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26 LINK 58 . 2 /2011 PARTS Rieter nippers Rieter combers have been developed to operate at high nip rates. Original spare parts from Rieter are essential to enable this advantage to be exploited throughout the machine’s life cycle. This is also true of the nippers. They feature the high precision of a Swiss watch movement and are as unique as a fingerprint. Fig. 1 The manually adjusted nip line means that each original Rieter nipper is a high-precision part with its own unique fingerprint. Each nipper is unique The Rieter nipper incorporates production and technology know-how that has been developed over decades and has demonstrated its qualities in the operation of more than 100 000 nippers worldwide. Rieter nippers feature unmatched precision in clamping the laps. In order to manufacture a nipper with such precision, Rieter has for many years used a special process for optimizing the nip line of each individual nipper – adjustment by hand with the precision of a Swiss watch movement. Each nipper therefore has its own unique fingerprint. Its manufacturing data are logged and archived, and can be traced back over 20 years. Precision for optimum quality High-precision clamping of the lap, in conjunction with the optimized motion of the circular and top combs, results in outstanding combing action over the comber’s entire speed range. Poor fiber selection has a negative impact on yarn quality and thus on profitability. This is usually because the lap has not been combed with sufficient precision. Rieter nippers always clamp precisely and perfectly. Faster return on investment Using Rieter nippers has a positive influence on profitability within the combing process. Original Rieter nippers enable output to be increased by up to 15 percent, while reducing noil extraction by up to 2 percent at the same time. Rieter nippers are key to combing profitability. 11-208 • Urs Tschanz Head Sales Support Parts SYS Winterthur urs.tschanz@rieter.com
Improved package build with anti-patterning control Frequency-controlled, motor-powered pattern breaking – the APC (Anti- Patterning Control) upgrade package for rotor spinning machines optimizes package build. The conversion kit is available for R 1, R 20 and R 40 (Version 1 to 3) rotor spinning machines. Fig. 1 Inverter and controller for the APC upgrade package. Fig. 2 Anti-Patterning Control upgrade package in the headstock. Higher draw-off speeds in weaving and knitting make optimal package build increasingly important. Preventing pattern winding results in improved take-off behavior in downstream processing. Electronic pattern breaking such as that in use since the R 40 rotor spinning machine (Version 4), has demonstrated its outstanding qualities in the field. Customers with R1, R 20 and R 40 (Version 1 to 3) rotor spinning machines can now also benefit from this innovation. The APC (Anti-Patterning Control) upgrade package has been developed for this purpose. The mechanical regulating wheel has been replaced here by a frequency-controlled, motor-powered pattern breaker. Maintenance-friendly design In addition to the mechanical regulating wheel, other parts susceptible to wear – such as the special belt and the mechanical pattern-breaker gear – are also dispensed with in the new system. This reduces maintenance effort. The new system completely eliminates the cost of purchasing or replacing these mechanical parts. Jörg Feigl Project Manager Parts Ingolstadt joerg.feigl@rieter.com LINK 58 . 2 /2011 PARTS Optimal and variable pattern breaking Perfect package build is the result of optimal pattern breaking. This prevents first-order pattern winding (1:1 pattern winding) and uncontrolled package winding. A separate motor with an electronic random-check generator ensures optimal pattern breaking. The rotation speed of the traversing gear can be finely controlled. The independent, motor-powered drive of the traversing gear also reduces the load on the winding cylinder drive. The rotation speed of the winding cylinder shaft is picked up by a motion sensor (initiator). The necessary rotation speed for the motor is calculated by the controller and transmitted to the inverter (Fig. 1). The motor speed at power take-off is then checked and regulated. Thus processed, these measured signals permit very accurate regulation and thus faultless pattern breaking. Two optional settings on the controller enable pattern-breaking intensity to be variably adjusted, usefully and very easily. These two adjustment options depend on the delivery speed and the yarn properties (pronounced snarling tendency, high elongation or other unusual properties). The angle of intersection is still adjusted by means of change gears. Higher productivity, longer service life Technical and technological developments in rotor spinning continue to make progress. The APC upgrade package (Fig. 2) also modernizes older machines to the latest state of the art. Improved package quality without ribbon formation, reduced maintenance effort and longer service life of the pattern breaker make investment in this upgrade package a worthwhile proposition. 11-209 • 27
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