Reading Permanent Marks in Manufacturing
What Does It Mean to "Read" a Mark?
In manufacturing, "reading" a mark refers to the process of capturing and decoding the information encoded in a permanent mark applied directly to a part or component. These marks (which include 1D barcodes, 2D Data Matrix codes, and QR codes) store critical data such as serial numbers, part numbers, lot numbers, manufacturing dates, and traceability identifiers.
Reading is performed by vision systems that capture the image of the mark and decode its contents. This process involves two steps: the actual scan of the mark and the processing of the mark to extract the encoded data.
Why Is Reading Marks Important?
The ability to reliably read a permanent mark is the foundation of part traceability in modern manufacturing. When marks are read successfully at every stage of production and distribution, manufacturers gain end-to-end visibility over every component, from the moment it's produced to the end of its service life. This is especially critical in regulated industries like aerospace, automotive, medical devices, and defense, where component traceability is mandatory.
When marks cannot be read, the consequences are significant. Unreadable marks cause production line stoppages, rejected parts, compliance failures, and costly manual interventions. In industries governed by standards like MIL-STD-130 (defense), AS9132 (aerospace), and UDI regulations (medical devices), a part with an unreadable mark may be considered non-compliant, regardless of its physical quality.
Common Applications for Reading Permanent Marks
Automotive manufacturing: Data Matrix codes are permanently etched onto engine components, transmissions, and chassis parts. Vision systems read these codes at multiple stations on the production line to confirm part identity and sequencing, ensuring the right component reaches the right assembly.
Aerospace and defense: Components are marked with Unique Identification (UID) codes that are read at every maintenance and inspection checkpoint throughout the part's operational lifetime.
Medical device manufacturing: UDI (Unique Device Identification) marks are read during production, packaging, and distribution to comply with FDA and EU MDR regulations.
Electronics manufacturing: Compact Data Matrix codes on circuit boards and semiconductor components are read by fixed-position vision systems during automated assembly.
Ready to implement reliable mark reading in your manufacturing process?
Reliable mark reading starts with a high-quality, properly applied permanent mark and the right vision system to decode it. Contact Schmidt Marking Systems to learn how our part-marking solutions can help you make and read marks that improves your marking process and reduces waste.