Kemppi Minarc Mig Evo 200 Operating Manual

Contents

EN3.2 MAINTENANCE OF THE WIRE FEED MECHANISMParts of the welding gun and wire liner12789 34561 958010110, 112 95910103 9876634 0.6 mm4 9876635 0.8 mm5 9876633 0.9 mm6 9876636 1.0 mm7 95801738 95910799 4153040 45°10 4307650 0.6–1.0 mm (Fe, CuSi)11 4307660 0.6–1.0 mm (Ss, Al)Service the wire feed mechanism at least every time the spool is changed.• Check the wear of the feed roll groove and change the feed roll when necessary.• Carefully clean the welding gun wire liner with dry compressed air.NOTE! When using compressed air pistols, ensure you are wearing adequate safety equipmentincluding, suitable work clothing, gloves and eye protection. Never direct compressed air pistols orthe end of the liner at your skin, face or others in the vicinity.Cleaning the wire linerPressure of the feed rolls remove metal dust from the filler wire’s surface which then travelsin the wire liner inside the gun cable. If the wire liner is not cleaned, it gradually clogs up,increasing drag, impairing wire feed performance and weld quality. Ultimately this will causewire feed malfunctions. Clean the liner in the following manner:1. Remove the welding gun’s gas nozzle, contact tip and contact tip adapter.2. With a pneumatic pistol, blow dry and filtered compressed air through the wire liner.3. Clean the wire feed mechanism and spool housing with compressed air.4. Reassemble the welding gun. Firmly tighten the contact tip and contact tip’s adapter.Replacing the wire linerIf the wire liner is too worn or totally clogged, replace it with a new one according to thefollowing instructions. You should also replace wire liner with a plastic one, if you mainly usestainless steel or aluminium wire.1. Disconnect the welding gun cable from the machine as follows.a. Disconnect the gun's power cable fixing clamp by opening the screws.b. Disconnect the gun's power cable from the machine’s pole.c. Disconnect the connector of the trigger conductors from the machine.d. Open the gun’s mounting nut.e. Extract the gun gently from the machine whereupon all parts come through thecable hole.2. Open the mounting nut of the wire liner, which exposes the end of the wire liner.3. Straighten the welding gun cable and withdraw the wire liner from the gun cable.4. Push a new wire liner into the gun. Make sure that the liner enters all the way into thecontact tip’s adapter and that there is an O-ring at the machine end of the guide.17MinarcMig Evo 200 / © Kemppi Oy / 1110