MIL-C-80036C
W h e n specified (see 6.2.1), the type
3 . 4 . 6 Cutting system plasma arc.
The plasma
II machine shall be equipped with a plasma arc cutting system.
arc system shalll conform to MIL-C-80090.
3 . 4 . 7 M o t o r i z e d torch holder.
U n l e s s otherwise specified (see 6.2.1),
t h e type I machine shall be equipped with four motorized torch holder assem-
b l i e s designed for mounting cylindrical oxygen fuel cutting torches as spec-
i f i e d i n 3 . 4 . 4 . U n l e s s otherwise specified (see 6.2.1), the type II machine
s h a l l be equipped with three motorized torch holder assemblies designed for
m o u n t i n g cylindrical oxygen fuel cutting torches, and one holder assembly
designed for mounting a plasma arc cutting torch conforming to MIL-C-80090.
T h e construction of the holder assemblies shall provide for manually posi-
t i o n i n g the assemblies at any point along the carriage, and for removal of
P r o v i s i o n s shall be made for tilting the
t h e assemblies from the carriage.
t o r c h forward for high speed ripping and tilting sideways for beveling. The
vertical travel of the torch shall be sufficient for cutting material 8
inches thick.
T h e torch holder suspension system shall be of sufficient
s t r e n g t h and rigidity to prevent binding or distortion in any manner, and to
a s s u r e operations within the tolerances specified herein.
When specified
( s e e 6.2.1), special torch holder suspension systems shall be furnished as
required.
Photoelectric tracer.
3.4.8
T h e machine shall be equipped with a
p h o t o e l e c t r i c c e l l s c a n n i n g tracer. T h e tracer shall follow a pencil or ink
l i n e drawing on suitable drafting or heavy white paper, or a contrasting
c o l o r template. The scanning head shall not contact the drawing or template
in any manner.
T h e width of the traced line shall be not less than 0.020
i n c h nor greater than 0.040 inch.
P e r f o r m a n c e of the tracer shall not be
a f f e c t e d by extraneous light normally encountered in shop areas.
The trac-
i n g head shall be equipped with an automatic shut-off device controlled by
t h e scanner.
T h e device shall stop the machine and turn off the flow of
g a s e s to all torches and electric power to the plasma torch if the scanner
s h o u l d lose the line,
A warning light shall be installed in a position vis-
i b l e to the operator to indicate when the machine has stopped.
The tracer
shall have electronic kerf compensation to allow for kerf correction to
0 . 2 5 0 inch. M e a n s shall be provided for adjusting the height of the tracing
h e a d with respect to the tracing table.
3 . 4 . 9 Operator control panel,
A l l controls for operation of the photo-
e l e c t r i c t r a c e r , i g n i t o r , p r e h e a t , c u t t i n g oxygen, positioning of torches,
f e e d c o n t r o l , i n d i v i d u a l t o r c h c o n t r o l , and movement of carriages shall be
p r o v i d e d in the control station.
Means shall be provided to manually steer
a n d remotely control the machine from the operator's panel.
The control
p a n e l shall be centrally located for ease of operation, and positioned so
t h e operator has an unobstructed view of the work area and tracing table at
a l l t i m e s . T h e control station shall be sealed against the entrance of dust
and moisture.
3 . 4 . 1 0 Gas control equipment.
The oxygen and fuel gas regulators and
t h e i r associated gauges shall b e conveniently located for ease of reference
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