Rieter

Continuous operation

Index

As a concept, this is not new in the blowroom; it has been used for a long time in the scutcher as pedal regulation of the feed to the beater. What is new is that now the whole blowroom line operates continuously and regulation is performed electronically. This installation, developed by Trützschler, will be presented briefly (see Fig. 71).

The central regulating unit, to which all the individual machines are connected, is the “CONTIFEED”. This receives an analog signal from the tacho-generators of the cards; the instantaneous demand for material is continuously calculated from this signal. Using this demand, the microcomputer can establish the basic speeds of all drives that determine the throughput and the drives can be correspondingly controlled. A second signal is superimposed on this basic speed signal, derived from the contents of the storage unit of the succeeding machine. In this way, the successive machines are linked via individual control loops. The programs for speeds, production quantities and allocation are first established manually, which represents a fairly substantial initial outlay. When balanced operation is achieved, they can be transferred to the “CONTIFEED” and stored there.

Fig. 71 – Trützschler CONTIFEED