Tweco A40 CutMaster - Manual (Page 46)

CUTMASTER A40
4T-8 OPERATION Manual 0-4978
35°
Workpiece
Torch Head
Standoff Height
A-00941_AB
Gouging Angle and Standoff Distance
Standoff Distance
The tip to work distance affects gouge quality and depth.
Standoff distance of 1/8 - 1/4 inch (3 - 6 mm) allows for
smooth, consistent metal removal. Smaller standoff dis-
tances may result in a severance cut rather than a gouge.
Standoff distances greater than 1/4 inch (6 mm) may result
in minimal metal removal or loss of transferred main arc.
Slag Buildup
Slag generated by gouging on materials such as carbon and
stainless steels, nickels, and alloyed steels, can be removed
easily in most cases. Slag does not obstruct the gouging
process if it accumulates to the side of the gouge path.
However, slag build - up can cause inconsistencies and
irregular metal removal if large amounts of material build
up in front of the arc. The build - up is most often a result
of improper travel speed, lead angle, or standoff height.