MAGUIRE Weigh Scale Blender 4088 Installation Operation & Maintenance page 91

On model WSB-940, be sure the weigh bin has two baffles installed. These ensure
horizontal layering (as opposed to side by side layering) of materials prior to dropping into
the mix chamber.
Bulk density and pellet shape differences, specifically smooth virgin pellets mixed with
square higher density color pellets, can separate when dropped onto a sloping pile, as
exists in a hopper, Gaylord, or surge bin. The light round pellets flow like water to the
edges, while the heavier square color pellets stay put. This is difficult to correct. It is best
not to drop these kinds of blends into large containers.
Vacuum conveying can also separate materials of different bulk densities. Maintain high air
velocity to minimize this.
Models WSB-MB series units use an air drive for the mix blade, instead of an electric
motor.
If you are having mix problems with air drives, be sure the blades moves a full 270 degrees
(3/4 turn) with each sweep. If they do not, try the following:
Increase the air pressure. If the gauge pressure drops more then 5 pounds during
operation of the blades, the air supply line is too small.
Lower the pile in the mix chamber to reduce torque requirements on the mix blade. This is
explained above.
Increase the MPO parameter from 122 (1/2 second) to 183 (3/4 second) or 244 (1 full
second). This allows more time for a full mix blade sweep to occur. You may also want to
increase mix time from 10 seconds to 15 or 20 seconds so that, in spite of slower mix blade
speed, the same amount of mixing occurs.
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