10 Considerations for Direct Part mark Identification: Accurate DPMI requires manufacturers to carefully assess processes, devices, and environment for reading the marks

摘要

Many discrete manufacturers ensure quality control over production processes by directly marking parts with machine-readable codes and tracking those parts through their life cycle. This process is known as direct part mark identification (DPMI). Fast, accurate, and reliable DPMI is a challenge because codes can be difficult to read because of low contrast, variations in part surfaces, and partial damage from process and environmental conditions. If a code is unreadable, the part is not processed, production may stop, and an automated machine may go down.