Tweco A40 CutMaster - Manual (Page 21)

CUTMASTER A40
Manual 0-4978 INTRODUCTION 2T-1
SECTION 2 TORCH:
INTRODUCTION
2T.01 SCOPE OF MANUAL
This manual contains descriptions, operating instructions and
maintenance procedures for the 1Torch Models SL60/Manual,
SL100/Mechanized and SL100 SV Automated Plasma Cutting
Torches. Service of this equipment is restricted to properly
trained personnel; unqualified personnel are strictly cautioned
against attempting repairs or adjustments not covered in this
manual, at the risk of voiding the Warranty.
Read this manual thoroughly. A complete understanding of the
characteristics and capabilities of this equipment will assure the
dependable operation for which it was designed.
2T.02 GENERAL DESCRIPTION
Plasma torches are similar in design to the automotive spark
plug. They consist of negative and positive sections separated
by a center insulator. Inside the torch, the pilot arc starts in the
gap between the negatively charged electrode and the positively
charged tip. Once the pilot arc has ionized the plasma gas, the
superheated column of gas flows through the small orifice in
the torch tip, which is focused on the metal to be cut.
A single torch lead provides gas from a single source to be
used as both the plasma and secondary gas. The air flow is
divided inside the torch head. Single - gas operation provides
a smaller sized torch and inexpensive operation.
NOTE
Refer to Section "2T.05 Introduction to
Plasma" on page 2T-2, for a more detailed descrip-
tion of plasma torch operation.
Refer to the Appendix Pages for additional specifi-
cations as related to the Power Supply used.
2T.03 SPECIFICATIONS
A. Torch Configurations
1. Automation Torch, Model
The standard automation torch has a positioning tube with
rack & pinch block assembly and a solenoid valve.
Art # A-07402_AC
1.75" /
44.5 mm
1.375" / 35 mm
18.875" / 479 mm
0.625" /
16 mm
4.95" / 126 mm
1.175" / 30 mm
12.285" / 312 mm
2.875” /
73 mm
2. Machine /Mechanized Torch, Model
The standard machine torch has a positioning tube with
rack & pinch block assembly.
Art # A-02998
1.75" /
44.5 mm
1.375" / 35 mm
15.875" / 403 mm
0.625" /
16 mm
4.95" / 126 mm
1.175" / 30 mm
9.285" / 236 mm
3. Hand/Manual Torch, Models
The hand torch head is at 75° to the torch handle. The hand
torches include a torch handle and torch trigger assembly.
10.125" (257 mm)
3.75"
(95 mm)
1.17" (29 mm)
Art # A-03322_AB
B. Torch Leads Lengths
Hand Torches are available as follows:
• 20 ft / 6.1 m, with ATC connectors
• 50 ft / 15.2 m, with ATC connectors
Machine / Automation Torches are available as follows:
• 5 foot / 1.5 m, with ATC connectors
• 10 foot / 3.05 m, with ATC connectors
• 25 foot / 7.6 m, with ATC connectors
• 50 foot / 15.2 m, with ATC connectors
C. Torch Parts
Starter Cartridge, Electrode, Tip, Shield Cup
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