The steps of soldering iron tip eating tin
1. Grinding or wiping: Ordinary heads can first be sanded or filed with a file. The length of grinding is slightly longer than the height of the slope. Be careful until the surface is clean and smooth. Then wipe off with a clean, dry cloth. If it is a longevity head, it cannot be polished or filed, and can only be wiped off with a clean, dry cloth.
2. Eat tin: prepare a small box of rosin (although the solder wire contains rosin, but the amount is too small, it is not easy to eat tin), connect the power plug, wait for a while and the tip of the soldering iron will heat up, dip the tip of the soldering iron into the rosin to estimate Measure temperature. If the rosin can just be melted, it means that the temperature is still low; if the rosin emits white smoke and the soldering iron turns purple, it means that the temperature is too high; only when the rosin can melt quickly and does not smoke a lot, the temperature is the best. When the temperature of the soldering iron tip reaches the optimum level, evenly dip the soldering iron tip with rosin. The soldering iron dipped in rosin should quickly melt the solder wire on the soldering iron frame to make it a large solder point (add a little rosin), and the soldering iron tip is immersed and rotated repeatedly until the polished part of the soldering iron tip is evenly eaten tin.
3. Aging: After tinning the soldering iron tip, the soldering iron should be aged. Aging is to temporarily stop using a soldering iron for soldering, let it continue to be energized and heated for a while, then unplug the power cord, and place it on a soldering iron stand to allow it to cool naturally. Aging can prolong the service life of soldering iron tips and cores, especially new ones. After eating tin and aged soldering iron, it can be used normally in the future.
If it is an electric soldering iron in normal use, before a new round of energized welding, you should also check whether the soldering iron tip is "burned" or "port is incomplete". "Burn to death" means that the tin eating part of the soldering iron tip has been oxidized and turned into a burnt black head, no longer dipped in tin or the ability to dip in tin is very poor; "port incomplete" means that the working surface is deformed or cracked. Both of these situations require re-tinning the tip of the soldering iron.
