EoW May 2011

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EuroWire – May 2011 39
technology news
“ ACID-FREEPROCESS FOR STEEL
ROD CLEANING & SURFACE
PREPARATION”
“New Way to Draw Steel Wire
in the 21st Century”
DCCD process features:
• Eliminates acid, borax and precoatings
• Zero energy consumption
• Direct drawing from bare rod with no
speed limitation, for H/C and L/C
• New Lubricant Viscosity Control
provides exceptionally adherent coating
• Adjustable lubricant residual
• Zero lubricant waste
• Recommended for severe drawing
applications (spring, rope, bead,
CO2 welding, PC strand, plating quality)
• H/C wire drawn at 18 m/s (3600 ft/min)
• Up to 8 times longer die life
• Exiting wire temp. 45°C (113°F)
• Greatly improved wire ductility
DECALUB
31, avenue de Condé
77500 CHELLES, FRANCE
Fax: +33 1 60 20 20 21
E-mail:
Website:
The manufacture of data cables demands
a consistent control of the cable
diameter, eccentricity and capacitance
regarding periodic variations. Sikora
offers innovative, user-friendly measuring
systems, which are specifically developed
for quality control of data cables during
the production process.
The diameter gauge heads of the
Laser Series 2000 and 6000 operate
with the patented Laser Shadow
projection principle. By evaluating
diffraction information for the diameter
determination, a single reading precision
as high as 0.2μm besides a measuring
rate of 2,500 measurements per second
is achieved. This precision is maintained
because no moving parts are included in
the gauges. By means of the integrated
measuring value display in the gauge head
the operator gets the accurate diameter
value at a glance.
The Centerview 8000 combines diameter
and eccentricity measurement. Using
optical and inductive measuring
technologies, high-precision single
eccentricity readings with a high
measuring rate at the same time are also
supplied by these gauges.
The cloud diagram is an innovative display
format of the ongoing measurement at the
processor system Ecocontrol. It provides
information on distribution of short term
variation of eccentricity in graphical
form. Each dot corresponds to one single
measuring value of the eccentricity in
relation to the amount and direction.
The extension of the cloud diagram is the
indicator for the standard deviation of
the eccentricity. For example, a circular
distribution of the single values shows
its range of variation. The display helps to
optimise the extrusion process with regard
to a minimum standard deviation.
In Sikora’s capacitance gauges,
Capacitance 2000, a short and a long
measuring electrode are integrated in one
tube. The short sensing electrode of 10mm
length allows for a reliable measurement
of fast periodic capacitance fluctuations
for the FFT-analysis and prediction of
the structural return loss (SRL). The
long electrode allows for a precise
measurement of the mean value of the
capacitance. Thus, the defined impedance
of the cable can reproduced exactly. SRL
predictions up to 3GHz are feasible at line
speeds up to 2,400m/min respectively
8GHz up to 1,300m/min.
Powerful digital signal processors are
included in all Sikora measuring heads.
Because of this computational power,
a complete SRL prediction is realised
just inside the gauge heads. Ten years
ago, Sikora integrated this technology
in the measuring devices of the Inline
2000 Series. This means that the online
prediction of the SRL performance is
entirely executed where the input data
(ie diameter, eccentricity, or capacitance
readings) is available in high resolution
and high precision. Due to the all-digital
signal processing inside the Sikora gauges
noise is kept at a minimum allowing the
detection of even minor periodic cable
parameter fluctuations.
Sikora AG – Germany
Fax: +49 421 48900 90
Email:
Website:
Cables without data loss
▲ ▲ Centerview 8000 installed in-line