EWM Tetrix 300 - MMA Welding; Connecting the Electrode Holder and Workpiece Lead; Select Welding Task

Design and function
MMA welding
66
099-000121-EW501
29.06.2015
5.10 MMA welding
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.
Shielding gas connection!
During MMA welding open circuit voltage is applied at the shielding gas connection
(G¼" connecting nipple).
• Place yellow insulating cap on the G¼" connection nipple (protects against electrical
voltage and dirt).
5.10.1 Connecting the electrode holder and workpiece lead
Polarity depends on the instructions from the electrode manufacturer given on the electrode
packaging.
Figure 5-36
Item
Symbol
Description 0
1
Electrode holder
2
Connection socket, “-” welding current
Workpiece lead or electrode holder connection
3
Workpiece
4
Connection socket for "+" welding current
Electrode holder or workpiece lead connection
5
G¼” connecting nipple, “-” welding current
Shielding gas connection (with yellow insulating cap) for TIG welding torch
• Fit yellow protective cap onto G¼" connecting nipple.
• Insert cable plug of the electrode holder into either the "+" or "-" welding current connection socket and
lock by turning to the right.
• Insert cable plug of the workpiece lead into either the "+" or "-" welding current connection socket and
lock by turning to the right.
The welding current polarity can be reversed on the machine control
"- See 5.10.3 Welding current polarity reversal (polarity reversal) chapter".
5.10.2 Select welding task
Operating
Action
Result