Yeswelder CT2050 Operator's Manual page 25

TIG Electrodes Specification Reference Table
Material
Material
Thickness
Mild Steel 1/16"
Mild Steel 1/32"
Mild Steel 1/8"
Mild Steel 3/16"
Stainless Steel 1/16"
Stainless Steel 1/32"
Stainless Steel 1/8"
Stainless Steel 3/16"
DC TIG Welding
I
Welding Current
I1
O
Initial
Current (I3): This parameter can be set according to users' own technical requirements.
Ÿ
Initial Current (I1): It is the current when the arc is ignited by pushing the torch trigger, and it should be set according to users'
Ÿ
own technical requirements. If the initial current is high enough, the arc is easier to be ignited. However, it should not be too high
when welding a thin plate, so as to avoid burning through the workpiece during arc ignition. In some operation modes, the current
does not rise but stays at the initial current value to preheat the workpiece or illuminate it.
Crater Current (I5): In some operation modes, the arc does not stop after the current downslope but stays in the pilot arc state.
Ÿ
The working current in this state is called pilot arc current, and it should be set according to users' technical requirements.
Pre-flow Time: It indicates the time from the torch trigger being pushed to the arc being ignited in non-contact mode. Commonly it
Ÿ
should be longer than 0.5s to make sure that the gas has been delivered to the welding torch in normal flow before arc ignition.
The pre-flow time should be increased if the gas hose is long.
Post-flow Time: It indicates the time from the welding current being cut off to the gas valve inside the machine being closed. If it is
Ÿ
too long, it will lead to a waste of argon gas; if it is too short, it will result in the oxidation of weld bead. When in AC TIG or for spe-
cial materials, the time should be longer.
Upslope Time (tr): It indicates the time spent on current rising from 0 to the preset value, and it should be set according to users'
Ÿ
technical requirements.
Downslope Time (td): It indicates the time spent on current dropping from the preset value to 0, and it should be set according to
Ÿ
users' technical requirements.
Tungsten
Amps
Color
Grey, Orange,
55~90
Red, White
Grey, Orange,
90~120
Red, White
Grey, Orange,
95~135
Red, White
Grey, Orange,
140~165+
Red, White
Grey, Orange,
50~80
Red, White
Grey, Orange,
80~110
Red, White
Grey, Orange,
85~120
Red, White
Grey, Orange,
125~165+
Red, White
I2
Upslope
Upslope time
tr
Fig 14 DC TIG Current Change Waveform
Settings Chart
Tungsten Filler Filler Metal
Dia. Metal Diameter
1/16" ER70S-2 1/16"
1/16" ER70S-2 1/16"
1/16"~
ER70S-2 3/32"
3/32"
3/32" ER70S-2
1/16" ER70S-2 1/16"
1/16" ER70S-2 1/16"
1/16"~
ER70S-2 3/32"
3/32"
3/32" ER70S-2
I3
Preset
Downslope
Downslope time
I2: The current rise prosess from I1 to I3
I4: The current decrease prosess from I3 to I5
22
Ceramic
Gaas Flow
Nozzle size
#4 2
#4-5 2
#5-6 10
1/8" #6-7 10
#4 2
#4-5 2
#5-6 10
1/8" #6-7 10
I4
I5
Pilot arc
td
Gas Flow
Rate(SCFH)
11-12
11-12
11-12
13-14
11-12
11-12
11-12
13-14