Tweco 180 Portable MIG - Manual (Page 42)

FABRICATOR 140, 180 OPERATION
Manual 0-4991 4-6 July 20, 2007
!
WARNING
Follow these instructions only after referring to the Safety Instructions and Warnings chapter of this manual,
and the instructions in the Installation chapter
Check List Before Starting
POLARITY – DCEP (Direct Current Electrode Positive) or DCEN (Direct Current Electrode Negative)
WIRE FEED SPEED – 1 to 10
VOLTAGE RANGE SWITCH SETTING – 1 to 4
GAS FLOW RATE – 15 to 25 CFH
ELECTRODE WIRE STICK-OUT – approx 3/8” (10mm)
4.07 Welding Gun Positions
The welding gun should be held at an angle to the weld joint (see Secondary Adjustment Variables in Section 4.08).
Hold the gun so that the welding seam is viewed at all times. Always wear the welding helmet with proper filter lenses.
CAUTION
Do not pull the welding gun back when the arc is established. This will create excessive wire extension (stickout)
and make a very poor weld.
The electrode wire is not energized until the gun trigger switch is depressed. The wire may therefore be placed on the
seam or joint prior to lowering the helmet.
Direction of
Travel
90º
Transverse
Angle
5º to 15º
Longitudinal
Angle
Art: A-05105
Figure 4-4: Butt and Horizontal Welds
Direction of Travel
30º to 60º
Transverse
Angle
10 to 20º Longitudinal
Angle
30 to 60º
Transverse
Angle
10º Longitudinal Angle
Art: A-05106
Figure 4-5: Vertical Weld
5 to 15º
Longitudinal Angle
30 to 60º
Transverse Angle
Direction of
Travel
Art: A-05107
Figure 4-6: Horizontal Fillet Weld
Direction of Travel
30 to 60º
Transverse Angle
5 to 15º
Longitudinal
Angle
Art: A-05108
Figure 4-7: Overhead