Design and function
MIG/MAG welding
099-005639-EW501
04.06.2020
29
5.2 MIG/MAG welding
5.2.1 Welding torch and workpiece line connection
On delivery, the Euro torch connector is fitted with a capillary tube for welding torches with a steel liner.
Conversion is necessary if a welding torch with a liner is used!
• Operate welding torches with a liner > with a guide tube.
• Operate welding torches with a steel liner > with a capillary tube.
For connection, observe the operating instructions for the welding torch.
Depending on the wire electrode diameter or type, either a steel liner or liner with the correct inner
diameter must be inserted in the torch!
Recommendation:
• Use a steel liner when welding hard, unalloyed wire electrodes (steel).
• Use a chrome nickel liner when welding hard, high-alloy wire electrodes (CrNi).
• Use a plastic or teflon liner when welding or brazing soft wire electrodes, high-alloy wire electrodes or
aluminium materials.
Preparation for connecting welding torches with a spiral guide:
• Check that the capillary tube is correctly positioned in relation to the central connector!
Preparation for connecting welding torches with a liner:
• Push forward the capillary tube on the wire feed side in the direction of the Euro torch connector and
remove it there.
• Insert the liner guide tube from the Euro torch connector side.
• Carefully insert the welding torch connector with as yet too long a liner into the Euro torch connector
and secure with a crown nut.
• Cut off the liner with a liner cutter
> see 9.5 chapter
just before the wire feed roller.
• Loosen the welding torch connector and remove.
• Carefully chamfer the cut off end of the liner with a liner sharpener
> see 9.5 chapter
and sharpen.
Figure 5-12
Item Symbol Description
0
1
Welding torch
2
Polarity selector plug, welding current cable
Internal welding current cable for central connection/welding torch.
• ----------- Connection socket for “+” welding current
3
Workpiece
