Hypertherm HT2000LHF, Instruction Manual

Page: 58 / 202

OPERATION
HySpeed HT2000LHF
Instruction Manual
4-5
6
Turn Power Supply On and Adjust Voltage/Current
6. Set the main disconnect switch for the power supply to the On position. See
Status Indicators Before Startup
.
Depress the POWER ON (I) button on the power supply. Ensure that the green POWER ON indicator on the
power supply illuminates.
7. Set the VOLTAGE and CURRENT on the Digital Remote. Select the arc current and arc voltage from the
Cut Charts
for the type and thickness of metal to test cut.
Adjust Preflow Gases
8. Set S2 toggle switch to Test Preflow . Verify that the plasma gas pressure gauges on the gas console both
read 120 psi (8.3 bar).
9. Look at FM1 and/or FM2 and set the Preflow plasma gas flow rate. Refer to the
Cut Charts
for flow rate
percentage.
10. Look at PG3 on the gas console, and set the Shield gas flow rate. Refer to the
Cut Charts
for flow rate
percentage.
Adjust Cut Flow Gases and Check Initial Height Sensing (IHS)
11. Set S2 toggle switch to Test Cut Flow.
12. Look at FM1 and/or FM2 and set the Cut Flow plasma gas flow rate. Refer to the
Cut Charts
for flow rate
percentage.
13. Set S2 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 (75 mm) above the work.
15. Depress the START button. After 2 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 300ms (O
2
) and 600 ms (Air/N
2
) and then extinguish
automatically.
16. Place the workpiece 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 1 inch (25.4 mm) from the work before the start
cycle, or probes may hit the workpiece when the START button is depressed.
17. Depress the START button. The IHS probes will immediately descend and approximately 0.5 seconds later, the
torch will move toward the workpiece. The DOWN indicator lamp on the Digital Remote should be illuminated.
When the torch nears the workpiece, the probes will inductively detect the work surface and the down motion
should stop. The DOWN indicator lamp on the Digital Remote will extinguish and the probes will retract.
At this point, depress the STOP button and disable the IHS system. You are now ready for the Final Torch
Adjustment.