Tweco 186-AC-DC User Manual

Page 1
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Thermal Arc 186 AC/DC
Setup Guide
Page 2
Thermal Arc 186 AC/DC Complete System Overview
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186 AC/DC Front Panel Overview
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Digital Meters-
Displays both the pre-set and
actual output current and
voltage of the power source.
Also used to display parameters
in programming mode.
AC/DC Mode, Pulse and Purge Buttons
Process Selection
Button -
Three modes are available,
GTAW (LIFT TIG), GTAW (HF TIG) & SMAW (Stick) modes.
Trigger
Control
Button
Multi Function
Control Knob
Programming Parameter Indicator Lights
Page 4
TIG Torch and Control Modules Overview&
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TIG Torch Contents:
  26 TIG Torch with Long Back Cap
  12.5 ft lead length
  10. 5 in gas hose length
  9.5 in control lead with 8 pin plug and Rigid Head.
  Remote Control Cartridge, Potentiometer with integrated on/off switch (installed).
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Additional switches/controls are interchangeable with the installed control in the TIG torch.
Control module with push button on/off switch only.
Control module with push button on/off switch with roller potentiometer.
Control module with roller potentiometer and integrated on/off switch.
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TIG Setup
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1. Connect the TIG Torch to the negative welding terminal (-). Welding current
flows from the power source is heavy duty bayonet type terminals. It is essential, however, that the male plug is inserted and turned securely
to achieve a sound electrical connection.
2. Connect the work lead to the positive welding terminal (+). Welding current
flows from the Power Source is heavy duty bayonet type terminals. It is essential, however, that the male plug is inserted and turned securely to achieve a sound electrical connection.
3. Fit the welding grade shielding gas regulator/flowmeter to the shielding gas cylinder, then connect the shielding gas
hose from the regulator/flow meter outlet gas INLET on the rear of the 186 AC/DC Power Source. Connect the gas hose from the TIG torch to the gas OUTLET on the front of the
186 AC/DC Power Source.
Page 6
Lift TIG and HF TIG Programming Modes
(Corresponding diagram on following page)
1.  Turn ON the ON/OFF switch located on the rear panel of the
power source.
2.  Press the PROCESS button to select LIFT TIG or HF TIG mode.
3.  Press the MODE switch to toggle between AC and DC welding
output.
4.  The Programming LED's are always active. Press FORWARD or
BACK to cycle through available programming functions.
5.  Use the Multi Function Control to adjust the parameter
selected.
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Page 7
Lift TIG and HF TIG Programming Modes
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Page 8
Lift TIG and HF TIG Programming Modes Cont.
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Range:
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Page 10
Lift TIG and HF TIG Programming Modes Cont.
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Range:
Range:
Page 11
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Page 12
STICK Setup
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1. Connect the Electrode Holder lead to the positive welding terminal (+). If
in doubt, consult the electrode manufacturer. Welding current flows from the Power Source is heavy duty bayonet type terminals. It is essential,
however, that the male plug is inserted and turned securely to achieve a sound electrical connection.
2. Connect the work lead to the negative welding terminal (-). If in
doubt, consult the electrode manufacturer. Welding current flows from the power source is heavy duty bayonet type terminals. It is essential,
however, that the male plug is inserted and turned securely to achieve a sound electrical connection.
3. Select STICK mode with the process selection control7&
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Page 15
STICK Programming Modes Cont.&
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Range:
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Page 16
Setup Chart
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Refer to Setup Chart on top of machine for weld parameters and guidelines
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