70 amp, Air & ch, Shield 70 amp cutting – Hypertherm HD3070 Plasma Arc Cutting System w/ Automatic Gas Console User Manual
Page 120
HD3070 with Automatic Gas Console
Instruction Manual
4-31
16
OPERATION
PAC186
Stainless Steel##
Air Plasma / Air & CH
4
Shield
70 Amp Cutting
Shield
020796
Nozzle
020647
Electrode
120112
Retaining Cap
020795
Swirl Ring
020789
PAC186 Torch
120349
Shield Cap
020634/020687
Material
Thickness
(GA)
(in)
(mm)
Arc
Voltage
(volts)
Torch
Standoff**
(in)
(mm)
Travel
Speed
(ipm)
(m/min)
Pierce
Delay
(dial)
(sec)
Initial
Piercing
Height
***
(in)
(mm)
10
0.135
3.4
75
0
100
0
35
–
134
0.060
1.5
100
2.54
0.140
3.5
1
0.3
3/16
4.8
75
0
60
3
35
–
139
0.080
2.0
80
2.00
0.140
3.5
1.5
0.4
1/4
6.4
75
0
30
10
35
–
149
0.140
3.5
55
1.40
0.180
4.5
2
0.5
3/8
9.5
75
0
30
10
35
–
164
0.140
3.5
30
0.76
0.200
5.0
2
0.5
1/2
12.7
75
0
40
20
50
–
189
0.250
6.3
25
0.64
****
****
Air and CH
4
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.
##
Stainless steel plate sometimes comes with a protective plastic film. Remove film prior to cutting.
* Slightly increasing the test preflow Air 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.
*** Measured from tips of shield adapter 020796.
**** Piercing 1/2 inch (12.7 mm) stainless steel is not recommended, it will shorten consumable life. Starting cuts at the edge of
the metal is recommended.
Counter clockwise (CCW) consumables are available for mirror image cutting. Refer to Section 6, Parts List.
If problems occur with the cutting process, and the flowrates are suspect, refer to Section 5, Maintenance, Gas System Back
Test Cut
Flowrates (%)
Shield
Air
CH
4
(3)
#
(4)
#
Plasma
Air
(5)
#
(6)
#
Test Preflow*
Flowrates (%)
Preflow
Air
CH
4
(1)
#
(2)
#