GYS PROTIG 250 DC TRI Mode D'emploi page 25

User manual
Pulse MMA
This MMA Pulse welding mode is suitable for applications in the vertical up position (PF). The pulse mode keeps the weld pool cold and eases the
transfer of matter. Without the pulse mode, vertical-up welding requires a difficult «Christmas tree» shape triangular movement. With the MMA Pulsed
mode, this movement is no longer required and a simple straight up movement is enough (depending on the thickness of the workpiece). If you wish
to widen your weld pool, a simple lateral movement is enough (similar to standard welding). This process allows greater control during vertical-up
welding.
The pulse frequency is adjusted by pressing and releasing the «F(Hz)» button and then activating the main incremental encoder. Frequency value
increases when the incremental encoder is operated clockwise and decreases when it is operated anti-clockwise. Once the setting is set, it is possible
to press and release again the «F(Hz)» button to re-link the main incremental encoder to the current setting or to wait 2 seconds.
Designation Setting
Percentage of Hot Start 0 - 100 %
Welding current 10 - 220 A
Pulse frequency 1 - 20 Hz
Arc Force 0 - 80 %
MMA - Advanced menu
Additional settings can be accessed in the advanced menu.
These advanced settings are accessed by pressing button «JOB» for more than 3 seconds. The rotation of the main incremental encoder allows
access to the following advanced settings:
Parameter Description
« ASt » AntiSticking
« HSt » HotStart duration
« dcy » Duty Cycle
Cold current/Back-
« Ico »
ground current)
The parameter to be modified is validated by pressing the button «JOB». The advanced settings menu can be exited with «ESC».
Translation of the original
instructions
TIG - HF 2T
TIG - Lift 4T
MMA 4T
LOG
MMA PULSE
The grey areas are not useful for this mode.
Description & advice
The Hot Start is an overcurrent during priming to prevent the wire from sticking to the part to be
welded. It is set in Intensity and Time.
The welding current is adjusted according to the type of electrode chosen (refer to the electrode
packaging).
Pulsation frequency of the PULSE mode.
The incrementation step depends on the frequency range:
Pulse frequency
1 Hz - 20 Hz
The Arc Force is an overcurrent delivered when the electrode or drop comes into contact with the
solder bath in order to avoid sticking.
Setting Standard Pulse
ON/OFF
0 - 2 s
20 % - 80 %
20 % - 80 %
A
V
JOB
s Hz
%
SETUP Press 3"
%
F
(Hz)
Pulse
Spot
MMA Pulse
Incremental step
0.1 Hz
Recommendations
The anti-sticking feature is recommended to safely remove the electrode
in case it is stuck to the metal.
The duration of the HotStart can be adjusted to make the arcing easier
when using difficult electrodes.
Time balance of the hot current (I) of the pulsation
Second welding current known as «cold» welding current
PROTIG 250 DC TRI
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