EoW January 2012

News Technology

▲ ▲ LaserSpeed uses non-contact laser technology to measure product length and speed with ±0.05% accuracy

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

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

▲ ▲ LaserSpeed encoder alongside printing system before take-up reel

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EuroWire – January 2012