Types of SMT production lines
SMT production line can be divided into two types, according to the degree of automation can be divided into automatic production lines and semi-automatic production lines; in accordance with the size of the production line can be divided into large, medium and small production lines.
Automatic production line refers to the entire production line equipment are fully automatic equipment, through the automatic board machine, buffer cable and unloading machine all the production equipment with a production line;
Semi-automatic production line is the main production equipment is not connected or not fully connected, the press is semi-automatic, the need for manual printing or manual loading and unloading PCB.
SMT production line of the main components are: by the surface assembly components, circuit boards, assembly design, assembly process;
The main production equipment, including printing presses, dispensers, placement machines, reflow soldering furnace and wave soldering machine. Auxiliary equipment, testing equipment, repair equipment, cleaning equipment, drying equipment and materials storage equipment.
The importance of SMT testing
SMT inspection is an important step in improving the quality of SMT products, it can improve product quality, and strive to achieve "zero defect."
The cost of assembling to the instrument and finding the fault is several times the cost of finding the fault when assembling the printed circuit board;
And the cost of finding the product after the product is put into the market will be hundreds of times the cost of finding the fault when assembling the printed circuit board.
In order to ensure the quality of SMT products, it is necessary to carry out effective testing, timely detection of defects and failures and repair, thereby effectively reducing the manufacture of products and failures caused by the cost of repair.
ICT tester
ICT is In Circuit Tester English abbreviation, the Chinese meaning is the online tester, is the modern electronic enterprise essential PCBA (Printed Circuit Board Assembly, printed circuit board assembly) production of test equipment.
ICT use, high accuracy of the measurement, the detection of the problem clear, even if the general level of electronic technology workers to deal with the problem of PCBA is also very easy.
The most basic instrument used for electrical testing is the On-Line Tester (ICT), which uses a component-level test method to test each component on the assembled circuit board.
ICT can be divided into needle bed ICT and flying needle ICT.
Flying needle ICT basically only static test, the advantage is no need to make fixture, the program development time is short.
Needle-type ICT can be simulator function and digital device logic function test, high failure rate.
In the SMT production line, the time on behalf of the efficiency.
The use of ICT can greatly improve production efficiency and reduce production costs, online tester detection failure coverage of up to 95%, its reasonable configuration in the production line can be found as soon as possible manufacturing failure and timely maintenance, or timely adjustment of the production process, Effectively reducing the cost of manufacturing defective products and repairing.
