AOTAI ARC400 - Page 56

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Fig. 8-3-6: 4-step operation mode
7. “Remote control/ Panel control” switch
It is used to connect to the wire remote controller with remote control cable, then user can adjust welding current,
arc force current on “Remote control” mode. It is convenient to realize welding control in extended distance.
8. “Welding current” regulation knob
It is used to adjust welding current on panel control mode.
Preset proper welding current according to work piece thickness, groove shapes, welding position, wire diameter,
etc. Welding current decides welding seam depth and wire molten rates.
9. “Arc force current/ Down-slope time” regulation knob
It is used to adjust arc force current under SMAW or crater filler time on TIG.
SMAW mode: when welding, short circuit between wire and work piece may occur because of operation or droplet
transfer. In order to avoid short circuit or wire stick, when arc voltage is low, increase current to shorten the droplet
transfer time.
TIG mode: down slope time is time from welding current to crater filler current. Prolong this time can decrease heat
on crater filler mode, reduce the temperature of welding seam tail, reduce gas hole or sinkhole problems caused
by temperature drop, and decrease crater filler hole.
10. Start current regulation knob
It is used to adjust arc starting current under SMAW mode.
Before start arc, work piece is on cold state, increase arc start current so as to improve heat input, which makes
the arc start easier.
11. Positive output terminal (+)
It is used to connect with electrode holder via welding cable on SMAW mode, connect to work piece via ground
cable on TIG mode, connect to the gouging torch on gouging.
12. Remote control cable/ TIG torch cable socket
It is used to connect to the wire remote controller with remote control cable to adjust welding current, arc force
current or down-slope time when it is on the “Remote control” mode, used to weld in extended distance.
To weld in normal distance on TIG, it is used to connect TIG torch's control cable directly.
13. Negative output terminal (-)
It is connected to work piece via ground cable on SMAW mode and Gouging, connected to TIG torch welding cable
on TIG mode.
14. Gas outlet
Connect to TIG torch gas hose.
t
I
0
PRE-GAS CURRENT
DOWN-SLOPE
POST-GAS
UP-SLOPE