To change the wire, please follow the instructions below:
• Loosen the adjusting wheels (FIG 4C-4) to the maximum and push it down, insert the wire, shut the wire feed motor and tighten the adjusting
wheels following the instructions provided.
• Press the trigger on the torch or use the button to activate the motor (11).
• Feed the wire through the torch so that there is approximately 5cm coming out of it and t the appropriate contact tip (FIG 4E), as well as the
nozzle (FIG 4F).
Remarques :
• Choosing an incorrect type/length of liner or contact tip may cause wire feed problems and the motor to overheat.
• The torch connector must also be securely tightened to prevent overheating.
• Check that the wire or the reel are not making contact with the metal body of the machine as this could cause a short circuit.
• In order to prevent the reel from falling, it is important to make sure it is locked in place and the case is shut and locked when the unit
is being used or transported.
STARTING THE UNIT
Power up the unit using switch no.4.
When the machine is activated, the L10 LED lights up (NOMADFEED 330-4) or the display screens activate (NOMADFEED 425-4).
Connect the gas to connector 14 (if required by the welding process in use). The pressure on the circuit must not be higher than 0.5 MPa, 5 bar or
87 psi.
The button no.10 controls the gas ow valve used to purge the air contained in the power supply circuit and in the torch (only on Nomadfeed 425-4).
Using the owmeter on the gas bottle, adjust the gas ow in order to match the wire used.
The button no.11 activates the motor to facilitate the feeding of the wire in the torch.
FUNCTIONING OF THE DISPLAY
Nomadfeed 330-4 :
The LED L05 activates when the unit is overheating.
The LED L06 activates in case of overvoltage.
The LED L07 activates when voltage is detected at the end of the torch.
The LED L10 activates when the unit is switched on.
Nomadfeed 425-4 :
The top screen displays in real time:
- the input voltage to the unit when it is not welding (LED L04 activates)
- the welding voltage during welding (LED L03 activates)
Information regarding the welding voltage can be kept on the screen up to 20s after the welding ends (refer to settings instructions).
The bottom screen displays in real time:
- the welding current (the L02 LED activates)
- the wire feed speed (LED L01 activates)
The current or wire speed information, the measuring unit (m/min or inch/min), or the time they are being displayed can all be changed in the settings.
The LED L05 activates when the machine overheats.
The LED L06 activates in case of overvoltage.
The LED L07 activates when voltage is detected at the end of the torch.
During welding, the machine measures and displays the welding current and voltage. When the welding ends, the average current and voltage values
will be displayed for 20 seconds.
When the operator adjusts the wire speed, the information displayed is replaced by power input voltage and wire speed.
The values may slightly uctuate depending on the welding mode used (short-circuit, globular, spray-arc), the length of the cables or the positioning
of the earth clamp.
UNIT SETTINGS
Wire speed settings:
Adjustable wire speed with potentiometer 5. The selected value is displayed in real time on the bottom display screen (only on Nomadfeed 425-4).
Soft Start function (only on Nomadfeed 425-4) :
When starting the weld, it is possible to select a slower wire speed to get a softer start by placing the switch no.12 on position 1.
When the switch is on position 0, the wire will directly feed at the selected speed. The start will be quicker and possibly more difcult to handle.
CC / CV function:
Depending on the current generator used (current power source or voltage power source), it is possible to select 2 wire speed control modes.
Switch no.13 on position 1 : the CC mode is activated and wire speed is controlled by the welding voltage. This setting is recommended for direct
current generators.
Switch no.13 on position 0: the CV mode is activated and wire speed will be stable regardless of the welding voltage. This setting is recommended
for constant voltage generators.
As standard, it is recommended to use the CV mode.
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