[14]
Note: When welding with remote foot pedal
Upon pressing of foot pedal welding arc will start, if you
find it hard to start arc push pedal down a bit further to aid starting. Press pedal fully to start weld, upon
weld pool formation you can release the pedal to decrease amperage to sustain perfect weld pool and
increase again as required to sustain weld characteristics. The foot pedal adjusts from Start (min)
current to maximum current as set on main current knob on front of machine.
A
dvantage of Remote current control on Torch switch : No need to vary current while starting as well
as operating TIG welding only if welder need variation then only you need to adjust. Foot switch is
needed always to press and foot pressing can not keep current at always the same level may vary as
foot shakes during welding.
Tig tungsten size / amperage guide
All values below are based on using pure argon shielding gas. Other current values may be employed
depending on the shielding gas and application
ELECTRODE RATINGS
Electrode
Diameter (mm)
2% Thoriated on DC (amps)
Red Tip
–
Grind to point
Pure
Tungsten on
DC (amps)
Zirconiated 0.8% Tungsten
on AC (amps) White Tip
–
No need to grind
1.0mm / 0.040‖
5 - 80
30
20 - 60
1.6mm / 1/16‖
40- 150
80
40 - 100
2.4 mm/ 3/32‖
140 - 250
130
80 - 180
3.2mm / 1/8‖
240 - 400
180
160 - 250
4.0mm / 5/32‖
380- 500
240
220 - 320
4.8mm / 3/16‖
500- 750
300
280 - 390
6.4mm / 1/4‖
750 - 1000
400
360 - 525
Welding in STICK MMA (SMAW) Mode
1. Fit MMA electrode holder to + terminal on machine
2. Fit earth lead to - terminal on machine and to work piece
3. Select stick on front panel
4. Place electrode in holder
5. Select desired welding current with selector knob
6. Select desired MMA options, Arc Force, Hot start time and Amps
7. Strike arc and weld
WARNING!
ELECTRIC SHOCK CAN KILL
When machine is switched to MMA mode, output terminals are always live, take care and do not touch
electrode and earth by person at same time, otherwise electric shock will occur.
The foot pedal has no affect on welding current in MMA mode and the gas flow and high frequency
starting circuit is disabled.
NOTE:-
Please refer to
Chapter 6 Front Panel
for selecting and setting all parameters For TIG/MMA
welding.
Summary of Contents for SI-TIG-300
Page 31: ... 28 9 TIG WELDING TORCH DETAILS ...
Page 32: ... 29 ...
Page 33: ... 30 10 ARGON FLOWMETER REGULATOR DETAILS ...
Page 34: ... 31 ...
