Tweco 186 DC Inverter - Manual (Page 38)

INSTALLATION, OPERATION AND SETUP 3-8 Manual 0-5237
186 AC/DC INVERTER INSTALLATION/SETUP
trigger switch must again be depressed and realized, thus eliminating the need for the operator to hold the
torch trigger.
Note that when operating in GTAW (HF and LIFT TIG modes), the power source will remain activated until the
selected down slope time has elapsed
NOTE
This Up Slope operates in (4T) TIG modes only and is used to set the time for the weld current to ramp
up, after the torch trigger switch has been pressed then released, from Initial Current to High or Weld
Current.
Press & hold
Trigger
Weld
Current
High
Current
Down
Slope
Post
Flow
AMPS
TIME
Pre
Flow
Up
Slope
Release
Trigger
Initial
Current
Arc Ignited Arc Terminated
Press & hold
Trigger
Release
Trigger
Crater
Current
A-11410_AB
Figure 3-4
9. Wave Balance / Arc Force Indicator
This indicator light will illuminate when programming Wave Balance (AC HF TIG mode only) or Arc Force
(STICK mode only).
10. Forward Programming Button
Pressing this button will advance to the next step in the programming sequence.
11. Multifunction Control
The multifunction control knob is used to adjust welding current.
It is also used to adjust parameters when in programming mode.
12. Back Programming Button
Pressing this button will go back to the previous step in the programming sequence.
13. AC frequency Indicator
This indicator light will illuminate when programming AC Frequency (AC HF TIG mode only).
14. Purge Button
Press the PURGE button to purge the gas line in LIFT TIG and HF TIG modes. To PURGE the shielding gas
line in LIFT TIG and HF TIG modes press the PURGE button and release. The indicator will illuminate and
shielding gas will purge for a preset period of 15 seconds. (This cannot be adjusted). To stop shielding gas
from purging within this time press the PURGE button and release and the purge indicator will extinguish and
shielding gas will cease.