Infusing lubricants to nozzle of lead screw of coil soldering machine regularly , it can lubricate the lead screw , reduce friction ,prevent it from rusting. In furnace of coil soldering is better to divided into several heating zone , ,there is an pairs of cartridge heater in every zone ,several cartridge heater work at the same time ,make sure it is evenly heating and speed up heating. Tin is easy to be oxidized , it will cause oxide inclusion ,it will impact the soldering looking, the machine have to scrape the oxide every time before soldering . when coil soldering machine works , after dipping the flux , the pin of bobbin should be wet , if directly have it dipped into tin furnace .It will cause smoke, it will impact the thermostatic status of the internal machine .for some high demand product , it have to blow-dry the pin of bobbin before dipping into hot tin furnace. Changing the tin of whole tin furnace of coil soldering machine once per month is sugges...