Miller Electric KC237900 User Manual
Page 23
OM-530 Page 19
soon as an arc is struck, the spot weld timer begins tim-
ing out. The remote contactor control switch must re-
main closed throughout the entire spot welding time in-
terval. If the remote contactor control switch is released
prior to the completion of the spot weld cycle, spot weld
output ceases and the spot weld timer will reset for the
next cycle. After completion of the spot weld cycle, the
remote contactor control switch must be released to re-
set the spot weld timer.
Whenever the SPOT TIME switch is in the ON position,
the AMPERAGE switch on the TIG-Unit can be placed
in either the PANEL or REMOTE position to suit the de-
sired application. However, the OUTPUT (CONTAC-
TOR) switch on the welding power source must be in the
REMOTE position.
SECTION 5 – SEQUENCE OF OPERATION
WARNING: ELECTRIC SHOCK can kill;
MOVING PARTS can cause serious injury;
IMPROPER AIRFLOW AND EXPOSURE TO
ENVIRONMENT can damage internal parts.
•
Do not touch live electrical parts.
•
Keep all covers and panels in place while
operating.
Warranty is void if the Tig-Unit is operated with
any portion of the outer enclosure removed.
ARC RAYS, SPARKS, AND HOT SURFACES
can burn eyes and skin; NOISE can damage
hearing.
•
Wear correct eye, ear, and body protection.
FUMES AND GASES can seriously harm
your health.
•
Keep your head out of the fumes.
•
Ventilate to keep from breathing fumes and
gases.
•
If ventilation is inadequate, use approved
breathing device.
HOT METAL, SPATTER, AND SLAG can
cause fire and burns.
•
Watch for fire.
•
Keep a fire extinguisher nearby, and know
how to use it.
•
Do not use near flammable material.
•
Allow work and equipment to cool before
handling.
MAGNETIC FIELDS FROM HIGH CUR-
RENTS can affect pacemaker operation.
•
Wearers should consult their doctor before
going near arc welding, gouging, or spot welding
operations.
See Arc Welding Safety Precautions in the
welding power source Owner’s Manual for basic
welding safety information.
5-1. GAS TUNGSTEN ARC WELDING
WARNING: Read and follow safety informa-
tion at beginning of entire Section 5 before
proceeding.
1.
Make all necessary connections as instructed in
Section 4.
IMPORTANT: For Gas Tungsten Arc Welding applica-
tions, place both the AMPERAGE and the OUTPUT
(CONTACTOR) switches on the welding power source
in the REMOTE 14 position.
2.
Connect the shielding gas supply hose to the side of
the GAS valve labeled IN under the front access
door (see Section 3-11).
3.
Connect the coolant supply hose to the side of the
COOLANT valve labeled IN under the front access
door (see Section 3-12).
4.
If remote control of any type (amperage, contactor,
etc.) is desired, connect the remote control to the
REMOTE receptacle under the front access door
on the TIG-Unit. (See Section 3-10 and Figure 4-1.)
5.
Place the GAS/COOLANT switch in the ON posi-
tion (see Section 4-3).
6.
Place the HIGH FREQUENCY switch in the ON po-
sition and rotate the HIGH FREQUENCY control to
the desired position (see Sections 4-6 and 4-7).
7.
Place the POLARITY switch in the desired position
(see Section 4-2).
8.
Place the AMPERAGE switch in the desired posi-
tion. Rotate the AMPERAGE ADJUSTMENT con-
trol to the desired position (see Section 4-1).
9.
If the unit is equipped with a Pulser, and the arc puls-
ing function is desired, place the PULSES switch in
the ON position and adjust the Pulser controls as in-
structed in Sections 4-9 thru 4-12. If arc pulsing is
not desired, place the PULSES switch in the OFF
position.
10. If the unit is equipped with an Electroslope, and the
sloping function is desired, place the ELECTRO-
SLOPE switch in the ON position and adjust the
Electroslope controls as instructed in Sections 4-14
thru 4-18. If sloping is not desired, place the Electro-
slope switch in the OFF position.
IMPORTANT: If an Electroslope is used, the AMPER-
AGE switch on the TIG-Unit must be in the PANEL posi-
tion.
11. Wear dry insulating gloves and clothing, and wear
welding helmet with proper filter lens according to
ANSI Z49.1.
12. Prepare for welding as follows:
a.
Connect work clamp to clean, bare metal at
workpiece.