Close contact [cross cutters, knives]

This article presents a cutter knife for synchronous and asynchronous cutters with scissors-cutting technique. A well-known design is using mechanically coupled cutters to provide synchronous motion of cutter cylinders, The cutting cylinders are braced by torsional force. The contact force between the knives has to be adjusted by a couple of adjusting devices (e.g., screws). It is necessary to readjust the equipment rather often for maintenance reasons. An improvement of this situation would be appreciated by the printing and foil production industries. A cutter distance sensor with good performance is required to introduce separately controlled servo drives in cutter knives. The test results obtained by test samples of the proposed sensor show that all information necessary for adapting the control structure and control parameters can be obtained by the proposed sensor concept. This type of sensor enables further progress in industrial drive applications, which leads to more replacement of mechanical designs by servo drives with flexible control.