Method and apparatus for measuring the vibration amplitude on an energy transducer
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United States of America Patent
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Apr 6, 1993
Grant Date -
N/A
app pub date -
Jan 22, 1992
filing date -
Feb 15, 1991
priority date (Note) -
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Abstract
A method, and apparatus for performing the method, for the ultrasonic contacting wired connection of electrical circuits to metallic leadframe strips, which apparatus essentially includes a bonding head with the energy transducer located thereon for feeding to the process point of the leadframe strip and for producing a longitudinal vibration amplitude is supplied with a first voltage, the bonding head is associated a measuring head fixed to a machine base, and the measuring head has an optical/electrical sensor which measures the instantaneous amplitude of the longitudinal vibration of the infeed of the bonding head and determining a correction factor mathematically from the measured quantities obtained, and the first ultrasonic value for the vibration amplitude of the energy transducer is calibrated with the correction factor.
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