Light curtain with machine sensing
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United States of America Patent
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Aug 11, 2015
Grant Date -
May 1, 2014
app pub date -
Oct 29, 2012
filing date -
Oct 29, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
A light curtain for use with a machine, such as a press brake. The light curtain includes a controller which is communicatingly connected to a controller of the machine, and at least one presence detector which is connected to the controller of the light curtain. The light curtain also includes at least one sensor which is configured to sense position and/or speed of movement of a moveable part of the machine, in use, the controller of the light curtain receives feedback from the at least one presence detector as well as from the at least one sensor which is configured to sense position and/or speed of movement of the moveable part of a machine. The controller of the light curtain signals the controller of the machine to operate the machine based on the feedback which is received by the light curtain. Preferably, the at least one presence detector is sequentially programmable to effectively provide blanked-out sections, and the controller of the light curtain uses the at least one sensor to detect when the moveable part of the machine is moving through the blanked-out section, and cause the machine to slow down to a safer speed.
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