Tweco 252i Fabricator - Manual (Page 36)

FABRICATOR 252i INSTALLATION/SETUP
INSTALLATION/SETUP 3-6 Manual 0-5155
6. Left Knob: Amperage Control (Wirespeed)
WIRESPEED
A
Left Knob
The amperage control knob adjusts the amount of welding
current delivered by the power source. In STICK and LIFT
TIG modes, the amperage control knob directly adjusts the
power inverter to deliver the desired level of output cur-
rent. In MIG mode, the amperage knob adjusts the speed
of the wire feed motor (which in turn adjusts the output
current by varying the amount of MIG wire delivered to
the welding arc). The optimum wire speed required is
dependent on the type of welding application. The setup
chart on the inside of the wire feed compartment door
provides a brief summary of the required output settings
for a basic range of MIG welding applications. The value
may also be adjusted while a weld is in progress – if this
occurs, the left display will briefly switch to show the ad-
justed value as the knob is turned, and will automatically
revert back to showing the weld current measurements
when the knob is not being turned.
7. Right Knob: Multifunction Control - MIG Voltage /
Arc Control (Inductance) & STICK Arc Force
ARC CONTROL
V
Right Knob
MIG Voltage Control
In this mode the control knob is used to adjust the out-
put voltage of the power source. The welding voltage is
increased by turning the knob clockwise or decreased
by turning the knob anti-clockwise. The optimum volt-
age level required is dependent on the type of welding
application. The setup chart on the inside of the wire
feed compartment door provides a brief summary of the
required output settings for a basic range of MIG welding
applications. The value may also be adjusted while a weld
is in progress – if this occurs, the left display will briefly
switch to show the adjusted value as the knob is turned,
and will automatically revert back to showing the weld
current measurements when the knob is not being turned.
ARC CONTROL
V
Right Knob
MIG Arc Control (Inductance)
The arc control operates in MIG mode only and is used
to adjust the intensity of the welding arc. To access the
Arc Control function, push inward on the right knob and
hold it for approximately 2 seconds. This feature can be
accessed and adjusted during welding.
When STICK Mode is Selected
In this mode the multifunction control knob is used to
adjust arc force. Arc force control provides an adjustable
amount of welding force (or “dig”) control. This feature
can be particularly beneficial in providing the operator the
ability to compensate for variability in joint fit-up in certain
situations with particular electrodes. In general increasing
the arc force control toward ‘100%’ (maximum arc force)
allows greater penetration control to be achieved. Arc
force is increased by turning the control knob clockwise
or decreased by turning the knob anti-clockwise. This
feature can be accessed and adjusted during welding.
To access the Arc Control function, push inward on the
right knob and hold it for approximately 2 seconds. This
feature can be accessed and adjusted during welding.
The left display will change to show the Arc Control
parameter name that is in effect for the current MIG or
STICK Modes and the right display will show its present
value. Use the right knob to change the value. When the
desired value is selected, press inward again on the knob
without turning it and release it to exit the Arc Control
function and save the value.
Weld Modes Arc Control Function Left Display Right Display Limits
MIG Inductance INDU 25% (default) 0 – 100 %
STICK Arc Force ARC- / FRCE 50% (default) 0 – 100%
Table 3-2