English
7
English
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
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.
Inserting Electrode Wire into Welding
Torch
Turn the welding machine off.
Depending on welding process, connect the proper
gun to the euro socket, the rated parameters of the
gun and of the welding machine should be matched.
Remote the nozzle from the gun and contact tip or
protection cap and contact tip. Next, straighten the
gun out flat.
Turn the welding machine on.
Depress the gun trigger to feed the wire through the
gun liner until the wire comes out of the threaded
end.
When trigger is released spool of wire should not
unwind.
Adjust wire spool brake accordingly.
Turn the welding machine off.
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).
WARNING
Take precaution to keep eyes and hands away from the
end of the gun while the wire is being come out of the
threated end.
Changing Driving Rolls
WARNING
Turn the input power off of the welding power source
before installation or changing drive rolls.
BESTER 190C MULTI
is equipped with drive roll
V0.6/V0.8 for steel wire. 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].
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.
WARNING
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
BESTER 190C MULTI
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 [10] Figure 2.
Depending on the using wire, connect the work lead
to output socket [8] or [9] 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.