PID automatic temperature control; control of high precision, small temperature fluctuations. Speed ??control section using pulse width modulation (PWM) steady speed automatic voltage regulator circuit; DC servo motor, the output torque, smooth running. Able to maintain a constant speed when climbing and road load changes. This series welder stable performance, unaffected by the outside temperature, voltage changes. The machine excellent performance, easy operation, high welding speed, welding quality. Technical parameters Input voltage V: 220V Frequency: 50Hz Power P: 800W welding speed V: 0-4m / min heating temperature T: 0-450 ℃ solder material thickness: 0.3mm-2.0mm lap width: 10cm weld width: 12.5mm2 Article intermediate cavity 12mm weld strength: ≥85% base metal (tensile shear direction) Weight: 4.8Kg Insulation class: II Class