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Prime
is known in the can industry for its Double
End & Missing Tab Detector. The
detector is used in a Easy Open
End converting press
This
is a punch press that converts a raw can end
(shell) by forming the center rivet
post, scores the opening, applies and captures
a pull-tab at approximately 700 per minute.
Our
contribution to the process is detection equipment
that inspects the shell for doubles at the
infeed with one set of sensors and verifies
that the tab is present at the discharge of
the machine with another set of sensors.
Until
1994, each new machine position (infeed or
discharge) required a set of probes and one
detector. The early detectors were Models
DS33, DS35, DS37 and DS38.
All
of these Models function the same but have
different input capabilities. Models DS33
and DS35 detect aluminum ends and tabs. The
Models DS37 and DS38 are used in steel end
conversion. The above pair combinations define
the metal they detect best.
In
addition, the combinations of Models DS33/DS37
and the DS35/DS38 define the required power
source. The DS33 and the DS37 require 120
Vac as a power source. The Model DS37 and
DS38 accepts 24 Vdc. This is strictly a preference
of the machine manufacture.
In
1994 we developed a new detector capable of
performing the double end detection and the
missing tab detection in one control chassis.
It is our Model SD200
Shell and Tab Detector.
We determined that the SD200 needed only 24
Vdc for a power source with the proliferation
of 24 Vdc power supplies for other machine
controls.
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The
SD200 detects aluminum or steel ends.
You can review the superior features
over the older Models by jumping to
the SD200
page. A few of these improvements
include longer cable length between
detector and probes. Each channel
has an alphanumeric display which
provides information on signal strength,
reject threshold value, probe condition
and fault codes.
A conversion press may have 1, 2,
3, 4 or more converting lanes. All
are capable of converting shell to
pull tabs.
Therefore,
one SD200 has a set of sensors on
the infeed of a lane and a set on
the discharge of the lane. With three
lanes there are 3 Model SD200, 6 sets
of sensors. In the dual probe configuration
there are 12 probes or sensors. The
words probe and sensor mean the same.
In some cases it makes sense to wire
a machine with a single unit for the
infeed of the machine for two or more
lanes with one detector. We developed
the Model SD202
for 2 channel of Double Shell Detection
and the Model SD203
and Dual Channel Missing Tab Detector.
They are all basically the same
with the exception of the logic
conditioning. Therefore, a two lane
machine may consist of two Model SD200
or one Model SD202 and one Model SD203.
The results are the same.
Looking
for Missing Tab detection in a conveyor?
Look at our Model
SD205.
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