Tweco 42 CutMaster Operating Manual - Manual (Page 22)

CUTMASTER 42
OPERATION 4-8 Manual 0-5141
Right Side
Cut Angle
Left Side
Cut Angle
A-00512
Side Characteristics Of Cut
To make a square - edged cut along an inside diameter of a
circle, the torch should move counterclockwise around the
circle. To keep the square edge along an outside diameter
cut, the torch should travel in a clockwise direction.
Dross
When dross is present on carbon steel, it is commonly
referred to as either “high speed, slow speed, or top dross”.
Dross present on top of the plate is normally caused by
too great a torch to plate distance. "Top dross" is normally
very easy to remove and can often be wiped off with a
welding glove. "Slow speed dross" is normally present on
the bottom edge of the plate. It can vary from a light to
heavy bead, but does not adhere tightly to the cut edge,
and can be easily scraped off. "High speed dross" usually
forms a narrow bead along the bottom of the cut edge and
is very difficult to remove. When cutting a troublesome
steel, it is sometimes useful to reduce the cutting speed
to produce "slow speed dross". Any resultant cleanup can
be accomplished by scraping, not grinding.