Method and apparatus for controlling veneer lathe knife clearance angle
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United States of America Patent
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Feb 13, 1996
Grant Date -
N/A
app pub date -
Jan 18, 1995
filing date -
Jan 18, 1994
priority date (Note) -
Expired
status (Latency Note)
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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.
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