User guide

TROUBLESHOOTING 6-7
UGE047/1003 CSC Servo Knife Cutters
Look in this section when the final product does not meet
standards: has strings, burrs, cracks, or is misshaped.
Symptom
◆ Hairs or strings.
Possible cause
Blade speed is too low.
The blade is too thick.
The blade is wrong for the
application.
Material is building up on
the blade and wiping off on
the cut site.
There are imperfections on
the blade.
A hole or slot in the blade
cut path is causing a
‘cheese grater’ effect.
The extrudate is too cold.
Solution
Increase the blade speed or
decrease the blade cut path
area (blade width)
Excessive blade thickness can
cause frictional heat. Use a
thinner blade.
Change angle of the blade
attack or the blade style to
decrease the cut path area.
Use blade lubrication (water,
etc.) or change lubricants.
Consider a blade wiping sys-
tem.
The cutting edge should not
have grind marks, burrs or
other imperfections. Check the
blade and replace if necessary.
Change blade design.
If the extrudate is too cold, it
can fracture during cutting.
Raise the extrudate's tempera-
ture.
PRODUCT
QUALITY
PROBLEMS