Reading codes on both sides of panelized PCBs

On electronic component mounting lines, traceability management using printed circuit boards (PCBs) is key to improving quality. For multi-layer boards in particular, it is necessary to accurately read the 2D codes printed on both sides of the board as it passes through processes like reflow soldering. However, when installing code readers above and below the conveyor, space constraints, ink bleeding due to heat, and reading errors from transport vibrations were major challenges.

The solution to this is the double-sided code reading solution utilizing the KEYENCE AI-powered code reader, SR-X Series. Its industry-leading compact body allows for easy installation from above and below even in the narrow gaps of a conveyor, making it easy to retrofit to existing production lines. The latest AI-powered reading algorithm instantly decodes microscopic DataMatrix codes printed with DPM (direct part marking) and even challenging codes affected by heat. Combined with its wide field of view and long-range performance, it is robust against board misalignment and achieves stable reading without sacrificing takt time. This dramatically improves the accuracy of production management in electronics manufacturing and contributes to building a complete traceability system.