BOC Smootharc TIG 185 DC Operating Manual - Page 11
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BOC Smootharc TIG 185 Operating Manual
4.0 Connecting your Smootharc TIG 185 DC machine
4.1 Power
The machine is designed to operate on a 240V
± 15% input single phase AC outlet. The machine
is supplied with a heavy duty 15A input plug.
Ensure that there is adequate ventilation around
the machine when it is connected to the mains
power supply.
4.2 Shielding gas
When working the machine in the TIG mode of
welding the process requires a shielding gas.
The shielding gas can be supplied via a pressure
regulator to the machine from either a fixed
installation or single cylinder of gas.
If a cylinder of gas is used, please ensure that the
cylinder is securely fastened (refer to the section
on cylinder handling and safety), before starting
any welding operation.
Refer to the application section for the selection of
the correct shielding gas.
4.3 TIG Torch connection
The Smootharc TIG 185 DC machine is rated at 200A
at 60% duty cycle. The matching TIG torch for this
machine is the BOC AC/DC TIG Pack, or a BOC 26F/
FX TIG torch fitted with a separate contactor
•
The BOC AC/DC TIG pack torch is fitted to the
machine by means of the Safe Lock dinse back
end. For DC (-) TIG operation, fit the torch back
end to the negative dinse connection. Similarly
for DC (+), fit the torch back end to the positive
dinse connection.
•
The gas hose is fitted to the gas fitting (GAS)
located on the front bottom panel of the machine.
•
The contactor lead is fitted to the contactor
control fitting marked
.
4.4 MMA Operation
The Smootharc TIG 185 DC can be used as a MMA
welding machine by fitting an electrode holder and
work return lead to the respective dinse connectors
(dependant on the type of electrodes being used.
Please consult the packaging supplied by the
manufacturer for correct polarities).
When using your Smootharc TIG 185 DC machine in
the MMA mode, ensure that the TIG/MMA selector
switch is in the MMA position.
4.5 TIG Welding operation
The Smootharc TIG 185 DC is fitted with a High
Frequency (HF) start mode. The arc would be
initiated by keeping a distance of 2 – 4 mm between
the workpiece and the tungsten. The HF will be
initiated by depressing the contactor switch.
Once the arc is initiated, the HF will automatically
turn off.
Front panel layout
1
Current meter
2
Pulse frequency switch
3
Power indicator
4
MMA/TIG switch
5
Overcurrent indicator
6
Current selection knob
7
Down slope adjustment
8
Power switch
9
Negative dinse connector
10
Gas output
11
Contactor control
12
Positive dinse connector
1
2
6
7
9
10
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