Tweco 200 Ultra-Cut - Manual (Page 74)

Manual No. 0-5056 Ultra-Cut 200 4-8 OPERATION
4. Set the plasma and shield gas pressures and flows.
a. Set the MODE switch to SET PLASMA & SHIELD.
b. Use the PLASMA and SHIELD control knobs, pressure gauges, and flow meters to set plasma and
shield gas pressures and flows. Refer to the torch manual for pressure settings.
c. In installations using water shield, use the H
2
O MIST control knob and flow meter to set water flow rate.
Refer to the torch manual for flow rates.
5. Use the AMPERAGE SET-UP control knob to set the desired amperage output. The module will update the
amperage every 2 seconds after the last adjustment to the knob. The module keeps the set point in memory.
6. Place the MODE switch to the RUN position.
7. Set the Plasma Power Supply switch (on the Gas Control Module) to . The Module
performs purges of 15 seconds, 11 seconds, and another 11 seconds. This removes water from the torch
parts.
When switching gases between operations, allow enough purge time to clear the prior gas from the torch leads.
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 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
The condition (smooth or rough) of the face of the cut.