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Section 2
Front Panel:
1. Memory. 1-9. Select the channel number desired
with the button, and make desired adjustments
to the welder. When ready to save your settings
press and hold the button for 3 seconds and save
light will flash and indicate it has been saved.
2. Volt/Slope Display. The readout displays MIG
volts that are selected either throug(250S) or
through the manual adjustments made with the
MIG Volt control knob. The function of the Volts
display will change to reflect actual welding volts
during welding. This may reflect a slightly differ-
ent voltage than selected. This is normal and due
to minor variations of arc length, power input
etc. The Volt meter also registers Up/Down slope
as well as arc force setting. The voltage is non
adjustable on the TIG and Stick functions.
3. LED Indicators. These L.E.D. Indicate the cur-
rent status of the machine. The On indicator is lit
anytime the machine is turned on . The Duty
Cycle/Overheat/ Overcurrent light, indicated by
the warning symbol, is lit when the machine has
been pushed to its thermal limits. When this is lit,
welding will be interrupted. It is a dual colored
LED. If it is a (green light) duty cycle issue, the
light will go off and welding will resume when the
welder has cooled. If it is an over current (red or
amber light) the welder will have to be cycled off
and on and the power circuit analyzed. The volt/
amp/second /In/min LED's indicate which func-
tion the digital display is serving during setup and
while welding.
4. Amp/Wire Speed Display. This displays wire
speed while static and amps while welding MIG.
Wire speed is calibrated to read in m/min or in/
min (depending upon country). It displays actual
amp output while welding. While welding in stick
or TIG, amps are displayed while adjusting While
welding, it reads the dynamic amp output of the
machine.
5. 2T/4T Torch Trigger Selector. The torch trigger
function is designed to operate with both MIG
and TIG functions. To operate in 2T mode, the
trigger on either the MIG or TIG torch should be
simply held down. The 4T function operates as a
torch "latch" in MIG mode that locks the MIG
torch on without needing to hold the trigger. To
operate 4T in the MIG mode, simply press the
torch trigger and hold it down until the arc starts.
To lock it on, release the trigger and weld without
holding the trigger down. To stop, the trigger
must be pressed again, and then released after 1-
Setup Guide and component Identification
2 seconds. The 4T function in TIG mode acts simi-
larly, but in conjunction with the up/ down slope
timer. As the torch trigger is pressed for the sec-
ond time, the trigger should be held in until the
downslope timer completes its cycle. The the
trigger may then be released to end the arc. The
unit should always be set in 2T mode for use with
the foot pedal. The slope settings should be
turned all the way down while using the foot
pedal.
6. Process Selector. For the 250S, press to select
TIG, Stick, MIG, Synergic MIG, Spool Gun, or Syn-
ergic Spool Gun operation. For the 200, use to
select for TIG, Stick, MIG, or Spool gun operation.
7. Gas/Slope Selector: This isolates and selects the
parameter that is to be adjusted by the corre-
sponding control knob. (Two of the three control
knobs serve to adjust more than one function).
Gas pre-flow and post flow may be adjusted for
MIG and TIG to allow for better shielding during
starts and stops. Gas flow will delay starts when
the trigger is pressed until the time selected for
the gas to flow has been satisfied. Up and Down
slope may be adjusted for TIG. This sets the pa-
rameters that work in conjunction with the 2t/4t
feature. Make sure that up/down slope is turned
to the minimum setting if using the foot pedal as
it will conflict with foot pedal operation.
8. Wave Form Control. Varies the current rise time
during short circuit MIG operation. This affects
the actual point where the current has risen suffi-
ciently to burn back the wire after the wire has
"short circuited". The point at which it has
burned back is considered the "pinch point".
This is where the wire will begin to once again
melt and transfer. To put it in more practical
terms, the user will see that the wire is sticking
out longer or shorter from the MIG torch before
it burns away, depending upon the exact setting.
This controls spatter, penetration and bead pro-
file. When the wave form is changed from one
extreme to the other, the operator will observe
that the arc is more penetrating at one end or
more fluid on the other end. Bead profile chang-
es will occur as well. A stiffer arc will produce a
deep but narrow profile. A fluid arc will produce
a wider, shallower weld, usually with an im-
proved bead appearance and less spatter. Wave
form control is also known as inductance control,
slope or arc force control (MIG). By changing
the wave form, the user can achieve arc perfor-
mance that is familiar to the operator. The arc
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