Instruction manual

Thermo Scientific Rotary Microtome Microm HM 340 E
Microm International GmbH
part of Thermo Fisher Scientific
Otto-Hahn-Str. 1A
69190 Walldorf / Germany
387831 - English
54
4-3 POSSIBLE SOURCES OF ERRORS – CAUSE AND REMOVAL
Problem
Cause
Removal
Thick-thin-sections
−
Blunt knife/blade.
− Knife angle, therefore,
unfavorable clearance angle.
− Insufficient clamping on
specimen clamping and/or
knife carrier.
−
Move knife and/or insert a new
one.
− Try clearance angle
adjustments, until an optimal
angle can be found.
− Check all screw and clamping
connections on specimen
clamping and knife carrier.
Tighten them, if necessary.
Compressions
−
Blunt knife/blade.
− Specimen too warm.
− Unfavorable clearance angle.
− Cutting speed too high.
−
Move knife and/or insert a new
one.
− Cool specimen.
− Try clearance angle
adjustments until an optimal
angle can be found.
− Turn handwheel slower.
"Chatter" on sections
−
Cutting speed too high.
− Unfavorable clearance angle.
− Insufficient clamping on
specimen clamping and/or
knife carrier.
−
Turn handwheel slower.
− Try clearance angle
adjustments until an optimal
angle can be found.
− Check all screw and clamping
connections on specimen
clamping and knife carrier.
Tighten them, if necessary.
No feed is carried out anymore,
and therefore, no sections are
produced
−
Front end position has been
reached.
− Coarse feed wheel is blocked.
−
Move specimen backwards by
turning the coarse feed wheel.
− Remove blockade on coarse
feed wheel.
Tight handwheel
- partly
- during the entire movement
− Debris and section waste
between microtome and base
plate.
− Dirty link block.
− Remove section waste and
clean microtome.
− Contact a service technician.
Instrument cannot be turned on
−
Power cord not correctly
connected
− Defective main fuse
−
Check power cord
− Check/replace the fuses in the
mains plug unit
Note:
In case of malfunctions and/or service work, please turn off the instrument and contact your
local dealer.