GYS MULTIWELD FV 220M Bedienungsanleitung Seite 18

For use with Steel, the gas recommendation is argon + CO2. (Ar+CO2). The proportion of CO2 required will vary depending on
the use. For Stainless Steel, use the combination of 2% CO2. If welding using pure CO2 protection gas, you should connect a gas
preheater on the gas bottle. You may also use a standard 36 V preheater module that can be connected to the 36V power supply
plug located nearby the soldering wire reel behind the lateral door (fig. I-13). Note that this 36V DC power supply is also com-
patible with 36 V AC preheaters. For other specific gas requirements, please contact your gas distributor. The gas flow in steel is
between 8 and 12 liters / minute depending on the environment.
SEMI-AUTOMATIC WELDING FOR ALUMINIUM (MIG MODE)
Set the voltage output and the wire speed according to the thickness of the weld piece, following the instructions/ recommenda-
tions printed on the front of the machine (fig. VII).
The MULTIWELD 250T/320T/FV 220M can be equipped to weld with aluminium wire Ø 0.8 and 1.0 mm (fig. II-B).
The MULTIWELD 400T can be equipped to weld with aluminium wire Ø 0.8 and 1.6 mm (fig. II-B).
For use with aluminium, the gas requirement is pure argon (Ar). For the specific gas requirements please contact your distributor.
The gas flow in Aluminium is between 15 and 25 Litres/minute depending on the environment, and the experience of the welder.
Below are the differences between welding with Steel and Aluminium :
- Specific rollers are needed for welding with Aluminium.
- Adjust the pressure of the drive rolls to prevent the wire being crushed.
- Only use a capilliary tube for welding with Steel or Stainless Steel.
- Use a special Aluminium Torch with a teflon sheath to reduce friction.
DO NOT cut the sheath close to the joint, it is used to guide the wire from the the rollers.
- Contact Tube : Use a special aluminium contact tube specific to the diameter of wire being used.
GASLESS WIRE WELDING
Set the voltage output and the wire speed according to the thickness of the weld piece, following the instructions/ recommenda-
tions printed on the front of the machine (fig VII).
The MULTIWELD 250T/320T/400T/FV 220M can weld gasless wire to 0.9 to 1.2 mm, if the polarity is reversed (fig. III) respecting
a maximum pressure of 5Nm. For parameters of use, please refer to the instructions indicated on page 84. Welding gasless wire
with a standard nozzle can lead to overheating and deterioration of the torch. Use a nozzle special «No Gas» (ref. 072329) or
remove the original nozzle (Fig III).
MIG / MAG SETTINGS PANEL
CONNECTION AND RECOMMENDATIONS
• Connect the earth clamp on the positive (+) or negative (-) terminal depending on the wire type (in general on the -) .
MODE SELECTION AND SETTINGS
Press the left button
modes only available on MIG Mode) .
1. Setting the welding voltage :
Adjust the welding voltage using the voltage setting knob
the work to be carried out. The voltage setpoint is indicated on the left side
display.
2. Setting the wire speed :
Adjust the wire speed using the central knob
be carried out. The speed setpoint is indicated on the central side display.
3. Inductance settings :
Adjust the inductance level using the inductance setting knob
value from MIN to MAX. The lower the inductance level, the harder and more
guiding the arc. The higher the inductance and the softer the arc with little
splatter.
4. Post-Gas (MULTIWELD 400)
Duration of the gas protection after the arc is extinguished. It protects the
workpiece from oxidation.
Set the voltage output and the wire speed according to the thickness of the weld piece, following the instructions/ recommenda-
tions printed on the front of the machine (fig VII).
18
MULTIWELD 250T / 320T / FV 220M / 400T
to select MIG/MAG welding and press the right button
depending on the work to
to choose the trigger modes : 2T or 4T (trigger
depending on
V
MIG
V
, a relative
The black areas are not useful for this mode.
EN
A
m/min
MMA MIG 2T
MMA
MIG
MIG
4
5
3
2
+ +
0 s 1 s
0.5 s
4T
6
inductance
7