EoW November 2009

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EuroWire – November 2009 53
Power cables
Sikora’s X-Ray 8000 NXT measures the wall thickness of 3-layers of medium, high and
extra-high voltage cables directly after the extruder. Now, Sikora presents advanced
NTX-windows (Non-Toxic X-ray-windows) that replace beryllium windows in the upper
part of the X-Ray 8000 NXT.
The windows are integrated into the X-Ray 8000 NXT in order to separate the measuring
equipment from the pressurised area of the CV-line and to protect it against pressure,
high temperature and chemical by-products during the X-ray measuring process.
In contrast to beryllium, the new NTX-windows consist of a non-toxic material, which
avoids corrosion and thus contributes to an extended lifetime. In the last year Sikora has
already replaced beryllium with ceramic windows in the lower part of the scanner box.
With the present replacement Sikora offers exclusively non-toxic and technologically
improved windows for its X-Ray 8000 NXT.
The new NTX-windows are high temperature resistant ensuring high mechanical
strength and rigidity. They offer an excellent chemical and hydrolysis resistance and
a high thermal stability.
Sikora AG – Germany Fax: +49 421 48900 90
Email: Website:
NTX (Non Toxic X-ray)-windows and ceramic windows separate the measuring equipment from the pressurised ▲ ▲
area of the CV-line
New software
options for
wire and
cable testing
Fast Fourier Transform (FFT) allows users
to analyse periodic deviations in, for
example, the diameter of a wire or cable.
By combining the FFT information with
specifications for line speed, Total VuTM
from LaserLinc can identify likely causes
of the measurement deviation, such as a
faulty pulley.
Total Vu supports any number of FFT input
measurements, allowing the user to tailor
the resolution of the frequency analysis
and view the resulting frequency-domain
graph for each.
The user may also select any FFT data
point to see its magnitude, the harmonic
frequencies associated with it, and the
diameter of a pulley that could be
responsible for the deviation.
Structural Return Loss (SRL) is an option
of the FFT package. By analysing the
periodic deviation of certain measure-
ments, such as core wire diameter, the
software can compute the signal loss
that will occur at various frequencies
throughout a length of cable.
Monitoring SRL during production makes
it possible to correct problems much
faster, reducing scrap and improving
production line throughput.
LaserLinc manufactures non-contact,
precision laser and ultrasonic systems
for measuring OD, ID, and wall thickness
for the wire and cable industries.
The interface for the measurement
hardware is LaserLinc’s sophisticated,
yet operator-friendly measurement/data
processing package, Total Vu, which runs
on any Windows-based PC.
Besides FFT and SRL, Total Vu also
provides in-process tolerance checking,
trending, SPC, control, data logging, and
other features. Options are available
for monitoring other variables, such
as pressures, temperatures, loads, and
speeds, to provide a complete view of
the manufacturing process.
LaserLinc Inc – USA
Fax: +1 937 318 2445
Email:
Website:
Quality control in high
voltage cable