Auxiliary torque back-up roll

Details Auxiliary torque back-up roll Auxiliary torque back-up roll

1981-02-26

1983-04-26

Bray, W. D.

Woodworking

Process

Mechanical cutting or shaping

144209R, 364174, B25C 100, B27L 500

Patent

active

043810233

ABSTRACT:
A power back-up roll for a rotary veneer lathe comprises a drive roller for applying a rotational force to the outer periphery of a log axially mounted on the veneer lathe, a controllable drive source for driving the roller and a servo-control system for maintaining the static friction between the roller and the log. In a preferred embodiment of the invention, the servocontrol system includes a first DC-generator tachometer for monitoring the peripheral speed of the log, a second DC-generator tachometer for monitoring the peripheral speed of the roller; and a feedback loop, operatively associated with the controllable drive source as well as the first and second tachometers, for matching the peripheral speed of the roller to that of the log.

REFERENCES:
patent: 2884966 (1959-05-01), Zilm

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