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SPARKS
ELECTRICAL NEWS
SEPTEMBER 2016
CONTRACTORS’
CORNER
6
ENCODERS
FOR SMART MOTION CONTROL
DATALOGIC,
a global leader in the industrial
automation markets, and world-class producer
of sensors, now offer a complete range of
incremental and absolute rotary encoders for
industrial automation applications, such as motion
control, length measurement and positioning.
Datalogic’s range of encoder products is com-
posed of four lines:
• ENC41 incremental encoder basic line offers
a reduced dimension and pricing, thanks to
the compact Ø41fibre glass epoxy case, with-
out compromising the robustness and overall
performance.
• ENC58 incremental encoder extended line,
with industrial standard Ø58 mm metal case,
includes the widest range of mechanical vari-
ances, resolution from 500 up to 10 000 PPR
and programmable version.
• AST58 Absolute single-turn encoder line, in
the standard Ø58 mm metal case offers a
resolution up to 13 bit, Gray SSI output, hollow
shaft Ø15 mm or solid shaft Ø6 and 10 mm,
all available with cable, M12 or M23 connector.
• AMT58 Absolute multi-turn encoder, in addi-
tion to the characteristics already described
for the single-turn, this line offers a 13 x 12 bit
resolution x turns in the Gray SSI models, or
even 18 x 16 bit in the Fieldbus version, which
include CANopen, Devicenet, EtherCAT, Profi-
bus, and Profinet.
Furthermore, a wide range of accessories is avail-
able, such as mechanical couplings, mounting
fixtures, connectors and cable, as well as metric
wheels and draw wires for linear measurement
applications.
This new Encoder product range is a perfect
complement to sensors and to ID, vision, laser-
marking, being present in most applications as
position transducer.
MAIN APPLICATIONS
Motion control is the most common application,
the encoder is mounted directly to the end of
a motor via a shaft and provides feedback to
a drive to verify that the speed and direction is
correct.
Web speed or tension control is another ap-
plication where an encoder is mounted so that
any unevenness in the rotating speed of the
tension roller is fed to a controller to maintain
an even tension.
Length measurement applications use an en-
coder mounted on a wheel, in order to convert a
linear movement to a rotation angle, or number
of rotations, providing a length measurement to
control cutting, folding and other operations.
Conveying is another common industry ap-
plication where encoders are used to control
speed and position of a motor or intermediate
axle shafts along conveyors. Encoder informa-
tion is synchronised, for example, to control bar-
code scanners or label printers.
Automated packaging machinery has many
axis of high-speed rotary motion that require
feedback for motion control, hence, the fre-
quent need of encoders for speed or position
feedback, length measurement and positioning.
Enquiries: +27 10 202 3300
JB Switchgear was recently awarded a contract by
Rula Bulk for the design, manufacture and supply of
a new containerised switchgear substation to replace
the old motor control centre at the Fly Ash processing
plant at Matla, near Kriel in Mpumalanga. With four
state-of-the-art classifiers, Matla has an annual
capacity in excess of 800 000 tons of DuraPozz Pro.
JB Switchgear supplied its well-known Eagle series
motor control centre and PLC panel, fitted into a
specially modified marine container.
Enquiries: +27 11 027 5804
Ash plant gets new
containerised
switchgear substation