Catalog excerpts
DRAW-WIRE ENCODER LS501 The draw-wire encoder is designed to measure the lengths (electronic measuring tape), and the linear trajectory. The encoder is usually firmly attached to a basis and the suspension of the wire is attached to the object to be measured. The wire rewinding is provided with a spring. The encoder is available in the version with the incremental encoder (LS-D type) or the multi-turn potentiometer (LS-P type). For the encoder with a potentiometer the measured trajectory is proportional to the resistance, and the value is absolute and analogue. With the incremental encoder, the distance is proportional to the number of pulses and is relative. The resolution is determined by the number of pulses per revolution. If the incremental encoder is equipped with a zero pulse, this pulse is sent at each revolution of the coil — i.e. 10-times for the whole measuring range. The draw-wire encoders are used for undemanding measuring procedures, e. g. for material feeders, elevators, handling technique, etc. Technical Data
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Electrical Data Resolution Length absolute error (of a pulley) Nonlinearity Measurement repeatability Draw wire thermal expansion Supply voltage (V DC) Slider current recommended/max (mA) Output signals 500 pulses/rev. (1000 upon request) 0.05 mm for 1000 mm 0.0625 mm for 1250 mm 0.1 mm for 2000 mm max. 0.1% 5k/10 revolutions (10k upon request) Theoretically almost infinite - +0.05% MR +0.25% MR +0.015% MR +0.1% MR 0.0117mm/mK (error 0.001%/K - may be omitted in practice) + 5 V/50 mA (possible power supply with 18 to 30V upon request) Digital A+B signals without negations (with zero pulse...
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