Patent ID: 6393336
Filing Date: 2002-05-21
Classification: G01L

Abstract:
A nozzle clogging detection device for an electronic component-mounting apparatus including a vacuum nozzle for picking up an electronic component by vacuum, said vacuum nozzle having a nozzle hole, vacuum means for drawing air via said nozzle hole of said vacuum nozzle, and a vacuum passage communicating between said vacuum means and said nozzle hole of said vacuum nozzle, the nozzle clogging detection device for detecting clogging of said nozzle hole of said vacuum nozzle and erroneous mounting of said vacuum nozzle, and comprising:a vacuum valve arranged across said vacuum passage for switching between said vacuum passage communicating with said vacuum means and a nozzle hole-opening passage for opening said nozzle hole to the atmosphere, flow rate measurement means arranged across said vacuum passage for measuring an actual flow rate of air drawn in through said nozzle hole; and nozzle clogging detection means for detecting clogging of said nozzle hole and erroneous mounting of said vacuum nozzle, by comparing said actual flow rate measured by said flow rate measurement means with a design flow rate of air to be drawn through said nozzle hole, said design flow rate of air being stored in advance.