Lincoln Electric DC-655 Operator's Manual page 18

B-4
CC mode may also be used for CC submerged
arc with appropriate arc-sensing CC(VV) wire
feeders if arc force is set high enough. Refer to
Welding Performance Section.
CV MIG provides a constant voltage output
characteristic through the 13 to 44 volt range.
The voltage is adjusted within this range by the
Output Control dial.
The dynamic characteristics of this mode are
ideal for open arc processes including,
MIG/MAG (GMAW), Innershield®, and other
cored wire (FCAW) processes. Faster travel
submerged arc processes and CV air carbon-
arc gouging may also use this mode. Refer to
the Welding Performance Section.
CV Sub-Arc provides the same constant voltage
output control range as CV MIG, but the dynam-
ic characteristics of this mode make possible
improved CV (constant wire speed) submerged
arc welding. This improved process is most
noticeable on high deposition slow travel speed
welds. Fast travel, narrow bead subarc welds
will have better performance in CV MIG mode.
7. ARC FORCE CONTROL - This control is only func-
tional in CC Stick mode. It prevents "stubbing" of
FIGURE B.2 LOWER CASE FRONT CONTROLS & CONNECTIONS
1
6
1. 115VAC DUPLEX RECEPTACLE (Domestic and
Canadian Models) This receptacle provides up to
20 amps of 115 VAC auxiliary power on the
Domestic Models and up to 15 amps on the
Canandian Model.
OPERATION
the electrode by providing the extra weld current
that linearly increases as the welding voltage
decreases below a level determined by the setting
of the constant current control.
The Arc Force control knob, located behind the
latched cover, adjusts arc force from "Min" (no cur-
rent increase) to "Max" (higher short circuit current).
"Mid" position (#5) is reccommended for most CC
welding. Refer to the Welding Performance
Section.
8. OPTIONAL VOLTMETER & AMMETER - Digital
or analog meter kits are available as field installed
options. Refer to the Accessories Section of this
manual.
9. THERMAL PROTECTION LIGHT
machine overheats due to lack of proper air flow
through the machine or due to exceeding the
machine's duty cycle, thermostats will disable the
welding output and this light will illuminate. Input
power is still applied to the machine and the cooling
fan will continue to run.
the welding output will resume.
2
3
5
2. 115VAC CIRCUIT BREAKER
protects the 115 VAC auxiliary circuits located in
the duplex receptacle, terminal strip and MS- recep-
tacle. Breaker is rated 20 amps on Domestic
Models and 15 amps on all other models.
DC-655
When the machine cools
4
7
B-4
- If the
- This breaker