Feed speed and guide arm control for sawing logs

Details Feed speed and guide arm control for sawing logs Feed speed and guide arm control for sawing logs

1989-07-10

1990-05-22

Bray, W. Donald

Woodworking

Process

Including monitoring of operation

83 768, 83364, 83367, 144378, 250560, B27B 100

Patent

active

049269178

ABSTRACT:
A feed speed control for band saws avoids overfeeding and underfeeding of logs or cants to allow higher initial input feeds and takes into account varying cutting depth throughout a log or cant length. The method comprises the steps of positioning a log or cant in preparation for sawing in a saw line, projecting a first light line onto the surface of the log or cant at the projected saw entry line, and a second light line onto the surface of the log or cant at the projected saw exit line and the second light line to determine depth of cut, and controlling the feed speed of the log or cant during the sawing step past the saw blade, to a predetermined feed speed for the measured depth of cut to avoid overfeeding and underfeeding.

REFERENCES:
patent: 3459246 (1969-08-01), Ottosson
patent: 3842874 (1974-10-01), Noriyuki et al.
patent: 3897156 (1975-07-01), Chasson
patent: 4139035 (1979-02-01), Bystedt et al.
patent: 4458567 (1984-07-01), Tuomaala
patent: 4737031 (1988-04-01), Mahlberg et al.

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