Direct Part Marking (DPM)

Posted Aug 24, 2010 11:18:33 AM by DecisionPoint Team & filed under

OLYMPUS DIGITAL CAMERAIt’s time for a little bar code 101 again. Today we’re going to take a look at Direct Part Marking (DPM). DPM is a process to permanently mark an asset with a bar code. The preferred codes for DPM are Data Matrix and the QR Code. DPM is commonly used by automotive, aerospace and electronics manufacturers, as well as the United States Department of Defense. DPM is a reliable means of identifying parts and can assist with safety and warranty issues and satisfy regulatory requirements. Permanently marking the asset can be done in several ways, including:

  • Laser marking
  • Dot peening
  • Chemical etching
  • Ink jet printing

There are several factors to consider when deciding how the part will be marked, such as:

  • Part shape-the Data Matrix code is difficult to place on a curved surface
  • Part function-for parts used in critical safety applications it is best to use a non-intrusive method
  • Surface thickness-you don’t want to use intrusive methods on parts that may be weakened due to the marking depth
  • Surface-highly polished surfaces must first be textured to reduce interference with bar code reads

 

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