rear screws (6).
•
With an Allen key, size 8, lightly tighten all 8
clamping screws (tighten them alternately to
prevent misalignment).
• Next, the 4 rear screws (6) have to be loos-
ened again.
Tightening first all 8 screws followed
by releasing the 4 rear screws is im-
portant to prevent the knife holder
from being misaligned!
6
6
5
5
3
3
4
4
1
2
7
8
Fig. 54