Tweco PCM - 102 Machine Torch - Manual (Page 15)

Manual 0-2818 2-1 INTRODUCTION
SECTION 2:
INTRODUCTION
2.01 Scope of Manual
This manual contains descriptions, operating instructions and
maintenance procedures for the PCH/M-102 Torch using the
SureLok electrode design. Service of this equipment is restricted
to properly trained personnel; unqualified personnel are strictly
cautioned against attempting repairs or adjustments not cov-
ered 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.
2.02 General Description
NOTE
Refer to Section 2.05, Introduction To Plasma, for
a more detailed description on plasma theory.
The Torch provides cutting capacity of up to 1 inch (25.4 mm) at
100 amperes. In the torch, a single torch lead provides com-
pressed air 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.
Plasma torches are similar in design to the common automotive
spark plug. They consist of negative and positive sections
which are separated by a center insulator. Inside the torch, the
pilot arc is initiated 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.
2.03 Specifications & Design
Features
NOTE
Refer to Appendix Pages for additional specifica-
tions as related to the Power Supply used.
A. Torch Configurations and Dimensions
1. Hand Torch
Available with torch head at 70° or 90° to the torch
handle. The hand torches include a torch handle
and torch switch assembly.
2. Machine Torch
The standard machine torch has a fiberglass posi-
tioning tube with rack & pinch block assembly.
Available options include a kit with metal mount-
ing tube with rack & pinion assembly or a kit with
the pinion assembly only.
3.0 in
(76.2 mm)
10.5 in
(267 mm)
A-02804
1.1in
(28 mm)
10.0 in
(254 mm)
3.4 in
(86.4 mm)
1.1in
(28 mm)
14.1 in
(358 mm)
0.62 in
(15.2 mm)
0.75 in
(19 mm)
5.1 in
(129.5 mm)
1.1 in
(28 mm)
1.4 in
(35.6 mm)
13.5 in (343 mm) Max
3.7 in (94 mm) Min
Figure 2-1 Torch Configurations and Dimensions