ESAB fabricator 141i Service Manual page 22

ESAB FABRICATOR 141i
1. Power Indicator
The power indicator is illuminated when the Electricity Supply is applied to the Power Source and when the ON/OFF switch
located on the rear panel is in the ON position.
2. Digital Wirespeed/Amperage Meter (Left Digital Display)
This digital meter displays preview Wirespeed in MIG mode only then actual amperage (weld current) once an arc has been
established. It also displays preview amperage in both the STICK and LIFT TIG modes only then actual amperage (weld current)
once an arc has been established.
At times of non-welding, the amperage meter will display a preview value in both STICK and LIFT TIG modes. This value can
be adjusted by varying the Wire speed / Amperage potentiometer (Control No. 3). At times of non-welding, the amperage meter
will preview a wirefeed speed value (Inches Per Minute) in MIG mode only. This can be identified as preview wirefeed speed by
a decimal point at the lower right hand side of the display.
When welding, the amperage meter will display actual amperage (weld current) in all modes.
At the completion of welding, the amperage meter will hold the last recorded amperage value for a period of approximately 10
seconds in all modes. The amperage meter will hold the value until; (1) any of the front panel controls are adjusted in which
case the Power Source will revert to preview mode, (2) welding is recommenced, in which case actual welding amperage will
be displayed, or (3) a period of 10 seconds elapses following the completion of welding in which case the Power Source will
return to preview mode.
NOTE!
The preview functionality provided on this power source is intended to act as a guide only. Some dif-
ferences may be observed between preview values and actual welding values due to factors including
the mode of welding, differences in consumables/gas mixtures, individual welding techniques and the
transfer mode of the welding arc (ie dip versus spray transfer). Where exact settings are required (in the
case of procedural work), it is recommended that alternate measurement methods be utilized to ensure
output values are accurate.
3. Wirespeed/Amperage Control
In MIG mode, the Wirespeed/Amperage control 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 depends upon the material
type and the welding application. The setup chart on the inside of the wire feed compartment door provides a brief summary of
the required settings for a basic range of MIG (GMAW/FCAW) welding applications.
In STICK and LIFT TIG modes, the Wirespeed/Amperage control knob adjusts the amount of amperage (weld current) delivered
to the welding arc by the Power Source. It directly adjusts the Power Source to deliver the desired level of weld current.
4. MIG Gun Adapter (ESAB Style)
The MIG Gun adapter is standard ESAB connection with an 8 pin gun trigger for the Fusion MIG Gun. Connect the MIG Gun by
pushing the MIG Gun connector into the brass MIG Gun Adapter firmly and screw the locking screw in the MIG Gun Adapter within
the Wire Feed Compartment to secure the Fusion MIG Gun in position. Failure to properly lock the Fusion MIG Gun into the MIG
Gun Feedplate will result in the MIG Gun being pushed out of the MIG Gun Feedplate by the MIG welding wire or lack of shielding
gas (porosity in the weld) at the weld zone.
5. Positive Welding Output Terminal
The positive welding terminal is used to connect the welding output of the Power Source to the appropriate welding accessory
such as the MIG Gun (via the MIG Gun polarity lead), electrode holder lead or work lead. Positive welding current flows from the
Power Source via 25mm Dinse style connector. It is essential, however, that the Dinse adapter and male plug are inserted and
turned securely to achieve a sound electrical connection.
CAUTION
!
Loose welding terminal connections can cause overheating and result in the male plug be-
ing fused in the Dinse connector.
OPERATION 4-2 Manual 0-5448