Soldering machine foot pedal how to step on the foot and lift the foot are out of the tin what is going on

The needle is not right. Soldering machine foot pedal how to step on the foot and lift the foot are out of the tin is mainly out of the tin needle position is not right or the thickness of the needle is not the right group caused by the selection of the appropriate needle, and then adjust the position of the needle can be good. Even tin is generally referred to in the welding process, several neighboring soldering points stick together phenomenon.