Cut Quality - Lincoln Electric TORCHMATE 5100 User Manual

Cut Quality

Beveled edges are caused by the motion of the plasma gas as it is emitted from the nozzle. In plasma cutting, it is
unavoidable. A high-definition plasma cutter produces less bevel than a standard cutter.
Torch height, air pressure, air quality, cut direction, and consumable condition all influence bevel.
In plasma arcs used for cutting, the gas forms into a vortex. Because of this, the arc has a direction of rotation, which causes
one side of the cut to have more bevel than the other side. To reduce the bevel on the part, the proper direction of travel
must be used.
The direction of cuts are referred to as "conventional" and "climbing". In a conventional cut, the torch will go counter-
clockwise on outside cuts and clockwise on inside cuts. A climbing cut is the opposite, and the best bevel is achieved by
using a climbing cut. The best bevel is to the right of the direction of travel.
Conventional Climbing
Corners can have more bevel than a normal cut. This is caused when the machine slows down for the direction change. A
lower amperage in some cases allows for slower travel speeds and reduces "slowdown" bevel through corners.
Sharp corners can be achieved by cutting a larger shape that puts the slow down and acceleration of the machine into a
scrap area. This cut is used more often on thicker materials, where the corner bevel is increased dramatically.
Replace consumables regularly to reduce bevel. A worn tip or one with slag buildup can redirect air flow causing random
bevel and varying cut quality. Always check consumables when troubleshooting bevel.
One of the easiest ways to reduce bevel is by cutting at the proper speed and height for the material and amperage. Air that
is clean, dry, and at a constant pressure can also decrease bevel.
Beveled Edge Corner Loops
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User Guide