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. Technical parameters 1, the input voltage V: 220V Frequency: 50Hz 2, the power P: 1800W 3, welding speed V: 0.4 ~ 5m / min 4, the heating temperature T: 0 ~ 450 ℃ 5, welding material thickness: 1mm ~ 4mm (single layer film thickness) 6, the weld width: 14mm × 2 intermediate cavity 16mm 7, weld strength ≥85% base metal (tensile shear direction) 8, lap width: 120mm 9, body weight: 13kg