GYS MULTIWELD 250T Manual De Instrucciones página 16

- 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 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 66. Welding gasless wire with a stan-
dard nozzle can lead to overheating and deterioration of the torch. It is recommended to use a "No Gas" nozzle, or remove the
genuine 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.
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).
REEL AND TORCH ASSEMBLY (FIG. IV)
This product takes Ø 200/300 mm wire reel (ecological).
• Remove the contact tube and its support (fig. D), and the nozzle (fig. E) from the torch.
Fig A :
• Open the door of the machine.
• Place the reel on the drive pin (3) of the reel support.
• Adjust the reel brake (4) to avoid reel movement tangling the wire when the welding stops. Be careful not to tighten
too much - the reel must rotate without straining the motor.
Fig B :
• The drive rollers included have 2 grooves (0.8 and 1.0). For 0.8mm steel wire, use the V shaped groove.
• For flux cored wire, remove and reverse the roller to use the 0.9mm groove.
• For 0.8mm aluminium wire, remove and replace the roll with a model specifically designed for aluminium with a U shaped groove
(not included).
Fig C :
To select the adjustment of the drive rollers.
• Loosen the drive roller knob (3) as far as possible and insert the wire, tighten the knob again slightly.
• Start the motor by pressing the trigger of the torch.
• Tighten the knob whilst pressing the trigger until the wire starts to move.
ATTENTION: When welding with Aluminium, use the minimum possible pressure to avoid crushing the wire.
• Leave about 5cm of wire out of the torch, then put the contact tube (fig. D), and the nozzle (fig. E) adapted to the wire to be
used at the extremity.
16
MULTIWELD 250T / 320T
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
+
+
4T
6
inductance
7