AEC Colortronic MTF 3000 Series Granulator - Manual (Page 15)

6.0 Granulator Troubleshooting
6.1 Investigating Causes
1. No granulate
2. Stringy granulate or fines
3. Fines
4. Excessive power required - blown fuses
5. Machine stalls
6. Bearings sound noisy or are hot
7. Belts slip of squeal
8. Motor will not start
9. Granulate builds up in the transition or tubing
10. Feedstock hangs up in the hopper or cutting chamber
6.2 Suggested Actions
1. No granulate
a)
Feedstock may be hung up inside the hopper. Shut the machine down and
check.
b) Screens are plugged. Clean the screens.
c) Fan is too small. Replace with larger unit or fan wheel.
d) Fan line may be clogged. Clean as required.
2. Stringy granulate.
a)
Knife gap is too large. Adjust knives to proper gap specification.
b) Knives are dull. Sharpen or replace knives and re-install.
c) Overloading of feedstock. Reduce the amount of feedstock put into the
machine per unit of time.
3. Fines.
a)
Knives are dull. Sharpen knives and re-install.
b) Plastic is clogging the screens or transition preventing proper fan evacuation.
Shut the machine down and clean.
c) Rotor speed is too fast. Change pulley.
d) Screen size is too small. Change to a screen with larger holes.
4. Excessive power required - blown fuses.
a)
Overloading of the machine. Reduce amount of feedstock put into the
machine per unit of time.
b) Knives are dull. Sharpen or replace knives and re-install.
c) Knife gap is too large. Adjust knives to proper gap specification.
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