Hobart Welding Products AIRFORCE 625 - Manual (Page 21)

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A complete Parts List is available at www.HobartWelders.com
OM-926 Page 17
SECTION 5 − OPERATION
1 Output Control
Use control to set cutting output.
Place control in Gas/Air Set position to safely
adjust gas/air pressure. Only gas/air circuit
is activated.
2 Status Lights (See Section 6-2)
3 Power Light
4 Power Switch
.
The fan will normally run for
approximately 5 seconds after power
switch is placed in the Off position.
5 Pressure Gauge
6 Pressure Adjustment Knob
.
At ambient temperatures below −5 5 C
(23 5 F), readjustment of gas/air
pressure regulator may be necessary
(see Section 4-12).
Use only clean, dry air with 90 to 120 psi
(621 to 827 kPa) pressure. Prevent
moisture from entering air supply at
extreme cold temperatures.
Ref. 211 048
2
6
4
5
3
1
5-1. Controls
5-2. Cutting Speed
The cutting speed curve shows the
recommended maximum cutting
speed capabilities of the power
source and torch for mild steel of
various thickness.
The best cut quality is achieved by
cutting near the chart line. Cutting
below the line (too slow) will result
in excess dross. Cutting above the
line (too fast) will cause blowback
and lack of penetration.
0
50
100
150
200
250
300
350
400
16GA
(0.060)
1/8th 1/4th 3/8th 5/8th
Mild Steel Thickness(inches)
Cut
Speed
(in./min.)