Lincoln Electric IM318 IDEALARC DC1500 - Manual (Page 10)

B-1 OPERATION B-1
IDEALARC ® DC-1500
DUTY CYCLE
The DC-1500 is rated for 100% duty cycle at 1500 amps
and 60 volts.
SET POLARITY
Connect the electrode cable to the “Positive” or “Negative”
studs depending upon the electrode polarity desired.
Connect the work cable to the other studs.
Set the “Electrode Negative — Electrode Positive” switch
to correspond to the polarity of the electrode cable connec-
tion. This switch setting is necessary for proper operation
of the Lincoln wire feeder attached to the power source.
START THE WELDER
Press the “ On - Off ” pushbuttons to start and stop the
welder. The red pilot light near the center of the control
panel indicates when the welder is on.
SET FOR MACHINE OR REMOTE CONTROL
The output can be controlled either at the wire feeder
or the DC-1500. When the NL Option Kit is installed,
the output is controlled only from the K775 Remote
Control usually mounted at the wire feeder.
To adjust the output from the wire feeder, set the tog-
gle switch on the front of the DC-1500 to “Output
Control Remote”. To adjust the output using the DC-
1500 “Output Control” rheostat, set this switch to
“Output Control at DC-1500”.
SET THE WELDER OUTPUT
With the toggle switch set to “Output Control at DC-
1500”, rotating the “Output Control” rheostat on the
DC-1500 from 1 to 10 increases the machine output
from minimum to maximum. The same full range con-
trol is set from the wire feeder or K775 when the toggle
switch is set to “Output Control Remote”.
Set the output as required by the welding procedures.
MODE SWITCH
The toggle switch labeled CV Innershield, CV sub-
merged arc, VV submerged arc, is used to select the
proper welder characteristics for the process being
used.
NOTE: Some machines say ”VV” for variable voltage
while other machines use the terminology “CC” for
constant current.
The CV Innershield Mode permits the DC-1500 to pro-
duce essentially a flat output characteristic that can be
varied from approximately 20 to 60 volts. In this posi-
tion the dynamic characteristics of the machine under
welding conditions provides optimum welding charac-
teristics for Innershield welding and other open arc
processes.
The CV Submerged Arc Mode also produces an
essentially flat output characteristics that can be var-
ied from approximately 20 to 60 volts. The dynamic
characteristics of the CV Submerged Arc Mode are
such that excellent submerged arc welding can be
obtained for most procedures that previously required
a constant current type power source.
The VV Submerged Arc Mode permits the DC-1500 to
produce a constant current output characteristic
through the range of 200A-28V to 1500A-60V with an
open circuit voltage of 45 to 98 volts. Although almost
all submerged arc welding can now be done in the CV
mode, the VV mode is available for those procedures
where VV (CC) may still be desirable.
Set-up for Various Processes
Selection of mode switch position — There are sever-
al general rules to follow in the selection of the mode
switch position.
1. Use the CV Innershield mode for all Innershield
welding.
ELECTRIC SHOCK
can kill.
• Do not touch electrically live
parts or electrode with skin or
wet clothing.
• Insulate yourself from work
and ground.
ARC RAYS
can burn.
• Wear eye, ear and body protec-
tion.
WELDING SPARKS
can cause fire or
explosion.
• Keep flammable material
away.
FUMES AND
GASES can be
dangerous.
• Keep your head out of fumes.
• Use ventilation or exhaust to
remove fumes from breath-
ing zone.
WARNING
SAFETY PRECAUTIONS