Manual
Limes LA10 / BA1
Absolute Magnetic Length Measurement System
4. Product Features
The series LA10 is an absolute length measuring system. Sensor and translator and interpo-
lation unit are together in one housing. The magnetic tape of series BA1 is paste up to a plain
area. The LA10 can be mounted with a max. distance of 0.2 mm to the magnetic tape. Different
interfaces are available (SSI, CANopen (DS406)).
Typical applications are handling systems, conveyor and storage technology, hydraulic
presses, stamping machines, casting machines, linear slides, linear drives and pick and place
systems.
Overview of features:
·
no reference necessary.
·
direct contact free measurement.
·
distance between sensor and magnetic tape can be between 0.1... 0.2 mm
->Distance not ok = LED glow red.
·
up to 8 m measuring length.
·
high resolution 1
µ
m.
·
repeat ac/- 1
µ
m.
·
inured against dirt.
4.1 Functional Principle
A Hall sensor and a magneto-resistive impedance measuring bridge are guided over a two-
track magnetic tape with a fine-interpolation trace and an absolute trace. Together with the
sensor line the absolute track provides an absolute value and the fine-interpolation trace
provides together with the interpolation electronic the measuring systems high resolution.
Figure 1 shows two magnetic traces, with north pole and south pole magnetization. The fine
interpolation trace encloses alternately north and south pole traces with a distance of 1 mm,
these are scanned with resistance bridges and provide a resolution of 0.001 mm. The absolu-
te value provides the sensor line with 16 single Hall sensors, these sensors are scanning the
code sections of the north and south poles. The absolute value on the magnetic tape recurs
every 8 m.
Interpolation trace
Not magnetised area
Absolute trace
Figure 1: Coding
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