Cutting machine and method for controlling head moving device of same
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United States of America Patent
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Apr 24, 2012
Grant Date -
Jul 23, 2009
app pub date -
Feb 14, 2007
filing date -
Mar 29, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A cutting machine secures safety of a worker during movement of a head without lowering production efficiency. When moving a cutting head without cutting material to be cut upon a table, a moving truck and the cutting head are moved at a higher speed as compared with when cutting the material to be cut. If, when the moving truck and the cutting head are moving at high speed, a worker who is present upon the table intercepts either of light beams which are located in front of and behind a horizontal beam, then this movement speed is decelerated to a safe low speed, but the task of cutting the material is not interrupted. Subsequently, when the worker approaches the horizontal beam closer, and contacts a wire or a bar in the vicinity of the horizontal beam, movement of the moving truck and the cutting head is forcibly stopped.
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