Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console - Manual (Page 111)

4-22 HD3070 with Automatic Gas Console Instruction Manual
16
OPERATION
PAC184
Mild Steel
O
2
Plasma / O
2
& N
2
Shield
15 Amp Cutting
Shield
120222 Nozzle
120277 Electrode
120209
Retaining Cap
120219
Swirl Ring
120212
PAC184 Torch
120208 Shield Cap
120221/120543
Material
Thickness
(GA) (in) (mm)
Test Cut
Flowrates (%)
Shield
O
2
N
2
(3) # (4) #
Plasma
O
2
(5) # (6) #
Test Preflow*
Flowrates (%)
Preflow
O
2
N
2
(1) # (2) #
Arc
Voltage
(volts)
Torch
Standoff**
(in) (mm)
Travel
Speed
(ipm) (m/min)
Pierce
Delay
(dial) (sec)
Initial
Piercing
Height
(in) (mm)
26 0.018 0.5 5 75 30 10 40 – 134 0.020 0.5 145 3.68 0.040 1.0 0 0.05
24 0.024 0.6 5 75 30 10 40 – 135 0.020 0.5 129 3.28 0.040 1.0 0 0.05
22 0.030 0.8 5 75 30 10 40 – 136 0.020 0.5 115 2.92 0.040 1.0 0 0.05
20 0.036 0.9 5 75 30 10 40 – 136 0.020 0.5 100 2.54 0.040 1.0 0 0.05
18 0.048 1.3 5 75 30 10 40 – 137 0.020 0.5 85 2.16 0.040 1.0 0.5 0.16
16 0.060 1.5 5 75 30 10 40 – 142 0.030 0.8 65 1.65 0.040 1.0 1 0.27
14 0.075 1.9 5 75 30 10 40 – 144 0.040 1.0 45 1.14 0.060 1.5 1.5 0.37
12 0.105 2.7 5 75 30 10 40 – 148 0.040 1.0 35 0.90 0.060 1.5 2 0.50
10 0.135 3.4 5 75 30 10 40 – 151 0.040 1.0 25 0.64 0.060 1.5 2.5 0.60
O
2
and N
2
gas inlet pressures must be between 105 - 135 psi (7.2 - 9.2 bar) for all material thickness.
# Refer to LCD display Figure 4-3.
* Slightly increasing the test preflow O
2
and N
2
flowrates may increase piercing capability on the thicker materials listed above.
However, increasing the preflow flowrates too much may affect plasma starting reliability (misfiring).
** Torch standoff tolerances are ± 0.005 inch (± 0.125 mm). When using a THC, tolerances are ± 1 volt.
If problems occur with the cutting process, and the flowrates are suspect, refer to Section 5, Maintenance, Gas System Back
Pressure Checks.