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3.2 Reliability
With its compact dimensions, the exposed linear encoder from NUMERIK JENA is equipped
with two scanning fields. The scanning signals are generated by two large 1.1 mm² sensor
fields.
Local contamination on the measuring element such as dust, fingerprints or particles have
only a minor effect on the signal amplitude, as the ASIC SV4 installed in the measuring head
monitors the signals and eliminates any deviations in the amplitude�
If the signal amplitude decreases due to the presence of contamination on the measuring scale,
the sensor amplifier readjusts by increasing the signal amplification. The output signals do not
change in offset and phase position� The result is a constant signal shape�
This measuring system is especially suitable for applications that require high reliability�
Image 2
Fingerprint
Wire (50 µm)
Oil film
Dust
Signa
ls
in V
PP
Position in mm
Online compensation active
Online compensation inactive
