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Tool monitor and assembly qualifier

  • US 6,055,484 A
  • Filed: 04/20/1999
  • Issued: 04/25/2000
  • Est. Priority Date: 09/17/1997
  • Status: Expired due to Term
First Claim
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1. A system for monitoring an electrically driven tool having a forward or reverse current flow through the tooling comprising:

  • a current transducer for measuring and converting the forward and reverse currents into electrical signals representative the measured currents;

    means for electrically computationally processing the electrical signals into other signals representing at least one parameter corresponding to a condition of the tool being monitored which is a function of the current, wherein the means for electrically processing the signals includes a programmable microprocessor configured to identify a portion of the signals representative of the current corresponding to the parametera means for displaying the parameter;

    wherein the programmed microprocessor is configured to identify a portion of the signals representative of the currents of the tool driving a fastener to its target torque and successfully completing a cycle; and

    wherein the programmed microprocessor is configured to count a completed cycle, store the count and generate signals when the measured current is the same as the identified and stored parameters.

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