• NPS Drive Automation Private Limited

Intermittent Drives For Cross Cutters & Flying Saws

NPS Drive Automation offers Intermittent Drives for Cross Cutters and Flying Saws. These are machine functions with which continuous material is processed in cycles or separated during the movement in continuous processes. Typical applications include: cutting, sawing, punching, welding, embossing, perforating, paper webs, metal webs, plastic films, wood or plastics. In all these tasks the movement during processing is synchronised with the material speed. The position of the next step is approached in the time between the processing steps and this sometimes has to be synchronised to a registration mark. This movement therefore depends on the format length to be produced. Cross cutters and similar machine functions such as welding bars or embossing stamps function in a rotary way. The drive at the output end rotates by one cycle for each machining process. Highly dynamic acceleration and braking is needed for this. Cross cutters therefore place great requirements on the dynamic performance and precision of the drive. Flying saws and related functions on the other hand are translatory. During the machining process, they move synchronously with the material speed. At the end, they have to move back to the next processing position. High dynamic performance is again often needed here for the return travel. Drives for cross cutters and flying saws are sized on the basis of the dynamic requirements of the motion sequence. The demand for exact position control and high dynamic performance require the use of geared servo motors. Synchronous motors are used for smaller ratings and achieve a high dynamic performance thanks to their low mass inertia and high overload capacity.