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Fault
Excessive vibration
Unusual noise
Reduced or no blasting
performance
Escaping abrasive
Abrasive loss on the
surface or escaping
abrasive at the blast
head
7.
Troubleshooting
Possible cause
Blast wheel is worn irregularly. Imbalance
due to worn or broken wheel blades.
Machine fan impeller is worn.
Too little play or poor alignment of the
rotating parts.
Loose and incorrect set screws.
Squeaking wheels.
Seizing motor.
Inadequate abrasive supply to the blast
wheel.
Contaminated abrasive.
Feeding of abrasive shot valve and
abrasive storage hopper.
Blast wheel or control cage.
Adjustment of the shot valve.
"Shocked blast wheel".
At the start of the blast process too much
abrasive at once hits the wheel.
The travel speed is too high.
Poor sealing.
Poor abrasive quality.
Worn blast wheel parts.
Remedy
Replace the worn blast wheel parts and
remove all broken parts from the machine.
Replace the worn fan impeller.
Check alignment of the rotating parts
(blast wheel and control cage).
Check whether all screws and parts are
fixed tightly).
Replace the wheels.
Replace the motor.
Clean wire mesh, top up abrasive if
necessary.
Abrasive is heavily contaminated, check
the ventilation system.
Check and clean blocked shot valve
housing.
Worn blast wheel or control cage, replace
worn parts if necessary.
Check the adjustment of the valve.
Close the shot valve and stop the blast
wheel motor. Start the blast process again
and slowly open the valve.
Reduce the travel speed.
Check all seals and replace if necessary.
Contact your representative.
Replace worn blast wheel parts.
27
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