Feed speed and guide arm control for sawing logs
OwnerEberhard Kirbachinventor
Life of this patent
Estimating the term…
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.
Claims9
A method of controlling feed speed of a log or cant while sawing with a saw blade, comprising the steps of,
- positioning a log or cant in preparation for sawing in a saw line on the log or cant,
- 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,
- measuring the distance between the first light line and the second light line on the log or cant to determine depth of cut, and
- controlling the feed speed of the log or cant past the saw blade during the sawing step, to a predetermined feed speed for the measured depth of cut to avoid overfeed and underfeed.
An apparatus for controlling feed speed of a log or cant while sawing with a saw blade, comprising
- means for supporting a log or cant prior to sawing along a saw line,
- projection means for projecting a first light line onto the surface of the log or cant at a saw entry of a projected saw line, and a second light line onto the surface of the log or cant at a saw exit of a projected saw line,
- camera means to measure the projected depth of cut between the first light line and the second light line, and
- control means to control feed speed of the log or cant past the saw blade during the sawing step at a predetermined feed speed for the measured depth of cut to avoid overfeed and underfeed.
Dependencies are inferred from the claim text.