Hypertherm HT4001 Plasma Arc Cutting System - Manual (Page 104)

OPERATION
6-98
HT4001
Instruction Manual 5-13
Daily Start-Up
1. Refer to the Cut Charts beginning on page 5-21 to choose the correct consumables for your cutting needs.
Refer to Changing Consumable Parts later in this section for detailed information on the removal and
replacement of consumables. Replace consumable parts, if needed.
2. Verify that the torch is squared to the material and adjusted to the proper height. Refer to Torch Alignment on
page 4-38 for the torch alignment procedure. Refer to Pre-Operation System Checkout in this section to adjust
the torch height.
3. Set S2 on the gas console to Run.
4. Set the main disconnect switches for the power supply and the water chiller to ON.
5. Turn the supply gases ON.
Set the pressure on the nitrogen supply to read 150 psi +/- 10 psi (10.3 bar +/- 0.7 bar) at the N
2
pressure
gauge on the gas console.
Set the pressure on the oxygen supply to read 120 psi +/- 10 psi (8.3 bar +/- 0.7 bar) at the O
2
pressure
gauge on the gas console.
6. Turn the water supply to the water chiller ON.
7. Turn on the water chiller by depressing the START switch.
8. Set S1 on the gas console to plasma gas N
2
or O
2
.
9. Turn on the power supply by throwing the POWER circuit breaker on the rear of the power supply to the UP
position.
10. Set the VOLTAGE from the Digital (DR) V/C module, or from the machine computer. Select the arc voltage
from the Cut Charts for the type and thickness of metal to be cut.
Setting the Current
When setting the CURRENT from a low value to a higher value:
Set the desired value on the V/C module or CNC programmable current device.
When setting the CURRENT from a high value to a lower value:
With the V/C module, dial the current to 50 amps below the desired value, and then back up to the desired
value.
When using a CNC programmable current device, set the current to the desired value and then restart the
plasma system.
WARNING
Before operating this system, you must read the Safety section thoroughly! Wear proper clothing. Your
cutting environment must meet requirements outlined in the Safety section. Turn main disconnect
switches to the HT4001 power supply and water chiller OFF before proceeding.