The function and detection principle of SPI solder paste inspection machine
Generally, 80-90% of the defects in SMT patches come from solder paste printing, so is it necessary to set up an SPI solder paste inspection machine after solder paste printing? Brush down, so as to improve the PASS rate after reflow soldering. Now more and more small components need to be soldered, so the quality requirements of solder paste printing are higher. The defect detected after solder paste printing is much lower than the maintenance cost detected after reflow soldering, saving costs, and Easier to repair.
The detection principle of SPI is basically similar to that of AOI. Both use optical images to check the quality. The solder paste checks the flatness, thickness and offset of the solder paste. Therefore, it is necessary to first detect an OK board as a template, and then print in batches. The PCB board is judged based on the OK board. There may be a lot of defective rates at the beginning, but this is normal, because the machine needs to constantly learn and modify parameters and maintain it by engineers.
Baiqiancheng has been focusing on the management and control of the production process, strictly controlling each link of production, and ensuring that the test is correct before shipping to customers. Baiqiancheng pays great attention to the quality of PCBA production. For the introduction of professional SPI testing equipment to ensure the printing quality of solder paste.
