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6.3.3
Operation method
1)
After being installed according to the above method, and the air switch on the back panel being switched on,
the machine is started. Open the cylinder valve, and turn the gas check switch to the "GAS CHECK" position.
Then, there will be gas output. Adjust the flow regulator to get the proper gas flow.
2)
Get the proper arc by adjusting the inductance control knob. Turn the knob anticlockwise to get lower
inductance and harder arc; turn it clockwise to get higher inductance and softer arc. Generally, select harder
arc under lower current, while select softer arc under higher current.
3)
Select proper welding voltage and welding current by adjusting the current control knob and voltage control
knob on the wire feeder.
4)
Select 2T or 4T operation mode. In 2T mode, arc is ignited by pushing the gun trigger, and arc stops by
releasing the gun trigger. In 4T mode, welding can be continued when releasing the gun trigger after arc is
ignited, and at this time, welding instructions should be set by adjusting the current control knob and voltage
Control knob on the wire feeder. When pushing the gun trigger again, the machine enters into crater welding,
and at this time, welding instructions should be set by adjusting the crater current control knob and crater
voltage control knob on the front panel of the machine. The time of crater welding is determined by the time
the gun trigger is pushed again.
5)
1s after the arc stops, the gas supply will be cut off.
6.3.4
Welding procedure
1)
Welding
Set the welding current after the above preparation. Short circuit transition is mainly fit for electrodes
ofΦ1.0~1.6mm, and it is the phenomenon occurring in the condition of thin electrodes, low voltage and low
current. At this time, stable welding, little spatter and beautiful weld bead can be ensured. Set the welding
current according to the figure below. For different working condition, please refer to the welding parameter
table section in this manual.
Electrode Φ (mm)
2)
Welding
The welding quality and productivity should be taken into consideration for the selecting of welding speed. In
the case that the welding speed increases, it weakens the protection effect and quickens the cooling. As a
consequence, it is not good for weld bead shaping. In the event that the speed is too slow, the workpiece will
be burned through, and beautiful weld bead will be unavailable. In practical operation, the welding speed
should not exceed 50cm/min.
3)
Stick-out
The increase of the stick-out can improve the productivity, but too long stick-out may lead to excessive spatter,
wire breaking and unstable welding. Generally, the stick-out should be 10 times as the electrode diameter.
4)
Shield
The protection effect is the primary consideration. Besides, the protection effect of inner-angle welding is
better than that of external-angel welding, so the gas flow in inner-angle welding should be smaller. Less or no
shield gas is needed in FCAW. Refer to the figure below for the specific value of gas flow.
Welding mode
Gas flow (L/min)
6.4 Installation and operation for TIG
6.4.1TIG installation
1)
Connect the TIG torch correctly according to the figure below. Connect the connector of the TIG torch to the
corresponding connector on the machine panel, and tighten it clockwise.
2)
Connect the aviation plug on the TIG torch to the corresponding socket on the machine panel, and tighten it
clockwise.
Insert the quick plug on the earth cable into the "+" quick socket on the machine panel, and tighten it
3)
Current in short circuit transition
Applicable current (A)
0.8
1.0
1.2
1.6
gas
Welding with thin wire
～15
5
SMART MIG 500 MP
current
50～120
70～180
80～350
140～500
speed
flow
Gas flow selecting
Welding with thick wire
～ 0 2
15
Optimal current (A)
70～100
80～120
100～200
140～350
Welding with thick wire
under high current
20～25
setting
selecting
selecting
selecting
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