INTIG 401 PULSE
DC Pulse Argon Welding Machine
7.2 Press the “Gas control” key, the “check gas” indicator lights on, adjust the
argon gas flow according to different welding technology, then press “gas
control” key again and the “automatic” indicator lights on;
7.3 Set the “pulse on/off” according to different welding technology, press the
“Pulse current” key to do that. If choose “pulse off”, set the welding current by
adjusting the encoder; if choose “pulse on”, set the “peak current”, “PWM
ratio”, “Pulse frequency” and “base current”, press left/right selection key to
choose the parameters need to be set;
7.4 Set the “gas pre-flow time”, “arc starting current”, “Up-slope time”, “down-
slope time”,”crater current” and “gas post-flow time” according to different
welding technology;
7.5 Welding operation:
7.5.1 Two steps: take the tungsten electrode close to the work-piece about
1~3mm, press the welding torch switch without loosen, it starts weld
normally after current up-slope, when finish welding, loosen the welding
torch switch, the current down-slope to crater current. After welding,
please don’t take away the welding torch at once, should wait the gas
post-flow time finish, to protect the weld crater and tungsten electrode;
7.5.2 Four steps: take the tungsten electrode close to the work-piece about
1~3mm, press the welding torch switch without loosen, after arc striking,
find the welding position, then loosen the welding torch switch, the
welding current will increase to the set current, it starts weld normally ,
when finish welding, press the welding torch switch again, the current
down-slope to crater current, loosen the torch switch, arc stop and the
welding finish. After welding, please don’t take away the welding torch at
once, should wait the gas post-flow time finish, to protect the weld crater
and tungsten electrode
7.6 MMA: connect the work-piece too “+’”-” according to different welding
technology; after connecting the ground cable and electrode holder, set the
welding current/arc force current/hot starting current according to electrode
diameter; before welding, the welding machine output 20V
～
28V DC voltage,
when the instant moment that electrode touch the work-piece, the welding
machine output welding current and start the normal welding, after arc stop,
the open circuit voltage will remain 1 second.
8
Maintenance
For safety, the welding machine should be maintained and checked regularly, when
check the inner or outside connecting terminals, do cut off the power distribution
box( or the breaker).
1.1 Daily notes:
1.1.1 Check if there is any abnormal voice, vibration or smell;
1.1.2 Check if there is abnormal heating on the joint of cables;
1.1.3 Check if the cooling fan working well;
1.2 Checking items in 3~6 months period:
1.2.1 The electrical connection: check the fastening screws on cables, to find if
there is any loosen, rust or poor connecting and so on;
1.2.2 Grounding cable: check if the welding machine is grounded well
1.3 Clean the dust inside the machine: this work should be done every half a year,
with dry compressed air.
Adjust the high frequency: never touch the spark electrodes (the distance of the
spark electrodes should be 1mm), when the electrode surface is rough or polluted,
polish it. Before touching the electrodes, please discharge them, and then adjust
the distance to 1mm.
9
Trouble shooting:
Problem
Possible reasons
Trouble shooting
1. When machine
energized,
the
circuit breaker trip
Three phase bridge rectifier
was may damage
Replace the rectifier
；
IGBT damage
Replace IGBT
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