POST-INSTALLATION
HySpeed HT2000 Instruction Manual 5-5
22
Adjust Preflow Gases
8. Set the Test Preflow/Run/Test Cut Flow toggle switch to Test Preflow.
Verify that the plasma gas pressure gauges on the gas console both read 120 psi (8.3 bar). 90 psi for
Air/N
2
process.
9. Look at the oxygen and/or nitrogen-air flowmeters and set the Preflow plasma gas flow rate % by
referring to the Cut Charts in Section 6 and turning the oxygen and/or nitrogen-air Preflow adjust knobs.
10. Look at the shield gas pressure gauge on the gas console, and set to the Cut Chart specifications by
turning the shield gas adjust knob.
Adjust Cut Flow Gases and Check Initial Height Sensing (IHS)
11. Set the Test Preflow/Run/Test Cut Flow toggle switch to Test Cut Flow.
12. Look at the oxygen and/or nitrogen-air flowmeters and set the Cut Flow plasma gas flow rate % by
referring to the Cut Charts in Section 6. Use the Cut Flow toggle switch to set the plasma gases in this
mode. Verify that the O
2
plasma gas pressure reads 120 psi on the gas console. Adjust if necessary.
13. Set the switch to Run after setting the preflow and plasma flow rates.
14. Check the pilot arc operation by positioning the torch a minimum of 3 inches (75mm) above the work.
15. Depress the START button. After two seconds of gas preflow, the primary contactor will close and the
pilot arc will start. The pilot arc should emit a steady, hissing sound and a cone of light should appear at
the face of the torch nozzle. The pilot arc will continue for approximately 300 milli-seconds (O
2
), 600 milli-
seconds (Air/N
2
) and then go out automatically.
16. Place the metal on the work table to make a test pierce. With manual starting, no machine motion will
occur.
Note: The cutting machine must retract the torch at least one inch (25.4 mm) from the work
before the start cycle, or probes may hit the workpiece when START button is depressed.
Command THC users should reference the appropriate Command instruction manual.
17. Depress the START button. The probes will immediately descend and approximately 0.5 seconds later,
the torch will index toward the work. The DOWN indicator light on the V/C control should be on. When the
torch nears the work, probes will inductively detect work surface and down motion should stop. The
DOWN indicator light on the V/C module will go off and the probes will start to retract.
At this point, depress the STOP button and disable the Initial Height Sensing. You are now ready for Final
Torch Adjustment.
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