GYS TIG 168 DC HF Mode D'emploi page 18

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4T Log mode
This mode is the same as the 4T mode but when in welding phase, a short impulse on the trigger allows a shift to a
previously set cold current (20% at 70% of hot welding current).
Nb. : For dual control torches and dual potentiometer
low / cold current « + active potentiometer.
For this mode it may be convenient to use the dual torch option or dual command + potentiometer. The «up» command
keeps the same function as the simple torch command or slip. The «down» command can, when pressed, switch to the
cold current. The potentiometer of the torch, where available, allows control of the welding current (warm and cold)
from 50% to 100% of the value displayed.
Welding options
Pulse
Nb. : Not available in 4T Log.
The pulses correspond to alternative increases and decreases of current (hot current, cold current). The Pulse mode is
used to weld pieces whilst minimising the increase in temperature.
Pulse Mode Settings :
- Cold current (20% at 70% of welding current)
- Welding frequency (from 0.2 to 20Hz)
Nb. : hot and cold current times are the same.
Easy Pulse
Simplified pulse mode. You only set the medium current around which the pulsation will oscillate.
Easy mode determines the welding frequency and hot/cold current.
Spot
This mode is only available in TIG HF 2T.
This function allows spot-welding of work-piece to fix it in place before completing the full weld in TIG mode.
Parameters setting
Pre-gas (0 to 2 sec.)
The pre-gas provides protection for the area where the welding pool will be formed. It also improves
stability when the welding arc is created.
Advice : the longer the torch lead, the longer the time needed (0.15s/Meter of lead)
Up slope (0 to 5 sec.)
Time needed to go from minimum current to welding current.
Welding current setting
The value of the welding current needed depends on the thickness and the type of metal, as well as on the
welding configuration.
Advice : Take 30A/mm as a default setting for DC or 40A/mm for AC and adjust according to the piece to
weld.
Pulse frequency setting (from 0.2 to 20Hz)
The pulse frequency is the number of cycles (½ cycle of hot current, ½ cycle of cold current) made in
a second.
Cold current setting (low intensity) (from 20 to 70% of hot current)
Selected as a percentage of hot current : the colder the current, the cooler the welding piece will stay
during the welding process.
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TIG 168 / TIG 200 DC
1- Press trigger : pre-gas, followed by start. In order to make position-
ning the electrode easier, a low 10 Amp current is supplied, acting like a
light beam. (=Adjust to Ideal Position)
2- Release trigger : up slope to displayed instruction, welding
short impulse : shift to cold current (%I)
short impulse : back to the «hot» current.
3- Press trigger : down slope to low current (for good closure of the cra-
ter)
4- Release trigger : stops the current, post-gas.
command "up / warm current" and command»
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