Leica CM1860 Instructions For Use Manual page 58

8. Troubleshooting
Problem
Sections not properly flattened
despite correct temperature and
correctly aligned anti-roll plate
Sections curl on the anti-roll plate
Scraping noise during sectioning
and specimen return movement
Uneven sections
Chatter during sectioning
58
Cause
- Knife/blade and/or anti-roll plate
dirty.
- Edge of anti-roll plate damaged.
- Blunt knife/blade.
- Anti-roll plate does not protrude
far enough beyond the cutting
edge.
- Anti-roll plate protrudes too far
beyond the cutting edge and is
scraping against the specimen.
- Knife/blade damaged.
- Edge of anti-roll plate damaged.
- Specimen insufficiently frozen
onto the specimen disc.
- Specimen disc not clamped
tightly.
- Specimen holder ball joint not
clamped.
- Knife/blade not clamped tightly
enough.
- Specimen has detached from the
disc.
- Very hard, inhomogeneous speci-
men.
- Blunt knife/blade.
- Knife profile inappropriate for this
specimen used.
- Incorrect clearance angle.
Remedy
- Clean with dry cloth or brush.
- Replace plate.
- Use different part of the cut-
ting edge or replace.
- Readjust correctly.
- Readjust correctly.
- Use different part of the cut-
ting edge or replace.
- Replace plate.
- Refreeze specimen onto the
disc.
- Check specimen disc clamp-
ing.
- Check ball joint clamping.
- Check knife/blade clamping.
- Refreeze specimen onto the
disc.
- Decrease section thickness;
reduce specimen surface
area if necessary.
- Use different part of the cut-
ting edge or replace.
- Use knife with different pro-
file.
- Slightly decrease clearance
angle.
Instructions for Use V 1.6 RevI – 10/2016