Tweco 15XC Merlin - Manual (Page 52)

OPERATION 4-18 Manual 0-2251
4.7 MACHINE TORCH OPERATION
Cutting with a
Machine Torch
1. A machine torch should be aligned perpendicular to
the surface of the workpiece to obtain a clean, vertical
cut. Use a square to align the torch (see Figure 4-I).
2. Position the center of the torch over the edge of the
workpiece where the cut is to start. The transferred
cutting arc will then be established at the plate edge
when the torch is activated.
3. The machine torch can be activated by the remote
operator control panel, remote control pendant, or by
remote interface device such as CNC. After a two
second gas purge, the pilot arc will start. The pilot arc
will stay on as long as the torch is activated.
4. With the pilot arc on the main cutting arc is established
as soon as the torch is brought within 1/8 - 3/8 in (3 -
10 mm) of the workpiece. If the cutting arc is inter-
rupted and the torch is still activated, as when cutting
expanded metal, the pilot arc will automatically restart
(see Section 4.5, Plasma Cutting Operation, Auto-
Restart Options). De-activating the torch will shut off
either the pilot or main arc (depending on the mode of
operation).
Figure 4-I Machine Torch Set-up