1. Meet the use of circuit boards and general soldering products (with suitable fixtures) 2. Improve welding quality and imitate manual welding 3. Improve production efficiency and can weld batches of products at the same time, which is about 4 times higher than manual 4. The speed is more than 1 times faster than the traditional semi-automatic tinning furnace. Action design: because the empty run accounts for most of the stroke, the empty run speed is increased. Tin scraping and tin immersion are slow, and the tin immersion depth can be set directly on the touch screen, which is more convenient and accurate than the traditional sensor adjustment. 5. It can be set to scrape the tin ash once and immerse n times. (For example, n=3, tinning three times and scraping the tin ash once, n=0, scraping the tin ash once every tinning) As long as the substrate with good flux is placed on the needle rack, and then the foot switch is stepped on, multiple substrates of various types can be welded at one time. From the substrate angled tinning to the horizontal tinning time and the substrate tinning angle, all are controlled by a microcomputer, completely simulating the principle of manual tinning, and personnel do not need training. Anyone can do the tinning operation without skilled hands. The welding quality is stable and the production efficiency can be improved.