Tweco Fabricator 141i Operating Manual - Manual (Page 38)

Fabricator 141i
INSTALLATION, OPERATION AND SETUP 3-8 Manual 0-5145
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
differences 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 (Tweco Style)
The MIG Gun adapter is standard Tweco 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.