[18]
K. End Amperage
This allows you to set the end current from 5A DC and 10A AC. In 4T mode when
trigger is pressed and held the second time you will remain at end amps, when you let go machine will
then stop welding.
L. Post Flow Gas
Adjustable from 0 - 50 seconds. When you stop welding the gas will continue to flow
for this set amount of time, this allows the tungsten to cool without getting contaminated and also
protect the weld bead until it has cooled slightly. For up to 100 amps use about 8 seconds, for 100 -
150 use 12 seconds and 150-320 use15 seconds.
5. Process selector :-
A) HF Tig - For automatic arc starting (normal setting for AC & DC Tig Welding)
B) Lift Tig - If welding near sensitive electronic devices (car ECU etc) DC Only Stick - NON VRD -
Normal 70v OCV is present before welding happens Stick - VRD (Voltage reduction device).
The
OCV is reduced to below 20V (+/- 3v) for added safety. Once the electrode touches work piece the arc
is established and weld carries on as normal. However when using VRD sometimes it can be harder to
strike the arc and you may need to scratch the electrode on work a bit more, even more so with rusty /
dirty metals. When welding with VRD you may notice a slight delay in the initial striking, this is normal.
C) STICK WELDING :
ARC welding Process is Selected . Adjust all Arc welding parameter after
selecting this function. OCV is same as of Power source.
D) STICK WITH VRD :
Same procedure of ARC (Stick) Welding with Advance feature VRD : Voltage
Reduction Device ,This eliminates the risk of Shock due to High OCV.
6. Parameter adjustment Knob :
Turn this knob to adjust parameter values, if you hold the
knob in and turn it increase adjustment speed.
7. (a) MMA Arc Force control
This controls the arc response to when electrode is held close/away
from work piece. Arc force automatically adjusts by changing the volts / amps to maintain a stable arc.
This is represented as a % of available arc force amperage
7.(b) MMA Hot Start time
Adjusts the time from 0 - 2 seconds that the hot start will happen at
beginning of weld. This helps to reduce electrode sticking to work.
7.(c)MMA Hot Amps %
For controlling the amount of extra amps when the arc is first started and
prevents the electrode sticking to work. Adjustable from 0 - 100% of hot start amps available.
8. Tig Pulse mode selector
This machine has two pulse modes.
Standard pulse works in both AC and DC modes
Advanced AC pulse works only in AC mode
Pulse is used to help control the amount of heat going into work piece and commonly used on stainless
steels and alloys. It standard mode AC, both the pulse peak and base amperage are AC In standard
mode DC, both the pulse and base amperage are DC In advanced AC pulse mode, the machine
pulses between AC and DC- and is ideal to control the heat input on thin alloys.
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 ...
