Arc-tec mg-400 tp and mg-500 tp welding machines are new generation thyrister are controlled co2/mag welding machines with a one-knob integrated micro-processor synergic control, which provides synergic control, which provides appropriate voltage for the welding current selected. An inexperienced operator to handle the machine without wastage or re-work is allowed by this feature. The machine delivers a built-in preset voltage programme is delivered by this welding machine to accommodate the amperage [wire-feed speed]. Separate control mode for amperage and voltage,there is a separate control as standard feature. Easy-to-read and precise current/voltage scale indicates adjusted value due to the effect of the gas mixture and wire diameter. The depth of penetration at a constant level is kept by the user friendly and technologically advanced penetration control, even when the tip-to-work distance varies which assures a high quality of welding. Microprocessor controlled instantaneous arc start close to 100% from low to high current allosws instantaneous arc start even at low current, virtually every time. The combination of hot start and wire slow-down start control delivers secured arc start. The after sales service of the equipment is supported by the company`s dedicated `customer care cell` fully supports.