Page 20 - Keubler Motion Sensors

Basics

Encoders Introduction

Encoders can be used in applications, where In principle we can supply all encoders, whether
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length, positions, speed or an angular position are with a solid shaft or in a hollow shaft version.
measured. They transform mechanical movements
Using a hollow shaft encoder saves up 30 % of costs
into electrical signals and can be divided into incre-
mental and absolute measuring systems. and up to 50 % of the required space compared to a
shaft encoder. This is achieved by avoiding additio-
Incremental encoders generate pulses, where the nal couplings, brackets and other assembly aids.
number of pulses can be a measure of speed, length
or position. To mount a hollow shaft encoder it just needs to be
pushed onto the shaft, clamped, and in the simplest
In absolute encoders, every position corresponds case prevented from rotating by using a cylinder
to an unique code pattern. No reference runs after pin. Moreover, in principle, hollow shaft encoders
starting-up are necessary as with incremental require less installation depth.
systems. Safety is increased and the time taken for
reference runs is saved.

Application examples
Angular measurement Positioning Detecting of fork’s position

Detecting of position Angular measurement Velocity measurement
e.g. in drive engineering
(geared motors)

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