What Is an AOI Inspection Machine? Definition & Benefits | SMTFullLine
What Is an AOI Inspection Machine?
An AOI inspection machine (Automated Optical Inspection) uses cameras and image processing to check PCBs for assembly defects after solder paste printing or reflow soldering. It is essential for maintaining high yield in SMT production. SMTFullLine supplies AOI systems for both benchtop and inline use.
What AOI Detects
| Defect Type | Examples |
|---|---|
| Component issues | Missing, misaligned, wrong polarity, incorrect component |
| Solder issues | Bridging, insufficient solder, cold joints |
| PCB issues | Solder mask scratches, contamination |
Types of AOI Machines
Offline AOI – Manual loading, suitable for low volume or lab use.
Inline AOI – Conveyor integrated, automatic board handling for high volume.
2D vs 3D AOI – 3D adds height measurement for lifted leads or solder shape.
Benefits of AOI
Faster and more consistent than human inspection
Data collection – Tracks defect trends for process improvement
24/7 operation without fatigue
SMTFullLine’s AOI Offerings
We offer entry‑level offline AOI (ideal for small batches and prototyping) and high‑speed inline 3D AOI for production lines. All systems include defect library and reporting software.
Catch defects before they ship.
Explore AOI options at SMTFullLine.com.
E-mail*
*