SPI/AOI Spare Parts & Calibration Field Guide 2026
AOI false calls climbing, SPI data quietly drifting, defect detection dropping off a cliff — nine times out of ten, the SPI or AOI itself is healthy and the problem is a worn-out part or a missed calibration. This 2026 field guide gives working SMT engineers the spare-parts replacement thresholds and calibration rhythm for projection and ring LED light sources, CCD cameras, squeegees, conveyors, and PCB fixtures, plus a wall-ready maintenance table and a three-step on-site SOP drawn from 22 years of Merex field engineering across 400+ SMT factories.