Motion control system for reel to reel web transport apparatus

Details Motion control system for reel to reel web transport apparatus Motion control system for reel to reel web transport apparatus

1987-11-16

1989-01-31

Shoop, Jr., William M.

Electricity: motive power systems

With particular motor-driven load device

Tension-maintaining type of motor-control system

318 6, 242 7551, 242203, 242204, B65H 5938

Patent

active

048018538

ABSTRACT:
A motion control system for a reel to reel web transport apparatus which maintains a controlled tension on a web as it is transported between reels. The motion control system includes brushless direct current motors directly coupled each reel. A magnetic hysteresis brake is coupled to each reel by means of respective one-way clutches. During transport of the web from reel to reel, a magnetic hysteresis brake applies a controlled torque only to the reel supplying web. Thus, a controlled tension is maintained on the web at all times, even during loss of power to the DC motors.

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Permanent Magnets and Their Application, Parker & Studders pp. 249-252; John Wiley & Sons, New York Theory of Hysteresis-Torque Devices.

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