AOI is mainly used to detect common PCBA defects such as missing components, wrong components, reversed polarity, component offset, tombstoning, solder balls, and solder bridging.
AOI (Automated Optical Inspection) is a device that inspects printed circuit board assemblies based on optical principles. During PCBA production, AOI equipment uses high-resolution cameras and advanced image processing algorithms to precisely scan and analyze components on the circuit board.
Specifically, AOI can detect the following common defect types:
- Missing components: Ensures that all required components are actually mounted in their designated positions.
- Wrong components: Checks whether component models and specifications match the design requirements, preventing incorrect parts from being installed.
- Reversed polarity: For polarized components such as diodes and electrolytic capacitors, AOI verifies that the polarity orientation is correct.
- Component offset: Detects whether components are mounted in the correct positions to avoid circuit connection problems caused by shifting.
- Tombstoning: Identifies components that have lifted on one end due to poor soldering, which can affect board stability and reliability.
- Solder balls: Detects solder balls generated during the soldering process to prevent short circuits.
- Solder bridging: Detects unwanted solder connections between component leads to ensure proper electrical performance.
By using AOI inspection, PCBA production quality and efficiency can be significantly improved, defect rates reduced, and reliable support provided for subsequent assembly and testing. For non-standard fixtures or mounting components used in AOI inspection stations, Hansheng Automation offers custom machining services based on customer specifications to support consistent inspection positioning and stable operation.
