SWEISS
WELD.COM
OPERATION
8
The letter “X” stands for duty cycle, which is defined as the proportion of the time that a
machine can work continuously within a certain time (10
minutes). The rated duty cycle means the proportion of
the time that a machine can work continuously within 10
minutes when it outputs the rated welding current.
The relation between the duty cycle “X” and the
output welding current “I” is shown as the right figure.
If the welder is over-heat, the IGBT over-heat
protection unit inside it will output an instruction to cut
output welding current, and brighten the over-heat pilot
lamp on the front panel. At this time, the machine should be relaxed for 10 minutes to cool the
fan. When operating the machine again, the welding output current or the duty cycle should
be reduced
§3.3 Polarity Connection
§3.3.1 MMA operation
workpiece
electrode
DC POSITIVE CONNECTION
Welding holder
workpiece
Welding holder
electrode
DC NEGATIVE CONNECTION
SKY
TIG
SKY
TIG
Choosing the connection of DCEN or DCEP according to the arc stable burning condition.
The different electrodes need different connection method. Please refer to the electrode
manual.
Put the ‘welding mode selection switch’ of the front panel on MMA shelf before doing
MMA welding.
