Construction And Function; Construction; Function - Balluff BTL6-A500 M E2-KA Serie Manual De Instrucciones

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BTL6-A/E500/B50 _ -M _ _ _ _ -E2/E28-KA _ _ /LA _ _
Magnetostrictive Linear Position Sensor – Rod Style
3

Construction and function

BTL6-...-KA
Mounting
surface
25.2
30-1
1)
21
13
Ø24
25
45°
4
O-ring
7.5
Support ring
Version
D1
...-E2-...
10.2 mm
...-E28-...
8 mm
1) Unusable area
2) Not included in scope of delivery
Fig. 3-1:
BTL6-A/E500/B50_-...-E2/E28-..., construction and function
3.1

Construction

Electrical connection: The electrical connection is made
via a cable or strands and is permanent (see Type code on
page 12).
Housing: Housing containing the processing electronics.
Fastening: The BTL can be fastened in a fitting bore
(Ø 48 H8), but must be sealed with the provided O-ring
and support ring. The body of the BTL is fastened using
3 M5 threaded pins at a 120° angle. The BTL with
Ø 10.2 mm has an additional thread at the end of the rod
to support larger nominal lengths.
Magnet: Defines the position to be measured on the
waveguide. Magnets are available in various models and
must be ordered separately (see Accessories on page 11).
Nominal length: Defines the available measuring range.
Rods with various nominal lengths from 50 mm to
2000 mm are available depending on the version:
Ø 10.2 mm: Nominal length from 50 mm to 2000 mm
Ø 8 mm: Nominal length from 50 mm to 1016 mm
Damping zone: Area at the end of the rod that cannot be
used for measurements, but which may be passed over.
6
english
Nominal length =
Measuring range
2)
Magnets
G
Thread M4x4/
6 deep
No thread
1)
Damping zone
63.5
G
BTL6-...-LA
25.7
21
3
25
4
7.5
3.2

Function

The BTL contains the waveguide which is protected by an
outer stainless steel tube (rod). A magnet is moved along
the waveguide. This magnet is connected to the system
part whose position is to be determined.
The magnet defines the position to be measured on the
waveguide.
An internally generated INIT pulse interacts with the
magnetic field of the magnet to generate a torsional wave
in the waveguide which propagates at ultrasonic velocity.
The component of the torsional wave which arrives at the
end of the waveguide is absorbed in the damping zone to
prevent reflection. The component of the torsional wave
which arrives at the beginning of the waveguide is
converted by a coil into an electrical signal. The travel time
of the wave is used to calculate the position. Depending
on the version, this information is made available as a
voltage or current output with a rising gradient.
Ø 48 f7
Ø 38.9
Ø 48 f7
Ø 38.9

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