Metalfab Better-Weigh Feeders - Manual (Page 2)

Better-Weigh _ Feeders
Installation and Operating Instructions
Metalfab, Inc. Vernon, NJ 07462 Phone (973)764-2000 Fax (973)764-0272 [email protected]
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Note: There should be no rigid connections between earth and the Better-Weigh® feeder scale platform.
MAINTENANCE
Our standard Better-Weigh ® Feeders are supplied with
metering screws having a standard agitator/conditioner.
Their purpose is to provide a constant supply of
densified product to the metering screw.
Standard machines use a "CinchSeal" rear seal. This is
a Mechanical Seal.
It is made up of an elastomer insert, which is held on the
drive shaft by a spring steel compression ring and
rotates with the shaft while pressing the two rotors
against both end plates.
There should be no product leakage. If there is, remove
the threaded plug on the side of spacer blocks and using
a screwdriver, tighten the compression ring in _ turn
increments.
If the seal is hot to the touch, loosen the compression
ring.
As a rule of thumb, the compression ring should
only be "three fingers tight".
All of the gearboxes are shipped with oil unless
otherwise specified. It's recommend that after the first
500 hours or 4 weeks of operation, and after each
succeeding 2500 hours of operation or every 6 months
thereafter (which ever occurs first) drain the oil, flush out
the case and refill to proper level using the
recommended oil or equivalent.
For normal operating conditions where the surrounding
temperatures are within the limits of 50° F to 120° F, use
AGMA Lubricant #8 COMP, 8EP or similar oil of equal
viscosity and composition. Below 50° F, use an AGMA
Lubricant #7 COMP, 7EP or equal.
The approximate oil capacities of the 2100 gearbox is 18
and the 2400 gearbox is 21 ounces.
As with our other DB1 volumetric feeder models, the
Better-Weigh® feeder is normally supplied with a 1 HP
DC shunt wound (having two fields in series) DC TEFC
motor. When using a SCR DC control having a
230/1/60 VAC input, the motor must be configured for
180 VDC Armature and 200 VDC connections. When
using a SCR DC control having 115 VAC input, the
motor must be configured for 90 VDC Armature and 100
VDC connections.
The motor’s wiring is terminated in a separate NEMA 4
enclosure mounted on the feeder base. When
connecting the motor, follow the schematic supplied in
the enclosure.
The Better-Weigh® feeder’s load cell is sized for each
application. As with the drive, the load cell connections
are terminated in the same NEMA 4 enclosure. Follow
the load cell instructions on the schematic supplied in
the enclosure.
. FEEDER DISASSEMBLY
To remove the screw; first remove the guard, loosen the
packing box’s compression ring and hollow shaft
gearbox’s setscrews. Unbolt the tube from the feeder’s
trough and remove the tube followed by the screw. The gearbox, packing box, trough, hopper and cover can
be removed by unbolting the individual items.
FEEDER ASSEMBLY
The original packing box and tube gaskets can be
reused. We recommend that the trough and hopper
gaskets be inspected and replaced if required. If the
screw and tube were the only items removed, simply
reverse the disassembly instructions listed above.
If the Better-Weigh Feeder is completely disassembled,
the following applies. The trough, packing box and
gearbox should be loosely bolted in place. Insert the
screw through the trough,
packing box and gearbox. Bolt the tube into place and
tighten the hollow shaft gearbox setscrews.
Line up the gearbox, screw and trough and tighten the
bolts holding the trough to the weigh deck. Turn the
screw by hand and check for interference and alignment.
The gearbox and packing box can be tightened at this
time.