Commissioning
MMA welding
Item No.: 099-004877-EWM01
71
6.8
MMA welding
6.8.1
Electrode holder connection
There is an open circuit voltage or welding voltage on the G1/4” connecting nipple for shielding
gas (front of the machine). If welding is carried out alternately using TIG and MMA welding and if a
welding torch and an electrode holder are connected to the machine, the open-circuit or welding
voltage is applied simultaneously to both. The torch and the electrode holder should therefore
always be placed on an insulated surface before starting work and during breaks.
Fit yellow insulating cap onto G1/4" connection nipple (shielding gas connection).
Caution: Risk of being crushed or burnt.
When replacing spent or new stick electrodes
• Switch off machine at the main switch
• Wear appropriate safety gloves
• Use insulated tongs to remove spent stick electrodes or to move welded workpieces and
• Always put the electrode holder down on an insulated surface.
Figure 6-4
Item Symbol Description
0
1
G¼“ connecting nipple, welding current "-" (with DC- polarity)
Shielding gas connection (with yellow insulating cap) for TIG welding torch
2
Connection socket, welding current “-” (with DC- polarity)
connection for Electrode holder
3
Connection socket, welding current “+” (with DC- polarity)
Connection for workpiece lead
• Insert cable plug of the electrode holder into either the "+" or "-" welding current connection socket and
lock by turning to the right.
Polarity depends on the instructions from the electrode manufacturer given on the electrode
packaging.
