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EuroWire – January 2012
50
News
Technology
For example, the LaserSpeed encoder
uses a unique, laser-based measurement
technique that does not make contact
with the wire or cable. It is permanently
calibrated and has no moving parts to
wear out. The system projects a unique
fringe pattern on the surface of the
wire or cable. As the product moves,
this movement creates a Doppler signal
scattered back to the LaserSpeed system.
This Doppler information is translated
into product speed and pulses are
produced to determine the product
length. The LaserSpeed encoder works
on all types of products, regardless of
colour, shape or texture. Length and
speed measurements are captured with
better than ±0.05% accuracy and ±0.02%
repeatability.
Ensuring marking accuracy during
sequential printing operations
Depending on the production require-
ment, manufacturers have installed the
LaserSpeed encoder at various locations
on the line. The most common place is
adjacent to the printing system just after
the jacket is extruded onto the wire or
cable. Since the jacket is still soft and
hot after the extrusion, the LaserSpeed
non-contact system provides the ideal
measurement method over contact
mechanical encoders.
Many manufacturers have installed the
LaserSpeed encoder before the capstan
station or take-up reel. Situating the
LaserSpeed encoder alongside the
printing system where the marking
occurs helps to better track the actual
length and speed.
To control the sequential printing
operation, the LaserSpeed encoder
outputs an index pulse directly to the
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LaserSpeed uses non-contact laser technology to measure product length and speed with ±0.05% accuracy
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LaserSpeed encoder alongside printing system before take-up reel