Design and function
MIG/MAG welding
099-005231-EW501
10.05.2012
39
5.8.4
Changing the wire feed rollers
NOTE
Unsatisfactory welding results due to faulty wire feeding!
Wire feed rollers must be suitable for the diameter of the wire and the material.
• Check the roller label to verify that the rollers are suitable for the wire diameter.
Turn or change if necessary!
• use V-groove rollers with for steel wires and other hard wires,
• use U-groove rollers for aluminium wires and other soft, alloyed wires.
• Slide new drive rollers into place so that the diameter of the wire used is visible on the drive roller.
• Screw the drive rollers in place with knurled screws.
Figure 5-7
5.8.5
Inching the wire electrode
CAUTION
Risk of injury due to welding wire escaping in an unpredictable manner!
Welding wire can be conveyed at very high speeds and, if conveyed incorrectly, may
escape in an uncontrolled manner and injure persons!
• Before mains connection, set up the complete wire guide system from the wire spool to the
welding torch!
• Remove the pressure rollers from the wire feed unit if no welding torch is fitted!
• Check wire guide at regular intervals!
• Keep all casing covers closed during operation!
CAUTION
Extensive wear due to incorrect contact pressure!
Incorrect contact pressure will cause extensive wear of the wire feed rollers!
• With the adjusting nuts of the pressure units set the contact pressure so that the wire
electrode is conveyed but will still slip through if the wire spool jams.
• Set the contact pressure of the front rollers (in wire feed direction) to a higher value!
NOTE
The inching speed is infinitely adjustable by simultaneously pressing the wire inching
button and turning the wire speed rotary dial. The display shows the selected inching
speed.
