User guide

Troubleshooting l 6-13
6
Troubleshooting
Product Quality Problems (continued)
Symptom
Cut is not square.
Possible Cause
The extrudate is too cold.
The blade speed is too high.
The bushings are not providing
enough support during cutting.
The cutting blade is too sharp.
If using Nylon, it may be cooling
too quickly.
Solution
Low blade speeds can cause exces-
sive blade interruption. Increase
blade speed or decrease the blade
cut path area.
Check that blade is 90 degrees rela-
tive to the bushing holder.
If the cutter bushings are not proper-
ly gapped, the blade may be free to
move with the extrudate. Check and
adjust if necessary.
See Installation
Section entitled, Mounting Cutter
Bushings and Appendix C.
If the knife bevel is asymmetric, the
blade will tend to move in the direc-
tion of the smaller bevel. Be sure
that the bevel is symmetric. Note:
You can use this to your advantage
with some rigid products.
There must be enough space
between the puller and cutter to
allow for the extrudate to stop dur-
ing cutting.