DIGITAL TRANSDUCER
Configuration and Modbus Interface
PRELIMINARY
PCS III Technical Description CANopen 1r1 UK 310715.docx
09/02/2021
S2Tech srl
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6.
MAGNETIC CURSORS SUPPLIED BY S2Tech
6.1.
WITH RADIAL MAGNETIC FIELD
These are ring models: ARR-1E; ARR-2E; ARR-3E.
They consist of rare earth cylindrical magnets, radial to the probe and contained inside polyamide
plastic or aluminum rings.
Polarities are shown in Fig. 5.
The ring works correctly regardless of which side of the ring is pointed towards the measuring
head.
The cursor can be fixed with glue or non-magnetic screws (AISI 300 series stainless steel, brass,
etc..)
Take care to apply instructions given in figure Fig. 1
– 2. The space “C” in Fig. 2 can be filled with
a non-magnetic material. (e.g. aluminum).
6.2.
WITH AXIAL MAGNETIC FIELD
Ring toroid (Fig. 3): They are from ARA-5F models to ARA-10E models.
Toroid Cursors with opposing poles on the two base planes.
Important
: in order to work correctly it is necessary that the polarity towards the measuring heads
corresponds to the one indicated in Figure 3.
The material (ferrite (= F) or rare earth (=E) ) is hard and delicate. It cannot be drilled and must
be fixed with glue, preferably inside the relative housing or with an adapter made by the User.
6.3.
FREE FLOATING CURSOR
Model AFR-1E
–(
Figure 4A
):
It contains two parallel magnets arranged in radial fashion on a plate made of non-magnetic
material, supplied with central fixing holes.
The distance from the AFR-1E cursor and the measuring probe must be 5mm with a ±1mm
tolerance.
After having clamped the cursor within the above mentioned tolerance, when moving along the
probe, It must nonetheless maintain a
0,2 mm maximum fluctuation from the probe.
These distances must be constant along all the measuring stroke onto the mod. PCR
transducers.
Whenever the distance is bigger than 6 mm, there is not enough magnetic field magnitude to
recognize the magnetic cursor position.
