13
3. Pre-flow gas
Adjustable from 0 - 25 seconds, this enables the backed up gas pressure to be released
from torch before actual arc is started. Common settings for most application is about .3 to
.5 seconds - If welding stainless steel etc sometimes a longer pre-flow is required.
4.
Start Amperage
This allows you to set the initial start current from 5A DC and 10A AC. In 4T mode when
trigger is pressed and held you will remain at start amps, when you let go machine will then
go to main set amps.
Do not set the start amperage too low for tungsten size otherwise you may experience
sluggish / non arc starting. I.E A 3.2mm tungsten is for high range 160+ amps welding, so
you would not need to set start amps at 5. The thicker the tungsten used the higher the
start amperage has to be. We recommend to achieve faster arc starting:-
1.0mm Tungsten - 5 Amps minimum
1.6mm Tungsten - 15-20 Amps minimum
2.4mm Tungsten - 40 Amps minimum
3.2mm Tungsten - 60 Amps minimum
Note:
Start amps is used when using foot pedal as well, so ensure this is set to
above guide.
5.
Up-Slope
Adjustable from 0 - 25 seconds, This allows you to gradually increase the amperage from
start amps to main amps when using torch trigger operation.
When using foot pedal ensure up-slope is set to 0 or you may experience sluggish arc
starting.
6.
Main current control
This adjusts the main welding current and is shown in L.E.D (Fig 4.24) when welding is in
process.
Welding range AC is 10A to 210A
Welding range DC is 5A to 210A
7.
Pulse width adjustment (pulse on time)
When pulse welding you have the main (peak) amperage and base (background)
amperage set. By adjusting the width you determine which will be more prominent, the
pulse or the base. This is adjustable from 5-95%. At a low % the base current will be on
long so you will reduce heat input. At a high % the pulse current will be more prominent so
you will get increased heat input..
8. Pulse amps %
This sets the base amperage as a % of main amps set.
I.E if mains amperage is 120A and you set to 50%, base amps will be 60A
You can use the remote foot pedal and as you depress the pedal and raise the main
