Kemppi MXF 63 Operating Manual

Also see for MXF 63: Quick guide Operating instructions

Kemppi MXF 63 Operating Manual Manual pdf 13 page image

EN2.10 adjustment of pressure armsAdjust the drive pressure to the filler wire with the thumb screws mounted over the pressurearms. Notice the graduated scales indicating load. The load applied should be sufficient toovercome a light braking force applied by hand to the filler wire, as it exits the welding guncontact tip.For smaller diameter and soft filler wires, less feed pressure is required. It should be possible toapply a light breaking force to the filler wire by hand, as it exits the gun contact tip. But slightlymore wire flow restriction should render the drives rolls to slip slightly over the filler wirewithout deforming the wire.NOTE! Excessive pressure causes flattening of the filler wire and damage to coated or cored fillerwires. It also causes undue wear of the feed rolls and increases gearbox load, so reducing servicelife.2.11 adjustment of spool brakeBrake force is adjusted through the hole behind the locking clip. Remove the locking clip byhand, and adjust the tension and pressure to the friction pads mounted inside with a screwdriver. See diagram and location A.AThe load applied varies depending on the size and weight of the filler wire and spool, but alsothe filler wire feed speed set. The heavier the wire spool and the faster the feed speed, thegreater the need to increase the braking load. Adjust the pressure, secure the locking clip, setthe wire feed speed and check that the braking force is enough to ensure the filler wire doesnot spill from the spool on overrun.NOTE! Too much or unnecessary loads can impact welding quality, load and wear to the wire feedsystem.2.12 Burn back timeFastMig electronics controls the burn back time. When welding stops an automatic sequenceensures that the filler wire does not stick to the work piece and that no ball is formed at thewire tip, ensuring reliable re-ignition. This system works regardless of the wire feed speed set.2.13 earth return cablePreferably the earth return cable and clamp should be connected directly to the weldingmaterial.Always use a good quality, 70 mm2 heavy copper cable, and if possible a screw type 600 Aclamp. Ensure that the surface contact to the work piece is clean of metal oxide and or paint.Make sure the clamp is firmly secured.11© Kemppi Oy / 1336