Maintenance - Urrea SOLM1020-BV Manual De Usuario

must frequently chip off slag and change weld-
ing electrodes. GMAW requires only that the
operator guide the welding gun with proper
position and orientation along the area being
welded. Keeping a consistent contact tip-to-
work distance (the stick out distance) is impor-
tant, because a long stickout distance can cause
the electrode to overheat and will also waste
shielding gas. Stickout distance varies for dif-
ferent GMAW weld processes and applications.
For short-circuit transfer, the stickout is gener-
ally 1/4 inch to 1/2 inch, for spray transfer the
stickout is generally 1/2 inch. The position of
the end of the contact tip to the gas nozzle are
related to the stickout distance and also varies
with transfer type and application. The orien-
tation of the gun is also important—it should
be held so as to bisect the angle between the
workpieces; that is, at 45 degrees for a fillet
weld and 90 degrees for welding a flat surface.
The travel angle, or lead angle, is the angle of
the torch with respect to the direction of travel,
and it should generally remain approximately
vertical. However, the desirable angle changes
somewhat depending on the type of shielding
gas used—with pure inert gases; the bottom of
the torch is often slightly in front of the upper
section, while the opposite is true when the
welding atmosphere is carbon dioxide.
WHEN FINISHED
a. Release the Torch handle trigger and lift the
Torch handle from the workpiece.
b. Press the Power Switch to the Off (O) position.
c. Set the Torch handle down on the metal
workbench.
d. Turn the air supply off.
e. Unplug the line cord from the electrical out-
let.
PENETRATION
1. Excess or Burn-through : Weld droops on top
and underneath, or falls through entirely, mak-
ing a hole.
a. Excessive material at weld; Reduce wire feed
speed
b. Overheating; Increase welding speed and en-
sure that welding speed is kept steady.
2. Proper: Weld is visible underneath and bulges
slightly on top.
3. Inadequate: Weld does not contact the joint
fully, just on the surface.
a. Work pieces too thick/close; Joint design must
allow weld to reach bottom of groove and al-
low proper welding procedures.
M a n u a l d e u s u a r i o • U s e r 's m a n u a l
b. Incorrect welding technique; Maintain 1/2"or
less stick out. Keep arc on leading edge of
weld puddle. Hold gun at proper angles.
c. Insufficient weld material; Increase wire feed
speed.
d. Insufficient weld heat; Reduce Welding
Speed.
NOT ADHERING PROPERLY
Gaps present between weld and previous bead
or between weld and workpiece.
a. Dirty workpiece; Make certain that workpiece
is clean and free from oil, coatings, and other
residues.
b. Insufficient weld material; Increase wire feed
speed.
c. Incorrect welding technique; Place stringer
bead at correct place in joint. Adjust work-
piece position or weld angle to permit proper
welding at bottom of work- piece.
Pause briefly at sides when using a weave
bead. Keep arc on leading edge of weld
puddle. Hold gun at proper angles and make
tack welds to help hold pieces.
BENT AT JOINT
a. Improper clamping; Make sure that pieces are
clamped securely in place.
b. Excessive heat; Weld a small portion and al-
low cooling before proceeding. Reduce wire
feed speed.

MAINTENANCE

WARNING: Make sure the Power Switch of
the Plasma welder is in its "OFF" position and
that the tool is unplugged from the electrical
outlet before performing any inspection, main-
tenance, or cleaning procedures.
1. Periodically open the Access Panel from the
machine and, using compressed air, blow out all
dust and debris from the interior
2. Always store the welder in a clean, dry, safe
location out of reach of children and other un-
authorized people.
For optimal weld quality, clean and inspect the
contact tip and nozzle before each use, as fol-
lows: Nozzle Inspection, cleaning;
a. Turn the Nozzle (1b) counterclockwise while
pulling to remove.
b. Scrub the interior of the Nozzle clean with a
wire brush.
c. Examine the end of the nozzle(1a).The end
should be flat and even, If the end is uneven,
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