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Torch Head
Electrode
Start Cartridge
Shield Cup
A-03510_AB
Torch Parts (Drag Shield Cap & Shield Cup Body Shown)
3.
Install the replacement electrode by
pushing it straight into the torch head
until it clicks.
4.
Install the start cartridge and desired tip
for the operation into the torch head.
5.
Hand tighten the shield cup assembly
until it is seated on the torch head. If
resistance is felt when installing the cup,
check the threads before proceeding.
4T.04
Cut Quality
NOTE!
Cut quality depends heavily on setup and
parameters such as torch standoff, alignment
with the workpiece, cutting speed, gas pressures,
and operator ability.
Cut quality requirements differ depending on
application. For instance, nitride build - up and
bevel angle may be major factors when the surface
will be welded after cutting. Dross - free cutting
is important when finish cut quality is desired to
avoid a secondary cleaning operation. The follow-
ing cut quality characteristics are illustrated in the
following figure:
Kerf Width
Top
Spatter
Dross
Build-Up
Cut Quality Characteristics
0700 402 229
Large O-Ring
Small O-Ring
Tip
Cut Surface
Bevel Angle
Top Edge
Rounding
Cut Surface
A-00007
Drag Lines
TORCH OPERATION
CUTMASTER 50+, CUTMASTER 70+
Cut Surface
The desired or specified condition (smooth
or rough) of the face of the cut.
Nitride Build - Up
Nitride deposits can be left on the surface
of the cut when nitrogen is present in the
plasma gas stream. These buildups may cre-
ate difficulties if the material is to be welded
after the cutting process.
Bevel Angle
The angle between the surface of the cut
edge and a plane perpendicular to the sur-
face of the plate. A perfectly perpendicular
cut would result in a 0° bevel angle.
Top - Edge Rounding
Rounding on the top edge of a cut due to
wearing from the initial contact of the plas-
ma arc on the workpiece.
Bottom Dross Buildup
Molten material which is not blown out of
the cut area and resolidifies on the plate. Ex-
cessive dross may require secondary cleanup
operations after cutting.
Kerf Width
The width of the cut (or the width of material
removed during the cut).
Top Spatter (Dross)
Top spatter or dross on the top of the cut
caused by slow travel speed, excess cutting
height, or cutting tip whose orifice has be-
come elongated.
4T.05
General Cutting Information
WARNING
!
!
Disconnect primary power at the source before
disassembling the power supply, torch, or torch
leads.
Frequently review the Important Safety
Precautions at the front of this manual. Be sure
the operator is equipped with proper gloves,
clothing, eye and ear protection. Make sure no
part of the operator's body comes into contact
with the workpiece while the torch is activated.
47
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