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1. INPUT POWER ON/OFF SWITCH - This tog-
gle switch turns the machine on or off. Putting the
switch in the ON position energizes the
machine’s input contactor applying input power to
the machine. Switching the switch to the OFF
position de-energizes the input contactor. This
switch is also used to reset a machine shutdown.
(See Machine Shutdown section)
2. PILOT LIGHT - When the power switch is in the
ON position the machine’s white pilot light will illu-
minate. If the input contactor de-energizes the
machine in a shutdown situation, the pilot will still
illuminate. In this situation it will be necessary to
reset the machine by switching the power switch to
the OFF then ON position. (See Machine
Shutdown section)
3. OUTPUT CONTROL - This control provides
continuous control of the machine’s output from
minimum to maximum as it is rotated clockwise.
The CV mode voltage range of control is 13 to 44V.
The CC mode current range of control is 50 to
815A.
4. OUTPUT TERMINALS ON/REMOTE - When this
switch is in the REMOTE position, the DC-655’s
output terminals will be electrically “cold” until a
remote device such as a wire feeder closes the #2 and
#4 circuit in the MS-receptacle or terminal strip. When
this switch is in the ON position the machine’s output
terminals will be electrically energized all the time.
5. LOCAL/REMOTE CONTROL SWITCH - When
this switch is set to the LOCAL position, con-
trol of the output voltage is via the output control
on the DC-655’s control panel. When this switch is
set to the remote position, control is through a
remote source such as a wire feeder via the #75,
#76, and #77 leads in the MS-receptacle or termi-
nal strip.
6.
CC STICK/CV SUBARC/CV MIG MODE SWITCH -
This switch selects the proper welding characteris-
tics for the process being used:
CC Stick provides a constant current output
characteristic through the 50 to 815 amp
range. The current is adjusted within this
range by the Output Control dial. The open
circuit (no load) voltage will be about 68 volts
in this mode.
This mode is used for stick welding (SMAW)
and CC air carbon-arc gouging, and employs
a “Hot Start” feature and an Arc Force Control.
OPERATION
B-4 B-4
IDEALARC DC-655
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CONTROLS AND SETTINGS
All operator controls and adjustments are located on the case front of the DC-655. Refer to Figures B.1, and B.2
and corresponding explanations.
FIGURE B.1 CONTROL PANEL CONTROLS
DC-655
5
4
8
1
9
2
3
6
7