Thermal Dynamics CUTMASTER 60i Service Manual page 41

Sequence of Operation (Block Diagram)
ACTION:
Close external
disconnect switch.
RESULT:
Power to system.
ACTION:
Connect work cable to workpiece.
RESULT:
System is ready
for operation.
ACTION:
Protect eyes and activate
Torch switch (START)
RESULT:
Fan goes to high speed. Gas flows
briefly, then stops. Gas restarts.
DC indicator
Pilot arc established.
ACTION:
Release Torch switch.
RESULT:
Main arc stops.
Gas flow stops after post - flow.
(Fans will continue to run for
5 minutes after the Torch switch
[START] is removed)
Manual 0-5475
ACTION:
ON / OFF switch to ON
RESULT:
AC indicator ON.
GAS indicator
ON when input
pressure is adequate
for power supply operation.
Power circuit ready.
ON
Power supply fans shut off.
ACTION:
Set Torch Type and
Lead Length. Select
SET/PURGE
mode to
confirm the gas
operation and purge
the torch if needed
Torch moved away from work (while
PILOT ARC
transfer distance of workpiece.
ACTION:
ON / OFF switch
to OFF
RESULT:
All indicators off.
SERVICE
CUTMASTER 60i
ACTION:
Select desired Operating mode
RUN,
LATCH,
Rapid Auto Restart (RAR),
Gouge.
Set desired Operating Current
Set the Gas pressure to
the green (nominal) indicator.
ACTION:
still activated).
RESULT:
Main arc stops.
Pilot arc automatically
restarts.
ACTION:
Torch moved within
RESULT:
Main arc transfers.
Pilot arc off.
ACTION:
Unplug input
power cord or
open external
disconnect.
RESULT:
No power to system.
Art #A-13266
5-7