Unlike the batch loss-of-weight feeders, the continuous
weighers deliver an ongoing rate of material. The loss-of-weight
of material per time is constantly monitored in order to
maintain a continuous loss-of-weight with an accuracy of
+/- 0.25 to 0.5%.
The metalfab continuous controller is used to control the
speed of our "BETTER-WEIGH"® feeders based
on the amount of material weight loss within a given time
period.
1. The rate targets are entered through the front panel
or can be down loaded to the indicator using RS-232, optional
RS-485 or Allen Bradley Blue Hose communications.
2. After our "BETTER-WEIGH"® continuous controller
has been installed, load cell and automatic rate calibrations
are performed. The Proportion, Integral and Derivative factors
are automatically calculated and stored in the indicator.
This eliminates the trial and error methods used by other
manufacturers.
3. Operation of the control can be manual, continuous or
continuous batching. In all modes of operation, the indicator
monitors material gross weight and initiates automatic refills
with high and low level alarms.
4. The feed rate can be set for lbs./sec., lbs./min. or
lbs./hr. A rate tolerance input is used to provide a band
for monitoring the indicator's performance. If the rate
is operating out of tolerance for a set time, the indicator
will output an alarm and can be programmed to automatically
shut down the feeder.
5. The indicator uses vibration elimination to remove noise
from the raw digital data used for weigh indication. The
sensitivity can be preset to eliminate noise from machines,
motors or vibrators.
6. As with our batch feeder control, both the SCR DC drive
and weigh indicator are mounted in the same NEMA 4 enclosure
having a power on/off switch with light and indicator keypad
and display.
| "BETTER-WEIGH"®
MODULAR DESIGN |
"BETTER-WEIGH"®
batch or continuous feeders are available in a modular design,
which allows for quick removal of the hopper/trough assembly
along with the screw and tube. Tools are not required for
cleaning or replacement of a spare assembly. All that is
required is the removal of two side panels and the front
panel. The next step is to disconnect the hand clamps located
adjacent to the rear coupling. Simply pull the hopper/trough
assembly with the screw and tube forward until they are
removed from the unit.
The modular design, model BWM, is available with either
a platform scale or a lever balance system and can be supplied
with a 5 or 2 cubic foot hopper. The modular design is also
available as a volumetric screw feeder.
 |
MODEL |
Feed
Rt.
(cu/ft/hr) |
"OD"
Dim |
"L"
Dim |
"A"
Dim |
BWM-1 |
3 |
1
1/2 |
8 |
2
3/4 |
BWM-1
1/2 |
8 |
2 |
8 |
2
3/4 |
BWM-2 |
20 |
2
1/2 |
8 |
2
3/4 |
BWM-3 |
60 |
3
1/2 |
12 |
3
1/4 |
Hopper
Size |
"C"
Dim |
"D"
Dim |
"E"
Dim |
"F"
Dim |
"H"
Dim |
2
CU FT |
20 |
28 |
8 |
22 |
34 |
5
CU FT |
26 |
28 |
24 |
27 |
41 |
|
| |
|
