Origin detection method for component placement head
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United States of America Patent
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Nov 13, 2007
Grant Date -
Jan 12, 2006
app pub date -
Sep 11, 2003
filing date -
Sep 13, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
An origin detection method for a component placement head includes setting an axial origin for each elevation nut section, of the component placement head, by detecting a rotational angle of a drive section corresponding to the elevation nut section. The elevation nut sections are then individually moved down from the axial origin so that light emitted from a light-projecting section is received by a light-receiving section without being interrupted. Then, it is confirmed that the axial origin of each elevation nut section is an origin of elevation by detecting interruption of light, emitted from the light-projecting section, by the elevation nut section at a position corresponding to the elevation nut section having been lowered from the axial origin by a prescribed light interruption dimension.
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