Lincoln Electric BesterMig 200-S Operator's Manual page 13

Adjusting of Force of Pressure Roll
Force
The pressure arm controls the amount of force the drive
rolls exert on the wire.
Pressure force is adjusted by turning the adjustment nut
[1] of the Figure 6 clockwise to increase force,
counterclockwise to decrease force. Proper adjustment of
pressure arm gives the best welding performance.
WARNING
If the roll pressure is too low the roll will slide on the wire.
If the roll pressure is set too high the wire may be
deformed, which will cause feeding problems in the
welding gun. The pressure force should be set properly.
Decrease the pressure force slowly until the wire just
begins to slide on the drive roll and then increase the
force slightly by turning of the adjustment nut by one turn.
Changing Driving Rolls
WARNING
Turn the input power off of the welding power source
before installation or changing drive rolls.
BesterMig 200-S is equipped with drive roll V0.6/V0.8 for
steel wire and into the package are added rolls V1.0/V0.8.
For others wire sizes, is available the proper drive rolls kit
(see "Accessories" chapter) and follow instructions:

Turn the welding machine off.

Release the pressure roll lever [1].

Unscrew the fastening cap [3].

Change the drive roll [2] with the compatible ones
corresponding to the used wire.
Figure 6

Screw fastening cap [3].

Lock the pressure roll lever [1].
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Gas Connection
A gas cylinder must be installed with a proper flow
regulator. Once a gas cylinder with a flow regulator has
been securely installed, connect the gas hose from the
regulator to the machine gas inlet connector. Refer to
point [1] of the Figure 3.
The welding machine supports all suitable shielding gases
including carbon dioxide, argon and helium at a maximum
pressure of 5,0 bars.
NOTE: When using the GTAW lift process, connect the
gas hose from the GTAW torch to the gas regulator on the
shield gas cylinder.
Welding GMAW, FCAW-SS Process
BesterMig 200-S can be used to welding GMAW and
FCAW-SS process.
Preparation the Machine for Welding
GMAW and FCAW-SS Process.
Procedure of begin welding of GMAW or FCAW-SS
process:

Determine the wire polarity for the wire to be used.
Consult the wire data for this information.

Connect output the gas-cooled gun to GMAW /
FCAW-SS process to Euro Socket [12] Figure 2.

Depending on the using wire, connect the work lead
to output socket [10] or [11] Figure 2.

Connect the work lead to the welding piece with the
work clamp.

Install the proper wire.

Install the proper drive roll.

Make a sure, if it is needed (GMAW process), that the
gas shield has been connected.

Turn the machine on.

Push the gun trigger to feed the wire through the gun
liner until the wire comes out of the threaded end.

Install a proper contact tip.

Depending on the welding process and the type of the
gun, install the nozzle (GMAW process) or protection
cap (FCAW-SS process).

Close the left side panel.

Set welding mode to GMAW [6] Figure 2

The welding machine is now ready to weld.

By applying the principle of occupational health and
safety at welding, welding can be begun.
11
WARNING
English