Operating Steps; Remote Control Of Machine Operation - Lincoln Electric IDEALARC DC-600 Operating Manual

OPERATING STEPS

The following procedures are for using the Idealarc DC-600 in the
local control mode of operation. For remote control of the
machine, see the Remote Control of Machine Operation section.
Before operating the machine, make sure you have all materials
needed to complete the job. Be sure you are familiar with and
have taken all possible safety precautions before starting work. It
is important that you follow these operating steps each time you
use the machine.
1. Turn on the main AC power supply to the machine.
2. Set the CONTROL CIRCUIT POLARITY SWITCH to the
appropriate position.
- Set toggle to "Electrode Negative" position if the
electrode is connected to the negative (-) output
terminal.
- Set toggle to "Electrode Positive" position if the
electrode is connected to the positive (+) output
terminal.
3. Set the WELDING MODE SWITCH to welding process
being used.
- CV Submerged Arc
- CV Innershield
- CC Stick
4. Push the ON/OFF PUSH BUTTON to the ON position
- The red neon light glows.
- The fan starts.
5. Set Output Control Potentiometer to desired voltage or
current.
Make the weld (Note: Terminal #2 and #4 must
6.
connected together to energize the machine output).
REMOTE CONTROL OF MACHINE
OPERATION
The toggle switch on the control panel labelled "Remote - Panel"
gives the operator the option of controlling the machine output
from a remote location. If in the Remote position a wire feeder with
remote control capabilities or a remote control device such as a
K857 must be connected to terminals 75, 76, and 77. Refer to
Accessories Section for wire feeder remote information.
WELDING PROCEDURE
RECOMMEDATIONS
Select Welding Mode Switch position based on type of welding to
be done.
1. Innershield Welding/Other Open Arc Processes: Use the
CV Innershield mode.
2. Submerged Arc Welding: Use the CV Submerged Arc
mode. If performing high speed welding, switch between
the CV Submerged Arc and the CV Innershield mode and
use the mode that produces the best welding results.
3. Air/Carbon Arc Cutting / Stick Welding / High Current, Large
Puddle Submerged Arc Welding: Use the CC Stick mode.
When the Idealarc DC-600 is used for Air/Carbon Arc
cutting, the OUTPUT CONTROL POTENTIOMETER
should be set to "9" initially. Based on the size of the carbon
being used or the process, turn the potentiometer to a lower
setting as required by the process.You can use carbon rods
up to 3/8" in diameter at currents as high as 750 amps with
excellent arc control. The welder protection circuit protects
the machine from extremely high short cir-cuiting pulses.
IMA 607A
SEMI-AUTOMATIC AND AUTOMATIC
WIRE FEEDING WITH A IDEALARC DC-
600 AND WIRE FEEDERS
When using the Idealarc DC-600 with semi-automatic or
automatic wire feeding equipment and for stick welding or
air/carbon arc cutting, it is recommended that the optional MULTI-
PROCESS SWITCH be used. This switch permits you to easily
change the polarity of the connected wire feeding equipment or
switch to stick welding or air/carbon arc cutting.
NA-3 AUTOMATIC WIRE FEEDER
Set the DC-600 Output Control Switch to Remote. Note:
1.
Later model NA-3 automatic wire feeders are capable of
cold starts when the NA-3 Mode switch is in the CV or CC
mode position. Some earlier models are capable of cold
starting only in the CC mode position. Cold starting enables
you to inch the wire down to the work, automatically stop,
and automatically energize the flux hopper valve.
2. Set the DC-600 welding mode switch for the desired
process: CV Submerged Arc, CV Innershield mode or CC
mode.
3. Set the NA-3 mode Switch Position to either CV or CC to
match the DC-600 mode selected in step 2.
4. Refer to the NA-3 operators manual for instructions on how
to use the NA-3 in conjunction with the DC-600.
5. Follow the following guidelines for good arc striking detailed
below for each welding mode.
GOOD ARC STRIKING GUIDELINES FOR THE NA-3 WITH THE
IDEALARC DC-600
SUBMERGED ARC OR CC STICK WELDING MODES.
be
Following are some basic arc striking techniques that apply to all
wire feed processes. Using these procedures should provide
trouble-free starting. These procedures apply to single, solid wires
and Innershield wires.
1. Cut the electrode to a sharp point.
2. Set the NA-3 Open Circuit Voltage Control to the same dial
setting as the Arc Voltage Control. If this is a new welding
procedure, a good starting point is to set the Open Circuit
Voltage Control to # 6.
Note: The open circuit voltage of the IDEALARC DC-600 varies
from approximately 16 volts to 56 volts in the CV Innershield or CV
Submerged Arc modes. The open circuit voltage is constant in the
CC Stick mode.
3. Run a test weld. Set proper current, voltage, and travel
speed.
a. For the best starting performance, the NA-3 Open
Circuit Voltage Control and Voltage Control setting
should be the same. Set the Inch Speed Control for the
slowest inch speed possible.
b. To adjust the Open Circuit Voltage Control to get the
best starting performance, make repeated starts
observing the NA-3 voltmeter.
When the voltmeter pointer swings smoothly up to the desired arc
voltage, without undershooting or overshooting the desired arc
voltage, the Open Circuit Voltage Control is set properly.
If the voltmeter pointer overshoots the desired voltage and then
returns back to the desired voltage, the Open Circuit Voltage
Control is set too high. This can result in a bad start where the
wire tends to "Blast off."
If the voltmeter pointer hesitates before coming up to the desired
voltage, the Open Circuit Voltage Control is set too low. This can
cause the electrode to stub.
4. Start and make the weld.
a. Cold starts. For cold starts, be sure the work piece is
clean and the electrode makes positive contact with the
work piece.
b. Hot "On the Fly" starts. For hot starts, travel should
begin before the wire contacts the work piece.
Idealarc DC-600
IN THE CV INNERSHIELD,
Page 13
CV