Electrode Holder Connection; Connection For Workpiece Lead; Tig Welding; Connecting A Tig Welding Torch With Rotating Gas Valve - EWM PICO 230 Operating Instructions Manual

Commissioning

TIG welding

6.8.1.2

Electrode holder connection

Caution: Risk of injury from crushing!
Suitable protective gloves should be worn when changing spent stick electrodes.
When pausing work, always place the electrode holder on an insulated surface.
• Insert cable plug on the electrode holder into the welding current socket "
the right.
Polarity depends on the instructions from the electrode manufacturer given on the electrode
packaging.
6.8.1.3

Connection for workpiece lead

• Insert cable plug on the workpiece lead into the welding current socket "
to the right.
Polarity depends on the instructions from the electrode manufacturer given on the electrode
packaging.
6.9 TIG welding
6.9.1

Connecting a TIG welding torch with rotating gas valve

When pausing work, always place the welding torch on an insulated surface.
Prepare the welding torch according to the welding task in hand (see torch operating
instructions).
The welding torch shielding gas is supplied directly from the shielding gas cylinder.
• Fit the tungsten electrode and gas nozzle onto the welding torch (observe current load, see torch
operating instructions).
• Insert the welding current plug in the "-" welding current connection socket "
the right.
For machines with pole reversal switch (PWS), the welding current polarity is changed as follows
after selecting "TIG welding process":
• Electrode holder connection socket = welding current polarity "-" ,
• Workpiece lead connection socket = welding current polarity "+".
6.9.2

Shielding gas supply (shielding gas cylinder for welding machine)

No dirt must be allowed to enter the shielding gas supply, as this would cause blockages in the
shielding gas supply. All shielding gas connections must be gastight.
Place shielding gas cylinder in the retainer provided for it and secure with chains.
•
• Before connecting the pressure reducer to the gas cylinder, open the cylinder valve briefly to blow out
any dirt.
Mount the pressure reducer onto the gas cylinder valve.
•
• Screw the gas hose of the welding torch tightly to the pressure regulator.
Slowly open the gas cylinder valve.
•
Open the rotating valve on the welding torch
•
• Set the required amount of shielding gas on the pressure reducer, about 4 - 15 l/min depending on the
current strength and the material.
Rule of thumb for gas flow rate:
Diameter of gas nozzle in mm corresponds to gas flow in l/min.
Example: 7 mm gas nozzle corresponds to 7 l/min gas flow
Before each welding process, the rotating valve must be opened; after the welding process, it
must be closed.
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Item No.: 099-002032-EWM01