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Migatronic PI 250 DC HP Manuel D'instruction page 16

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Start Amp [A%]
Immediately after the arc has been established,
the machine regulates the welding current to the
value stated in the Start Amp parameter. Start Amp is set as
a percentage of the required welding current and is variable
between 1-200% of the welding current. Please note that
values higher than 100% generate a Start Amp bigger than
welding current.
Slope-up [s]
Once the arc has been established, the welding
process enters a slope-up stage during which the
welding current is increased in linear fashion from the value
stated in the Start Amp parameter to the required welding
current. The duration of this slope-up time is variable 0-
20 sec in steps of 0.1 sec.
Second current level
Adjustable from 10 to 200% of welding current. It
is activated in four-times only by pressing and
releasing quickly the torch trigger. Please note that values
bigger than 100% generate a second current bigger than
welding current.
Please note:
The secondary current function will be deactivated at a
current value of 100%.
Slope-down [s]
When welding has stopped by activating the
trigger, the machine enters a slope-down stage.
During this stage current is reduced from welding current to
Final Amp over a period of time called the slope-down time
and variable 0-20 sec in steps of 0.1 sec.
Final Amp [A%]
The slope-down stage is completed when the
current level has fallen to the value stated in the
Final Amp parameter. In 4-times it is possible to continue in
Final Amp mode until the trigger is released. Final Amp is
stated as a percentage of the required welding current and is
variable between 1 - 90% of the welding current.
Post-flow [s]
Post-flow is the period of time for which gas flows
after the arc is extinguished and is variable 0-
20 sec.
Spot time
The spot time in TIG is the time from the end of
slope up to beginning of slope down. Therefore,
during spot time the machine is welding with the adjusted
current. The LED flashes on and off when the function is
active.
Amp
slope-up
Set welding
current
Set the timer before igniting the arc. The torch trigger,
depending from the selected torch mode can interrupt the
spot welding time. Variable 0,01-20 sec: steps of 10 msec up
to 0,5 sec, over in steps of 0,1sec. The function is
disconnected when the time is set to 0 sec. When used
during tack welding, the timer can be set from 0.01 sec to
2.5 secs (See TIG-A-TACK).
current. It is possible to adjust:
Pulse time
Adjustable from 0.01 to 10 sec. in steps of
0.01 sec.
Pause time
Adjustable from 0.01 to 10 sec. in steps of
0.01 sec.
Base amp
Adjustable from 10 to 90% of the pulse current.
current. It is possible to adjust:
Pulse frequency
Variable 25 - 523 Hz.
Base amp
Adjustable from 10 to 90% of the pulse current.
Synergy PLUS
The machines automatically and dynamically adjust
all overall pulse parameters during welding, when
the peak welding current has been set by encoder.
16
spot
welding time
slope-down
trig down ( ) / up ( )
Slow pulse
Is used for selection of slow pulse. The
pulse current is equal to the set
Fast pulse
Is used for selection of fast pulse. The
pulse current is equal to the set
TM
(TIG DC)
time

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Pi 200 dc hp