From pulling the material with rollers and coils, to the control of the dancer/winder and cutting and positioning of labels – there are numerous areas where NORD drives are tailored to fit perfectly in the textile industry.
From wool to sweater...
Today, the path wool takes to the finished sweater is highly automated: Spinning and winding machines, weaving and knitting machines, dyeing and washing machines, cutting and sewing machines – together, they meet the high demands of the textile industry. NORD drives are optimally equipped for these special needs. NORD drives are absolutely leak proof and can handle large temperature ranges. Additionally, NORD drives are constructive of special materials and coatings that will resist corrosive agents, such as acids and bases.
... with servo support
When using digital servo controllers, an enormous increase in efficiency and quality can be achieve in relation to conventional drives. When winding on and off endless material, e.g. the material usually has to be transported at a constant speed in order to avoid tearing, even if the radius of the roll increases or decreases. With conventional drives, the speed of the material roller is adjusted based on a measurement technique that continuously detects the diameter of the roller. Digital servo controllers, on the other hand use a winding computer, which eliminates the need for conventional measurements of the roll radius.
The current diameter of the roll, and the resulting torque for the tensile force, is continuously calculated from the starting diameters of the reels and the nominal pull, taking into account the friction coefficient and the moment of inertia. In the case of systems that start and stop in cycles and in which a dancer roll compensates for fluctuations in the tensile force, their position can be detected by a potentiometer and transmitted to the servo control system. NORD’s intelligent controllers thereby also carry out drive control tasks simultaneously. To do this, they are equipped with an integrated, realtime-capable PLC that stores up to a minimum of 200 lines, and up to 700 on request. Above all, the servos provide technology functions that can be immediately implemented and that no longer require programming, but simply need to be configured.
Conveying with the TRIO
Since conveyor lines in the textile industry often bridge large distances, it is ideal for a modular design of both the machine and the system. In the same way, the roller conveyors and belt conveyors also require an AC Vector control. Trio SK 300E is a particularly efficient and economical solution already in the planning, installation and commissioning phases: It combines an AC Vector drive SK 300E, motor and gearbox into one unit, and integrates a line filter as well. The AC Vector Drive unit is plugged onto the motor terminal box. This integrated design eliminates the need to shield motor cables and thereby guarantees the drive meets EMC guidelines. The AC Vector drive has IP66 enclosure protection and has an integrated heat sink which handles an ambient temperature range of 10°F to 120°F. The AC Vector drive is further protected thermally, has an integrated brake chopper and a driver unit for an electromagnetic brake. The SK 300E resists voltage spikes and is over 97 percent efficient.