Ultra-cut 200 xt – Tweco 200 XT Ultra-Cut Plasma Cutting System User Manual

Page 75

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ULTRA-CUT 200 XT

Manual 0-5273

OPERATION

4-11

6. Place the MODE switch to the RUN position.

7. Set the Plasma Power Supply Enable / Disableswitch (on the Gas Control Module) to Enable. The Module

performs purges of 15 seconds, 11 seconds, and another 11 seconds. This removes water from the torch

parts.

NOTE

When switching gases between operations, allow enough purge time to clear the prior gas from the torch leads.

CAUTION

While nothing prevents the operator from switching gases during piloting or cutting it is not recommended to do

so. If the operator switches gases during piloting or cutting, the power supply will finish the cut with the first gas

chosen. Then the gas control will switch to the new gas. Switching gases during piloting or cutting may damage

torch parts, torch leads, the control module, or the piece being cut.

Cut Quality
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. Cut quality will vary on different materials and thicknesses.

Right Side

Cut Angle

Left Side

Cut Angle

A-00512

Kerf Width

Cut Surface

Bevel Angle

Top Edge

Rounding

Cut Surface

Drag Lines

Dross

Build-Up

Top

Spatter

A-00007

Cut Surface

The condition (smooth or rough) of the face of the cut.

Bevel Angle

The angle between the surface of the cut edge and a plane perpendicular to the surface 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 plasma arc on the workpiece.

Dross Build-up and Top Spatter

Dross is molten material which is not blown out of the cut area and re-solidifies on the plate. Top spatter is

dross which accumulates on the top surface of the workpiece. Excessive dross may require secondary cleanup

operations after cutting.

Kerf Width

The width of material removed during the cut.

Nitride Build-up

Nitride deposits which may remain on the cut edge of the carbon steel when nitrogen is present in the plasma

gas stream. Nitride buildups may create difficulties if the steel is welded after the cutting process.

Direction of Cut

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