Digital control system

Details Digital control system Digital control system

1974-12-26

1976-08-03

Dobeck, B.

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

B65H 5938

Patent

active

039731740

ABSTRACT:
A digital control system for regulating the speed of a running web roll so as to maintain uniform tension in the web measures the speed of the running roll with a first tachometer and measures the speed of a fixed diameter roll in control with the web with a second tachometer. A resettable counter is incremented by the pulses from the second tachometer and is reset by the pulses from the first tachometer so that the contents of the counter are indicative of the amount of web having traveled over the fixed diameter roll during the time in which the running roll has rotated through a selected angle. The contents of the counter are then used to control the torque applied to the running roll.

REFERENCES:
patent: 3671824 (1972-06-01), Dinger
patent: 3764087 (1973-10-01), Paananen et al.
patent: 3809335 (1974-05-01), Mantey

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