D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
341/48
D21F 7/00 (2006.01) B21D 1/05 (2006.01) D21F 7/02 (2006.01) G05B 19/048 (2006.01) G05B 19/07 (2006.01)
Patent
CA 1182544
ON-LINE CONTROL FOR PAPER MACHINE DRIVE ABSTRACT OF THE DISCLOSURE The on-line control system is for use with a mill having a plurality of stands with a drive for each stand. A master control provides speed reference signals for each stand and the speed reference is stored in a memory at each stand where it is accessed, compared to actual speed, and the drive speed adjusted as a result of the comparison. If the master control signals should be interrupted, the mill will continue to operate on the basis of the individual speeds stored at each stand until the process requires a speed change at one or more stands. This provides time for the fault to be located. The on-line control system permits safe operator adjustment of the speed when required to keep the mill moving. A module is connected to the stand and the connections checked automatically. Then the speed reference is transferred from the memory in the stand to a memory in the module and checked. Then the module transmits that speed reference as its first speed reference signal, and operator speed adjustment starts from that speed reference.
408544
Murdoch James C.
Spanakos Christos
Canadian General Electric Company Limited
Eckersley Raymond A.
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