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Metal analyzing plasma CNC cutting machine and associated methods

  • US 10,668,554 B2
  • Filed: 04/29/2019
  • Issued: 06/02/2020
  • Est. Priority Date: 11/14/2016
  • Status: Active Grant
First Claim
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1. A method for analyzing composition of a workpiece being cut by a plasma CNC cutting machine, comprising:

  • capturing light from a plasma arc of the plasma CNC cutting machine in a time window as the plasma arc begins to cut the workpiece, the time window beginning after a time at the beginning of plasma cutting when the plasma has ionized enough metal from the workpiece to give emissions spectra from ionized metal from the workpiece, the time window ending before emissions spectra from the ionized metal from the workpiece is drowned out by interfering spectra from eroded torch and black-body radiation from the workpiece;

    generating spectral data from the light, the spectral data including intensity of particular spectral lines of the emissions spectra from ionized metal from the workpiece; and

    processing the spectral data to generate a determined composition indicative of composition of the workpiece.

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