New & Improved

Spinning Technology

Textile World Asia Special ReportNew & ImprovedSavio’s new AES Fenix assembly winder
produces a wide range of flanged packages and offers a new electronically controlled yarn guide

Savio Macchine Tessili’s Assembly Electronic Savio Fenix winder (left) with computerized
Chameleon packageSavio Macchine Tessili S.p.A., Italy, a producer of assembly winders and
two-for-one twisters, has introduced a new product to the yarn finishing sector — the Assembly
Electronic Savio (AES) Fenix winder.The new winder comes equipped with a wide range of flanged
packages featuring different configurations for feeding different types of twister spindles
available on the market.The flanged package optimally protects the yarn package, which can be
transported easily in the next production cycle with no danger of being accidentally damaged during
handling.A new electronically controlled yarn guide system enables the operator to program the
pitch according to yarn count. This feature leads to such advantages as:• extra-high yarn density
without any additional stress on the yarn – providing an increase in weight of 22 percent over
cross-wound packages — due to correct programming of the yarn deposit according to its count
without the use of tension (See Figure 1);• package density programmable in three sectors, making
the machine particularly suitable for processing difficult or delicate yarns or for doubling yarn
plies with different characteristics; and• very low processing cost due to fewer packages — in
other words, a greater allocation of heads and spindles in the relative twisting and assembling

Package QualityAccording to Savio, a high level of quality is ensured because in ideal
conditions, the doubled yarn package can be unwound during twisting with a more even twist,
resulting in fewer breaks.The AES Fenix features direct control on the package axis with no
slippage because it turns freely without the yarn touching any driving surfaces, which is ideal for
the yarn.Neither the direct control on the package axis nor the electronically controlled yarn
guide require adjustment for the cross-winding angle, friction, counterweighting or antipatterning.

Perfect LengthThe direct control on the package axis, which is slip-free, ensures a precision
that Savio claims has never before been reached in yarn length. Each head is fitted with a
high-precision meter counter with a tolerance of +/-0.5 percent, which eliminates yarn waste at the
end of twisting and guarantees optimized subsequent processing cycles, according to the company.The
control of the maximum diameter available on each head permits a rapid determination of the length
required.FlexibilityTechnical solutions featured on the new winder simplify control of package
takeup, both mechanically and constructively, rendering lot change particularly easy.Maximum
flexibility is guaranteed by the control computer, allowing separate adjustment of machine sections
(assembly speed and meter counter) so that different yarn lots can be processed, with programs for
storing and automatically setting the work parameters of each lot.If the yarn breaks before the
single broken end can be wound around the package, instant braking of the head allows quick repair
of the single end, ensuring enhanced quality of the doubled yarn and subsequent twisting.Assembly
speeds range from 250 meters per minute (m/min) to 1,200 m/min — made possible due to the parallel
winding of the yarn and minimal accelerations of the grooved roll (See Figure 2).The AES Fenix is
designed for assembling two plies with through feeding (head/tail end), and up to a maximum of four
plies.Feeding is simplified because the external package cradle creel with universal pegs can
accommodate packages of any taper and diameters of up to 280 millimeters (mm).All discontinuous
fiber yarns can be processed — including cotton, wool, silk, linen and the same blended with
man-made fibers — in a range of counts, including from Ne 1.5 to the finest in the cotton sector,
and from Nm 2 to the finest in wool.The continuously adjustable universal spindle with winding
traverse from 152 mm to 250 mm completes machine flexibility.More Features Enhance ProductivityVery
little energy is consumed due to the winder’s construction simplicity and innovative technical
control solutions. The AES Fenix has an installed power of 200 watts per head and also features a
consumption that varies from 60 watts to 120 watts per head, depending on work parameters.Operator
ergonomics are optimized by the position of the feeding packages on the external creel and the low
level of machine noise. Enhanced operator efficiency is a decisive factor for quality and
production capacity.Minimal maintenance is necessary because there are few mechanical parts;
inverter-controlled air conditioning motors are used to control the spindle; and components have
been tested for reliability.The new AES Fenix features air or water splicers and an optional
fan/traveling blower to ensure a clean machine while working.

January/February 2005