Product Features; Functional Principle; Magnetic Tape Variants - ELGO Electronic EMSC2 Series Operating Manual

5 Product Features

The EMSC2/LMSC2 is an incremental magnetic length measur-
ing system with 1 Vpp sine/cosine outputs. The sensor technology
and evaluation electronics are located in a compact housing,
which can be mounted horizontally or (if option L is ordered)
vertically to the magnetic tape.
The magnetic tape required for the measurement is glued onto a
flat surface with the supplied adhesive tape.
Depending on the version, a mounting distance of the sensor of max. 0.8 mm (EMSC) resp. max. 2.0 mm
(LMSC) to the magnetic tape must be observed.
The measuring system offers decisive advantages:
Measuring lengths theoretically unlimited
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Resolution of EMSC: 2 mm = 1 signal period
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Resolution of LMSC: 5 mm = 1 signal period
Very robust against contamination
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Sensor/mounting position horizontal or (optional) vertical possible
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Compact housing design and easy installation
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5.1

Functional Principle

The basis of the magnetic incremental encoders consists of a scanning technology, which scans the north and
south poles on the coded magnetic tape and produces a single Sine/Cosine wave for each pole.
Depending on refinement of the interpolation, together with the pole distance of the magnetic tape, the resolu-
tion of the measuring system is determined. The evaluation circuit prepare the signals accordingly and output
them as sine/cosine waves (channels Sin+ / Cos+ and Sin− / Cos−) with a level of 1 Vpp (see also  5.3
Representation of the Waveforms).
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Figure 1: Magnetic tape
5.2

Magnetic Tape Variants

Depending on the selected measuring system (LMSC or EMSC) different ELGO magnetic tapes must be used:
The LMSC variant uses the ELGO magnetic tape type MB20-50-10-1-R with 5 mm pole pitch.
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For the EMSC, however, the magnetic tape type MB20-20-10-1-R with 2 mm pole pitch must be used.
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If the interpolation rates are higher than 200 when using the EMSC, we recommend using the high-
precision magnetic tape MB20-20-10-1-R-HG, which is available at an extra charge (refer also to sec-
tion  10.1 Accessories).
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Product Features
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