A
note about
Static Electricity |
EMI’s standard weigh scale control system employs
special circuitry to minimize interference from static electricity.
Among the several brands of weigh scale systems available,
we have found this system to be superior in operation at
typical plastic processing plants. Some molders add an ionizing
unit to further reduce interference, particularly when molding
nylons and styrenes. An additional benefit to using an ionizer
is reducing dust and dirt attraction to parts.
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Automated
Container Filling Systems
Cycle Count l Weigh
Scale l Weigh Hopper l In
Line l Side by Side
Over Under l Turntable l Bagfilling l Trunkline l Tote
Dispenser l Portable l Robotic
Weigh
Scale Automation Systems |
| A weigh scale
system is an excellent choice when a high degree of accuracy
is required. Many molders choose a weigh scale system when small
parts need to be packed into shipping or storage containers,
because it minimizes the chances of too few parts being packed
because of machine failure, bad shots, etc. |
|
 Automated
weigh scale systems such as this, are sized to meet your
container and floor space requirements. Systems include selected
EMI
under press and beside press conveyors (one with a weigh scale
and photo-eye) and a customized control system. |
Sequence of Operation
- The
empty box is conveyed onto the scale and positioned by
photo-eye.
- Empty
box tare weight is deducted by the control system.
- Under
press conveyor runs until the preset weight has been conveyed
into
the box.
- At preset
weight signal, the controls:
• momentarily stop the under press conveyor. . .
• start the scale conveyor to move the full box while positioning an empty
one . . .
• repeats the tare deduction and other sequences.
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 Weigh
Scale Conrols:
The
NEMA 1 enclosure includes a weigh scale push button control
and display for the platform. A
cleat-sensing limit switch,
mounted on the empty box holding conveyor, ensures positive
container movement. A photo-eye assures correct positioning.
Also included: on/off switch, manual reset button, programmable
control and interfacing relay.
A
recommended option is the No
Empty Box alarm, with Alarm Condition indicator. |
Simple
Installation:
Once the under press and beside press conveyors are positioned, the system
can be plugged in. Conveyors, weigh scale and photo-eye are pre-wired into
the control system. The under press conveyor plugs into the control system.
The operator then simply enters the desired weight or piece count into
the scale control. |
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