Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console - Manual (Page 193)

5-68 HD3070 with Automatic Gas Console Instruction Manual
16
MAINTENANCE
Flowrates (%)
Shield Plasma
O
2
& N
2
O
2
(3) (4) (5) (6)
Pressures
Preflow
(psi/bar)
Flowrates
(%)
O
2
& N
2
(1) (2)
27/1.9 5 75 70/4.8 17/1.2 30 10 40 —
27/1.9 90/6.2 17/1.2
Pressures
Plasma Shield
(psi/bar)
PAC 184 Torch
Mild Steel – Oxygen Plasma – 15 Amp Consumables
Test Preflow Test Cut
Test
Run
Flowrates (%)
Shield Plasma
O
2
& N
2
O
2
(3) (4) (5) (6)
Pressures
Preflow
(psi/bar)
Flowrates
(%)
O
2
& N
2
(1) (2)
29/2.0 5 75 75/5.2 7/0.5 15 5 46 —
30/2.1 95/6.5 8/0.6
Pressures
Plasma Shield
(psi/bar)
PAC 184 Torch
Mild Steel – Oxygen Plasma – 30 Amp Consumables
Test Preflow Test Cut
Test
Run
Flowrates (%)
Shield Plasma
O
2
& N
2
O
2
(3) (4) (5) (6)
Pressures
Preflow
(psi/bar)
Flowrates
(%)
O
2
& N
2
(1) (2)
25/1.7 5 75 85/5.9 15/1.0 30 10 40 —
26/1.8 99/6.8 15/1.0
Pressures
Plasma Shield
(psi/bar)
PAC 186 Torch
Mild Steel – Oxygen Plasma – 15 Amp Consumables
Test Preflow Test Cut
Test
Run
Gas System Back Pressure Checks
Use the back pressure checks to find leaks or restrictions in the gas lines and motor valves. The checks can be
done when the system is in the test cut or test preflow mode. In the Test modes, set the flowrates as indicated
below and check the corresponding pressures (± 10% is allowable). The pressures in the Run mode are for
reference only. Back pressures in the Run mode may be different than those in the Test modes. For a low
pressure, check for a leak. For a high pressure, check for a restriction in the gas line or a consumable problem.
Refer to Figure 4-2 to locate the flowrate set controls; Figure 4-3 for flowrate and pressure readings; Cut Charts in
Section 4,
Operation for additional information; and to the gas system schematic at rear of manual.