38
Bedienungsanleitung V 2.3 – 02/2009
The table below shows the most frequent problems that occur when working with the instru-
ment and gives advice for troubleshooting.
7.1 Possible errors
1. Thick/thin sections
Alternately thick and thin sections
are produced. In extreme cases,
every second section is skipped,
being followed by a very thick sec-
tion.
•
Re-clamp blade.
•
Adjust knife holder laterally or use
new blade.
•
Insert new pressure plate or use
new knife holder.
•
Readjust pressure plate.
•
Systematically try wider clearance
angle settings until optimum angle
width has been found.
7.
Troubleshooting
Problem
Corrective action
Possible causes
•
Blade insufficiently clamped.
•
Blunt cutting edge.
•
Pressure plate damaged or not
correctly adjusted.
•
Knife / blade clearance angle too
narrow.
•
Blunt cutting edge.
•
Specimen too warm.
•
Sectioning speed too high.
•
Paraffin has accumulated at rear
pressure plate of knife holder.
7.2 Malfunction
1. No specimen feed, i.e. no more
sections
3. Streak present in sections
with knife holder E
2. Sections compressed
Sections are extremely com-
pressed, wrinkled or jammed to-
gether.
•
Select sectioning speed and/or
trimming thickness according to
specimen hardness. Reduce section
thickness, turn handwheel at slower
speed.
•
Move specimen backwards (coarse
feed wheel).
2. Blades wear out very quickly
•
Remove paraffin debris regularly.
•
Use different zone of cutting edge
or use new blade.
•
Cool specimen prior to sectioning.
•
Work at slower sectioning speed.
•
Specimen cylinder has reached
front limit stop position.
•
Cutting forces too high.
4.
Noise during sectioning
Knife "sings" when sectioning hard
specimens. Sections shows
scratches and chatter marks.
•
Sectioning speed too high.
•
Clearance angle too wide.
•
Insufficient clamping at specimen
and/or knife holder.
•
Turn handwheel at slower speed.
•
Systematically reduce clearance
angle settings until optimum angle
width has been found.
•
Check all screws and clamping
mechanisms at specimen holder
system and knife holder. Retighten,
if necessary.
Summary of Contents for RM2125
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