Analog automatic slowdown system

Details Analog automatic slowdown system Analog automatic slowdown system

1975-03-27

1976-09-07

Christian, Leonard D.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

72 10, 242 675, 242 7545, B21C 4716, B21B 3700

Patent

active

039790800

ABSTRACT:
An analog automatic slowdown control system is described for determining the optimum instant of time to initiate slowdown, for a process line in which a coil of material is being unwound from a mandrel at a linear speed. Using the intelligence derived from the linear speed and the speed of the unwind reel, signals are derived for: the instantaneous diameter, the desired remaining portion of the diameter after stopping, and the change in diameter during deceleration. These three signals are algebraically summed with a signal which is a function of the mandrel diameter, and when the summation is zero, slowdown is initiated.

REFERENCES:
patent: 3518857 (1970-07-01), Hancock et al.
patent: 3553992 (1971-01-01), Harbaugh
patent: 3663806 (1972-05-01), Drankhan et al.

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