Method of controlling feed in centerless veneer lathe and appara

Details Method of controlling feed in centerless veneer lathe and appara Method of controlling feed in centerless veneer lathe and appara

1995-11-02

1996-10-15

Bray, W. Donald

Woodworking

Process

Including monitoring of operation

144365, 36447409, B27B 100

Patent

active

055642535

ABSTRACT:
The method of the present invention realizes accurate control of the feed rate in a veneer lathe under a centerless condition and improves the productivity of the veneer lathe. After spindles (8a) are moved away and disengaged from the axial ends of a log (11), that is, under the centerless condition, the method of the invention controls the feed rate of a knife carriage (9) based on the current rotating speed of the log (11), which is measured by a speed measuring device (7) engaged with the periphery of the log (11). When a difference between the current rotating speed of the log (11) measured by the speed measuring device (7) and a theoretical rotating speed of the log (11) driven by a peripheral drive system (2) exceeds a preset level, the method of the present invention stops the feeding operation of knife carriage (9) and thereby the veneer peeling operation of the veneer lathe. This structure effectively prevents the lowered productivity of veneers and keeps the veneers free from obvious or conspicuous traces of engagement with the peripheral drive system or cracks due to the insufficient synchronism of the veneer lathe with a subsequent veneer processing apparatus.

REFERENCES:
patent: 4266276 (1981-05-01), Hayashi et al.
patent: 4737904 (1988-04-01), Ominato
patent: 5141038 (1992-08-01), Nakaya
patent: 5333658 (1994-08-01), Albion et al.
patent: 5490548 (1996-02-01), Paranen

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