Function And Characteristics; Function - Balluff BTL6-E500-M E2 Serie Manual De Instrucciones

BTL6-E500-M_ _ _ _-E2/E28-KA_ _/KE_ _/LA_ _
Micropulse Transducer - Rod Style
2

Function and Characteristics

2.1

Function

The transducer contains a tubular
waveguide enclosed by an outer
stainless steel rod. A magnet at-
tached to the moving member of the
machine or to the cylinder piston is
moved over the rod and its position
constantly updated.
The magnet defines the measured
position on the waveguide. An inter-
nally generated INIT pulse interacts
with the magnetic field of the mag-
net to generate a magnetostrictive
torsional wave in the waveguide
which propagates at ultrasonic
speed.
Fig. 2-1: Output signal with rising characteristics
The torsional wave arriving at the
end of the waveguide is absorbed
in the damping zone. The wave ar-
riving at the beginning of the wave-
guide creates an electrical signal in
the coil surrounding the waveguide.
The propagation time of the wave is
used to derive the position. This is
output as a current value and has
rising characteristics, ➥ ➥ ➥ ➥ ➥ Fig. 2-1.
This process takes place with mea-
suring high precision and repeatabil-
ity within the stroke range defined
as nominal stroke length.
Output signal
Null point
When there is no magnet located in
the nominal stroke range, a signal is
output as an error indication.
At the rod end is a damping zone,
within which no reliable signal is
available, but which may be entered
by the magnet.
The electrical connection between
the transducer, the controller and the
power supply is via a cable or
leads.
Dimensions for installing the Micro-
pulse transducer: ➥ ➥ ➥ ➥ ➥ Fig. 3-1.
Position of the magnet:
1) in the nominal stroke range
2) no magnet located
End point
english
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