Method and apparatus for controlling veneer lathe knife clearanc

Details Method and apparatus for controlling veneer lathe knife clearanc Method and apparatus for controlling veneer lathe knife clearanc

1995-01-18

1996-02-13

Bray, W. Donald

Woodworking

Process

Including monitoring of operation

73579, 73660, 82118, 144209R, 144365, 144211, 144213, 340683, 36447409, B27B 100, B27L 500, G08B 2100

Patent

active

054905486

ABSTRACT:
A method of controlling the clearance angle of a veneer lathe knife in a veneer lathe having a knife holder beam rotatably mounted on a knife carrier. The beam's vibration frequency is continuously measured and compared with a stored representation of a vibration frequency range (about 50-200 Hz.) characteristic of disruption of the veneer peeling operation. If the comparison reveals that the measured vibration frequency is within the characteristic disruptive range, the beam is rotatably adjusted until the comparison reveals that the measured vibration frequency no longer lies within the disruptive range. Usually, the adjustment accelerates lowering of the beam in order to make the knife clearance angle less positive.

REFERENCES:
patent: 4392519 (1983-07-01), Calvert
patent: 4494588 (1985-01-01), Berry et al.
patent: 4558311 (1985-12-01), Forsgren et al.
patent: 4791970 (1988-12-01), Walser et al.
patent: 5143129 (1992-09-01), Toivio

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