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| Reduced Wiring |
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 Components
on a production line are conveyed in trays past
an array of fiber-optic sensors.
There are many production lines where, as illustrated
here, components, batteries, etc. are conveyed
past an array of fiber-optic sensors that detect
the presence or absence of a tray's contents as
part of the manufacturing or inspection process.
Efficient wiring for this sort of application
is enabled by the HPX-ET, as it is possible to
connect the output of the entire array to a control
board etc. using the single connector and cable.
Also, if remote units are used, the length of
the fiber-optic cables can be reduced by placing
each amp close to the point of detection. At the
same time, the master unit can be placed where
it will be easy for an operator to make fine adjustments.
Moreover, if it is necessary to install additional
fiber-optic photoelectric sensors, the individual
units are easily added thanks to the slide connector
on the gang mount and then you need only install
the fiber-optic cable, since the power and signal
wiring is taken care of. The financial benefits
are multiplied by clustering photoelectric sensor
units in this way.
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| High Resolution |
 The
conventional fiber-optic sensors offered by other manufacturers
are used for applications that involve transparent targets
(film, glass, etc.), but they are actually operating at
the limit of their capabilities.
The HPX-ET features an auto tuning capability: it can
automatically select from 5 sensitivity (gain) levels
that which gives the maximum signal differential for the
presence/absence of the transparent target. In order to
reduce the chance of misdetection, one can increase the
amount of light by moving the emitter and receiver closer
to each other, as illustrated by arrangement (2) in the
diagram. This allows a corresponding reduction in sensitivity
and hysteresis, so detection stability is improved. This
is quite impossible with the sensors made by other companies
since have a fixed gain.
This outstanding ability of the HPX-ET to detect very
fine differences puts it at a great advantage over the
competition. |
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| Dispersed
Remote |
Reducing space requirements with
remote units on a "clean" monorail
A monorail transportation system relies on fiber-optic
photoelectric sensors reading information encoded
in the form of black and white marks at specific
points on the rail. Clearly, important issues for
installing such a system are the convenient placement
of the fiber-optic and power cables, easy access
to allow sensor adjustment, and modest space needs.
The HPX-ET is able to meet satisfy all of these
requirements. |
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| Applications: |
| • |
"Clean" monorail transportation
systems |
| • |
General-purpose transportation
systems |
Main points: |
| • |
Reduced space requirements,
efficient wiring, shorter fiber-optic cables
Power and signal cables are connected to the
master unit, which features the necessary
indicators and dial switches. This means there
is no need to supply each sensor unit (amp)
with individual wiring. It frees up the space
behind the sensors, which is ordinarily required
for such wiring in the case of conventional
products.
Signal wiring is greatly simplified thanks
to the use of a MIL connector for the cable
leading to the master unit. Furthermore, by
employing remote units, the sensors can be
positioned in close proximity to the coded
information they have to read, while the master
unit can be positioned to allow easy access
for tuning. This dispersed remote approach
also means shorter fiber-optic cables are
required, further simplifying installation. |
| • |
Convenient placement
of the master unit for easy access
In addition to the advantages listed above,
the use of remote units allows the master
unit to be placed where the operator can easily
reach it. Pairs of remote units are linked
by one-touch MIL 10P connectors. |
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| BGS Tuning |
 Simple
tuning without a target
The tuning required for accurate detection of the fine
wires used in a wire-bonder is affected by the guide.
This makes it extremely difficult to achieve stable performance
if one is trying to employ 2-step tuning with a target.
Similarly, it is very difficult to achieve stable performance
using lead-frame detection tuning of the reflective type
when there is a background. This is because the amount
of light picked up by the sensor varies depending on the
type of target material.
However, if you make use of the BGS tuning capability,
unique to Yamatake's fiber-optic photoelectric sensors,
it becomes very easy to ensure accurate target detection. |
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| Applications: |
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Die-bonder |
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Wire-bonder |
Main points: |
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BGS (background suppression)
makes tuning extremely simple!
After installing the sensor's fiber-optic
cable, tuning can be performed without using
the target (wire or lead frame).
The sensor picks up the light reflected by
the background in the absence of the wire
or lead frame. This level is memorized. The
presence of a wire or lead frame naturally
results in an increase in the amount of light
received by the sensor, thus triggering detection.
This BGS approach is very reliable. |
Products: |
| • |
HPX-ET Series
Master unit: HPX-ET*
Sensor units: HPX-ETS
Remote units: HPX-ETR* |
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