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Machine Design

The Wind-Up And The Measure

Industrial draw-wire encoders measure linear displacements from 1 to 40 m.

Draw-wire transducers use a drum on which a measuring wire is wound. A rotary encoder or potentiometer connects to the spring-loaded drum, which automatically retracts the wire to an angular position. A minidraw unit is available in 1 or 2-m lengths with incremental or analog outputs. Units from 2 to 40 m provide incremental, absolute, or fieldbus outputs. Typical applications include cranes, elevators, forklifts, and scissor jacks.

Turck Inc. USA,
3000 Campus Dr., Minneapolis, MN 55441,
(800) 544-7769,

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