Troubleshooting
6-3
Part
E
2012 Nordson Corporation
Corrective Action
Possible Cause
Problem
Powder in feed
hopper not fluidizing,
or clouds of powder
erupting from surface
Fluidizing air pressure too low or
too high
Increase the fluidizing air pressure
until the powder is gently boiling.
Decrease the pressure if clouds of
powder are erupting from the surface.
Moist or oil-contaminated powder
Check the air supply for water or oil.
Check the filters, separators, and air
dryer. Replace the powder in the feed
source if it is contaminated. Refer to
the next possible cause.
Fluidizing plate gasket leaking, or
fluidizing plate plugged, cracked,
or installed incorrectly
Check for air leaks around the
fluidizing plate gasket. If leaks are
found, replace the gasket.
Inspect the fluidizing plate for stains,
discoloration, polished surfaces, or
cracks. Replace it if it is
contaminated, plugged, or damaged.
The plate should be installed with the
smooth surface up (in contact with
the powder).
Incorrect ratio of reclaimed to virgin
powder
Increase or decrease the transfer
rate. The powder supply should be no
more than three parts reclaim-to-one
part virgin powder.
Uneven distribution of powder in
feed source
Check the powder and the fluidizing
plate for contamination as previously
described.
Continued...
