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Registration control for a label cutoff apparatus

  • US 4,384,500 A
  • Filed: 11/20/1980
  • Issued: 05/24/1983
  • Est. Priority Date: 11/20/1980
  • Status: Expired due to Term
First Claim
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1. A control circuit for an apparatus for cutting individual segments from a moving strip of material, the apparatus having a cutting means, means for driving the cutting means, means for driving the strip of material, means for correlating the means for driving the cutting means with the means for driving the strip of material, means for generating a reference signal representing an actual position for each of a plurality of cuts, and means for generating a scan signal representing a desired position for each of the plurality of cuts, the control circuit comprising:

  • means responsive to the reference signal and the scan signal for generating a phase error signal representing the difference between the actual position and the desired position for an associated cut;

    means responsive to said phase error signal for controlling the means for driving the strip of material to reduce said phase error signal for a subsequent cut;

    means responsive to a predetermined number of said phase error signals exceeding a predetermined value for generating a base speed error signal representing the difference between an average actual length of the segments and a desired segment length; and

    means responsive to said base speed error signal for controlling the means for correlating to reduce said base speed error signal.

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