Changing The Feed Roller Groove; Shielding Gas; Overheating Protection - ESAB Caddy Mig C200i Instruction Manual

5 OPERATION
NOTE!
Remember to use the correct contact tip in the welding torch for the wire diameter
used. The torch is fitted with a contact tip for Ø0.8 mm wire. If you use another
diameter you must change the contact tip. The wire liner fitted in the torch is
recommended for welding with Fe and Ss wires. Change the liner to the PTFE type
for welding Al or Brazing (CuSi). See "Changing the wire liner" section in the
"MAINTENANCE" chapter regarding how to change the wire liner.
5.7.1

Changing the feed roller groove

The power source is delivered with the feed roller set for Ø0.8/1.0 mm welding wire. If you
want to use it for Ø0.6 mm wire you must change the groove in the feed roller.
1. Fold back the pressure arm to release the pressure roller.
2. Switch on the power source and press the torch trigger to position the feed roller so
that the locking screw is visible.
3. Switch off the power source.
4. Use a 2 mm Allen key to open the locking screw about half a turn.
5. Pull the feed roller off the shaft and turn it around. See marking on the side of the feed
roller for suitable wire diameters.
6. Put the roller back on the shaft and make sure it goes all the way in. You may need to
turn the roller to position the locking screw over the flat surface of the shaft.
7. Tighten the locking screw.
5.8

Shielding gas

The choice of suitable shielding gas depends on the material. Typically mild steel is welded
with mixed gas (Ar + CO
(Ar + CO or Ar + O ) and Aluminium with pure argon. MIG/MAG brazing (CuSi) uses pure
2 2
argon or mixed gas (Ar + O
use. In the QSet™ mode (see "QSet mode" section) the optimal welding arc with the gas you
use will be automatically set.
5.9

Overheating protection

Overheating is indicated on the display (2) with error code E4. A thermal overload fuse
protects the unit against overheating by disabling the welding if overheating occurs. The fuse
resets automatically when the unit has cooled down.
0440 001 001
) or carbon dioxide. Stainless steel can be welded with mixed gas
2
). Check the recommended gas for the welding wire you want to
2
- 18 - © ESAB AB 2020