Sequence Of Operation - Miller Electric Spectrum 125C Owner's Manual

5-4. Sequence Of Operation

EXAMPLE Of Cutting Operation
For shielded cutting, place drag shield on edge
of metal. For non-shielded cutting (non-CE
only), use 1/8 in (3.2 mm) standoff distance
(dragging tip will reduce tip life).
Adjust torch speed so
sparks go thru metal and
out bottom of cut.
As a convenience, the torch can be set up
with two cutting combinations, either drag
or non-shielded cutting. The torch comes
standard with drag cutting.
Drag Cutting
Use retaining cup (197 567) and drag
shield (196 929) to obtain a 1/16 in
(1.6 mm) standoff automatically. This
combination is designed to allow
dragging the torch directly on the
workpiece.
Use shields for ease of use when
cutting with a template, or when drag
cutting is preferred.
.
Moisture from the compressor will form in the air line and at
the torch. It will be normal to sometimes see moisture come
out the end of the torch.
The pilot arc starts immediately when trigger is pressed.
Raise trigger lock and press
trigger. Pilot arc starts.
Pause briefly at end of
cut before releasing trigger.
.
Maximum performance on thicker materials can be obtained by using
non-shielded cutting with a 1/16 - 1/8 in (1.6 - 3.2 mm) standoff.
Use retaining cup (196 928) and hold a
1/16-1/8 in (1.6-3.2 mm) standoff between
the workpiece and cutting tip.
Use non-shielded when visually following
a line.
197 567
.
This combination can be used for drag
cutting but does not provide optimum
cutting performance on thicker material.
196 929
start moving torch across metal.
Postflow continues for approx. 12 seconds
after releasing trigger; cutting arc can be in-
stantly restarted during postflow by raising
trigger lock and pressing trigger.
Non-Shielded Cutting
After cutting arc starts, slowly
196 926
196 928
1/16-1/8 in
(1.6-3.2 mm)
standoff
workpiece
801 400-A
OM-2248 Page 15