Leica Biosystems RM2235 - Manual (Page 68)

66 Instructions for Use V 1.8 RevC – 09/2013
Problem Possible cause Corrective action
4. Noises during sectioning
The knife "sings" when section-
ing hard specimens. The sec-
tions show scratches or chatter
marks.
• The sectioning speed is too fast.
• The clearance angle is too wide.
• Insufficient clamping of speci-
men and/or knife holder.
• Turn the handwheel at a slower
speed.
• Systematically decrease the
clearance angle until the opti-
mum adjustment is obtained.
• Check all screw and clamp con-
nections on the specimen holder
system and the knife holder. If
necessary, tighten the levers and
screws.
7.2 Instrument malfunctions
1. There is no further feed motion
and thus no sectioning.
• The front end position has been
reached.
• Run the specimen back by turn-
ing the coarse driving wheel.
2. High blade consumption • Too great of a sectioning force
was applied.
• Adjust the sectioning speed and/
or section thickness when trim-
ming. Select a smaller section
thickness, rotate the handwheel
more slowly.
7. Troubleshooting