Thermal Dynamics A80 CUTMASTER, Operating Manual, Page: 24 / 130

A80
INTRODUCTION 0-4985
2T-2
D. Parts - In - Place (PIP)
Torch Head has built - in switch
12 VDC circuit rating
E. Type Cooling
Combination of ambient air and gas stream through
torch.
F. Torch Ratings
Automated / Machine Torch Ratings
Ambient
Temperature
104° F
40° C
Duty Cycle
100% @ 100 Amps @ 400 scfh
80% @ 120 Amps @ 400 scfh
Maximum Current 120 Amps
Voltage (V
peak
)
500V
Arc Striking Voltage
7kV
Manual Torch Ratings
Ambient
Temperature
104° F
40° C
Duty Cycle
100% @ 100 Amps @ 400 scfh
Maximum Current 120 Amps (80% Duty Cycle)
Voltage (V
peak
)
500V
Arc Striking Voltage
7kV
G. Gas Requirements
Automated, Manual and Machine Torch Gas
Specifications
Gas (Plasma and Secondary)
Compressed Air
Operating Pressure
Refer to NOTE
60 - 95 psi
4.1 - 6.5 bar
Maximum Input Pressure
125 psi / 8.6 bar
Gas Flow (Cutting and Gouging)
300 - 500 scfh
142 - 235 lpm
! !
WARNING
This torch is not to be used with oxygen (O
2
).
NOTE!
Operating pressure varies with torch model,
operating amperage, and torch leads length.
Refer to gas pressure settings charts for each
model.
H. Direct Contact Hazard
For standoff tip the recommended standoff is 3/16
inches / 4.7 mm.
2T.04 Options And Accessories
For options and accessories, see section 6.
2T.05 Introduction to Plasma
A. Plasma Gas Flow
Plasma is a gas which has been heated to an extremely
high temperature and ionized so that it becomes electri-
cally conductive. The plasma arc cutting and gouging
processes use this plasma to transfer an electrical arc to
the workpiece. The metal to be cut or removed is melted
by the heat of the arc and then blown away.
While the goal of plasma arc cutting is separation of the
material, plasma arc gouging is used to remove metals
to a controlled depth and width.
In a Plasma Cutting Torch a cool gas enters Zone B,
where a pilot arc between the electrode and the torch
tip heats and ionizes the gas. The main cutting arc
then transfers to the workpiece through the column of
plasma gas in Zone C.
A-08331
Workpiece
Power
Supply
+
_
C
B
A
Typical Torch Head Detail