Specifications
Smootharc TIG 185 DC
Part No.
BOCDC185
Power Voltage
AC 240V ±15%
Frequency (Hz)
50/60
Rated Input Current (A)
MMA
30.1
TIG
25.6
No-load Voltage (V)
61
Output Current (A)
MMA
10 – 160
TIG
10 – 185
Rated Output Voltage (V)
MMA
26.4
TIG
18
Duty Cycle (%)
60
No-Load Loss (W)
40
Arc Initiation
HF
Efficiency (%)
80
Power Factor
0.73
Insulation Grade
F
Housing Protection Grade
IP21
Weight (kg)
8.4
Dimensions (mm)
430 x 185 x 306
5.0 Technical specifications
4.5.1 For direct current (DC) TIG welding
Select the correct size and type of non consumable
tungsten and shielding gas for the application.
(See selection chart at the end of the application
section.)
For (DC -) (most commonly used polarity) connect
the TIG torch to the negative Dinse plug connector
and the work return lead to the positive dinse
plug connector.
-
+
-
+
GTAW with DCEN produces deep penetration because it
concentrates the heat in the joint area. No cleaning action
occurs with this. The heat generated by the arc using this
polarity occurs in the work thus a smaller electrode can be
used as well as a smaller gas cup and gas flow. The more
concentrated arc allows for faster travel speeds.
For (DC+) applications connect the TIG torch to the
positive dinse plug connector and the work return
lead to the negative dinse plug connector. In this
mode most of the heat is generated within the
non-consumable tungsten and the heat input into
the plate is reduced resulting in lower penetration
depths. Larger tungstens are normally selected for
this application.
Ensure that the MMA/TIG selector switch is in the
TIG position.
4.5.2 For DC Pulse TIG welding
DC welding of thin material can further be
enhanced by using the pulse mode. When using
the pulse mode for DC applications, the current
will be varied between the welding current and
a pre-selected background current. Additionally,
the pulse frequency can be adjusted. By adjusting
the pulse frequency, the optimum heat input for a
particular application can be obtained.
The Smootharc TIG 185 DC has two pre-selected
pulse frequencies. These can be selected by setting
the pulse frequency switch (2) to low frequency
(2Hz) or high frequency (200Hz). As a general rule,
increasing the frequency will increase the heat
input into the plate.
4.5.3 Downslope control
The downslope of the welding current can be
adjusted by adjusting the Down slope Adjustment
Control (7). By increasing the downslope
control time, it allows for better crater filling
characteristics.
BOC Smootharc TIG 185 Operating Manual
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BOC Smootharc TIG 185 Operating Manual