AWELCO TIG 210 AC/DC, User Manual, Page: 8 / 44

SETTINGS
Set the main switch located on the back side into “ON” position and LED (16) will light up. Set the welding process selector (13) to TIG AC which is the default mode for this
machine. Choose 2T with welding mode selection button (12). Press the ‘’Gas test’’ button (14) and adjust the gas flow with regulator. Lower gas flow would affect the welding
quality and cause a porous weld while high gas flow results in bigger consumption of gas.
The machine is now prepared for work with its preset welding parameters.
Welding parameter selection is done by pressing the buttons (1, 2) until a LED marks the corresponding position. Once in position adjustment is done by turning the knob (A).
Parameter value is displayed on left display (19). On right display (20) the unit of selected value is displayed.
During welding the two displays (19, 20) show set and actual welding current.
Parameters such as: AC balance, 2T - 4T mode, welding process (AC, DC, MMA) and pulsed / continuous arc are selected or adjusted via special buttons as described in
“Front panel description” chapter.
SECONDARY MENU
Press and keep pressed the A button for 5 seconds to enter the secondary menu. Select the setting parameter by turning the knob. The display on the left side shows the
parameter, the display on the right side shows the value. The setting parameters are:
•
D01: empty
• D02: 2s-5s time of start high voltage
•
D03:
• D04: empty
•
D05: 20A-100A AC arc start current
•
D06: empty
• D07: 20A-100A DC lift arc start current
•
D08: “000” 4T off, “001” 4T on;
• D09: “000” VRD off, “001” VDR on
•
D10: empty
TIG (GTAW) WELDING
After setting the machine as described above proceed to current adjustment (6), welding process starts by pressing the torch button. For normal welding torch must be held at
a certain distance from the welding spot. It is roughly the same distance as tungsten electrode diameter. When placed too close welding material and torch components (such
as welding tip) can burn out.
TIG AC WELDING , is used for welding aluminium, magnesium and their alloys as opposed to TIG DC process used for most other metals. Select ‘’AC’’ current type (25) and
TIG with welding process selection button (13). For fine adjustment of welding parameters there is AC frequency ranging from 35 to 250 Hz on knob (B5) and balance (clean
ratio) on knob (C). Use lower frequency for a softer, wider arc with shallow penetration and high frequency for a more precise arc with deeper penetration. A high frequency
with lower current adjustment is often used for welding thin materials. Balance control allows for shallower penetration with more positive time and deeper penetration with
more negative time – both is expressed when knob (C) is turned. For quick reference the table below describes clean effect:
Rotary knob
Effect
Tight and deep Wide and flat
Current waveform
Tungsten electrode consumption more fewer
In TIG WELDING 4T mode is often used. To activate the 4T function see the SECONDARY MENU – D08. Select the 2T, 4T or 4T with second current with button (12). In 4T
operator does not need to hold the torch button continuously. The button now works as a switch. By pressing it the arc is switched on or off and by holding the button current
remains at start / end current (4, 9). In 4T mode a welding session follows the diagram below:
SPECIAL 4T with second current works in a way similar to normal 4T with a possibility of changing the current during welding. When normal welding current is established tap
the torch button shortly and the current will fall to value set on position (7). Tap the torch button again to rise the current back to normal setting set on position (6). Hold the
torch button and the current will fall to end current value set on position (9). PULSE function not enabled.
SLOPE UP / DOWN (5, 8) time setting allows the operator to start welding with low current to warm up the material and finish welding with a decreasing current. Adjust the
slope up / down time (5, 8) to set the time in which current increases / decreases. Slope up starts after releasing the torch button to achieve main welding current. Current down
slope starts after pressing and holding the torch button to extinguish the arc. In 2T mode the slope up / down setting adjusts the rise / fall from zero to main current.