The use of AOI equipment in SMT processing

Shenzhen VIASION Electronic Technology Co., Ltd. is a PCBA processing manufacturer with its own SMT chip factory. The chip factory is equipped with 2 Yamaha fast chip assembly lines, 2 DIP plug-in production lines, and AOI optical detectors. The minimum package can be 0201 yuan Device SMT chip processing service. Next, I will introduce the use of AOI equipment in SMT processing.

The use of AOI equipment in SMT processing

Automated optical inspection is a method that uses optics to capture PCB images to see if components are missing and in the correct position to identify defects and ensure the quality of the manufacturing process. It can check components of all sizes, such as 01005, 0201, and 0402s and packages such as BGAs, CSPs, LGAs, PoPs, and QFNs.

The introduction of AOI enabled the real-time inspection function. With the advent of high-speed, high-volume production lines, an incorrect machine setup, incorrect placement of components on the PCB, or alignment issues can all lead to a large number of manufacturing defects and subsequent rework in a short period of time. The original AOI machine was able to perform two-dimensional measurements, such as inspecting board features and component features, to determine X and Y coordinates and measurements. The 3D system is extended in 2D, adding the height dimension to the equation to provide X, Y, and Z coordinates and measurements.

Note: Some AOI systems do not actually "measure" the height of components.

AOI finds errors early in the manufacturing process and guarantees the quality of the workmanship before the board is moved to the next manufacturing step. AOI helps increase production by providing feedback to the production line and providing historical data and production statistics. Ensuring that quality is controlled throughout the process saves time and money because of material waste, repair and rework, increased manufacturing labor, time and expenses, not to mention the cost of all equipment failures.

AOI machines have 3 key requirements:

1. Detect any errors on the production line and immediately feed back the information to upstream to avoid repeated errors.

2. Adapt to the high-speed function consistent with the tact time so that corrective measures can be taken in time.

3. Fast, easy to program and operate, the detection can be completed in real time, and the detection result is reliable.