Dings Magnetic Group 2 PULLEY EDDY CURRENT SEPARATOR - Manual (Page 8)

TROUBLESHOOTING
Recommendations to improve the performance of the eddy
current separator:
1) On most units a belt speed of 400 feet per minute
will give optimum separation.
2) If equipped with a variable speed drive and the
belt is set too fast, the material may not be in the
magnetic field long enough over the magnetic
rotor to be affected by the repulsion force. If the belt
is set too slow, the difference in trajectory of the
non-ferrous and non-metallic material will not be
great enough to properly split the two material
streams.
3) Install a longer vibratory feeder. Burdens which
have a high volume of material but little weight
are more difficult to separate. Material such as
auto fluff is very light - normally about 10 pounds
per cubic foot in density. It’s important to provide
enough travel distance on the vibratory feeder to
level out the surges and reduce the overall depth
of the fluff before it reaches the eddy current
separator.
4) Determine whether the nonferrous metal being
missed is truly “recoverable.” The size, type,
and configuration of the nonferrous affects its
ability to be separated:
Nonferrous metal entrapped in nonmetallic
material may be impossible to separate. Small
scraps of aluminum that are embedded or
entrapped in fabric, foam or plastic usually are
not recoverable. And although aluminum cans
are very easy to separate, a full soda can is
not recoverable - the weight of the soda or
nonmetallic material is much greater than
the repelling force affecting the aluminum.
Although aluminum, copper, and die-cast metal
are recoverable with an eddy current separator,
there are other nonferrous metals which are
very difficult or impossible to separate. For
example, although they are nonferrous metals,
stainless steel 302 and 304 are very difficult to
separate. Their high resistance to current flow
usually prevents any significant repelling force
from being developed.
Belt Tracking
If the belt is difficult to track after following
procedures on page 5, check the following:
Are all bearings bolted down tightly to the
frame? Have they moved or shifted?
Are the eddy current pulley and drive pulley at
right angles to the frame?
Is the eddy current frame twisted or bent in
any way?
Has the belt been stretched so that one side is
longer than the other?
If the belt has been replaced, have the ends
been cut square to the edges of the belt prior
to the splice being installed?
Are all the bearings in proper operating condition?
ORDERING PARTS
Replacement belts or other parts can be purchased from the
Dings Co. in Milwaukee. Call 414-672-7830. Please have
nameplate information ready to supply while on the phone.
The nameplate is located on the frame.
4740 W. Electric Avenue, Milwaukee, WI 53219
(414) 672-7830 FAX (414) 672-5354
www.dingsmagnets.com
Printed in the U.S.A.. Bulletin 9000F1
8