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Chapter 6: Troubleshooting 28 of 37
6-3 Processing Faults
Problem
Possible Cause
Possible Remedy
Stalling
Overfeeding
Reduce feed rate
Partial or complete screen
blockage
Remove screen, clear and
inspect for damage
Insufficient tension on v-belt
drive causing belt slip and
burning
Check tension of the belt and
adjust as necessary
Badly blunted or damaged
knives
Fit re-sharpened or new knives
as required
Knife setting too wide Check clearances given and
adjust as required
Installation fault; motor running
in reverse direction
Check with direction arrow and
re-fit electrical connections to
give the correct direction
Safety switch cut out where
fitted
Tighten safety switch setting
screw
Material overheating
Check all possible causes under
“stalling”
Remedy as shown above
Screen size too small
Increase screen size
When granulating rubber,
insufficient talc causes freshly
cut surfaces to re-adhere
Increase talc percentage rate of
infeed
Blockage in airveyor
Check direction of fan rotation,
check venture and line or chute
for blockage