AOI System
Even with carefully calibrated production processes, occasional deviations for modules, such as inadequate solder joints or registration errors, cannot be fully eliminated. This is why every component is examined early in the production process and filtered out in ‘case of doubt’.
A system for the automatic optical inspection (AOI system) is an essential building block of Böning’s quality management.
The component to be examined is fed into the AOI system where it is first photographed from different angles. Internally, twelve cameras are used and the images are evaluated with extensive image processing software.
A module’s required properties are extracted from the circuit diagram data or are predefined by reference photographs. Every possible deviation from the target is detected and alerted. The optical inspection is usually applied three times to each module. Separate test runs are designated for SMD-mounting, THT-mounting (wired parts), as well as the bottom of the PCB. The AOI test system has a modular design and it is capable of learning. The facility’s current technical state is secured by continuously enhancing the component library as well as upgrading the software periodically.