-20 -
the welding has been finished, especially
in unapproachable places.
After welding has been finished, let the
machine cool down for at least ten min
utes. If the machine has not been cooled
down, there is a high increase of tem
perature inside, which can damage power
elements.
SECURITY OF WORK WHILE
WELDING OF METALS CONTAIN-
ING LEAD, CADMIUM, ZINK,
MERCURY AND GLUCINUM
Make specific precautions if you weld
metals containing these metals:
•
Do not carry out welding processes
on gas, oil, fuel etc. tanks (even
empty ones) because there is
the risk
of an explosion. Welding can be
carried out only according to spe-
cific regulations!!!
•
In spaces with the risk of an explo-
sion there are specific regulations
valid.
•
Before any interference in electri-
cal part, removing the cover or
cleaning it is necessary to switch
off the machine from the supply.
ELECTRICAL SHOCK
PREVENTION
•
Do not carry out repairs
with the generator live
•
Before carrying out any mainte-
nance or repair activities, disconnect
the machine from the mains.
•
Ensure that the welder is suitably
earthes.
•
The equipment KIT 169 must be
installed and run by qualified per-
sonnel.
•
All connections must comply with
the regulations in force (CSN EN
60974-1) and with the aqccident
prevention laws.
•
Do not weld with worn or loose
wires. Inspect all cables frequently
and ensure that there are no insula-
tion defects, uncovered wires or
loose connections.
•
Do not weld with cables of insuffi-
cient diameter and stop soldering if
the cables overheat, so as to avoid
rapid deterioration of the insulation.
•
Never directly touch live parts.
After use, carefully replace the torch
or the electrode holding grippers,
avoiding contact with the parts con-
nected to earth.
SAFETY REGARDING
WELDING FUMES AND
GAS
•
Carry out purification
of the work area, from gas and
fumes emitted during the welding,
especially when welding is carried
out in an enclosed space.
•
Place the welding system in a well
aired place.
•
Remove any traces of varnish that
cover the parts to be welded, in or-
der to avoid toxic gases being re-
leased. Always air the work area.
•
Do not weld in places where gas
leaks are suspected or close to inter-
nal combustion engines.
•
Keep the welding equipment away
from baths for the removal of grease
where vapours of trichlorethylene or
other chlorine containing hydrocar-
bons are used as solvents, as the
welding arc and the ultraviolet ra-
diation produced by it react with
such vapours to form phosgene, a
highly toxic gas.
PROTECTION FROM
RADIATION, BURNS AND
NOISE
•
Never use broken or
defective protection masks
•
Do not look at the welding arc
without a suitable protective shield
or helmet
-29 -
•
Upper display switches on during
welding process only when electron-
ics makes meausurements and shows
welding current A After about 7 sec.
display switches off automatically
again. Thus electronics increases ori-
entation while reading parameters
during adjustment.
•
Upper display shows only welding
current.
•
Bottom display shows welding volt-
age while welding and other values –
time, speed etc. during adjustment.
•
LED diode SETTING will switch off
during welding process only when a
digital voltampermeter is used.
•
LED diode SETTING is on during
welding only when operating staff is
adjusting and changing speed of wire
shift with a poteciometer or a remote
control UP/DOWN. As soon as oper-
ating staff stops adjustment of a pa-
rameter, LED diode SETTING will
be switched off automatically within
3 sec. and display shows value of
welding voltage.
PRINCIPLE OF MIG/MAG WELD-
ING
Welding wire is lead from the roller into
the flow drawing tie with the use of
thefeed. Arc joins thawing wire electrode
with welding material. Welding wire
functions as a carrier of the arc and as the
source of additional material at the. same
time. Protective gas flows from the
spacer which protects arc and the whole
weld against the effects of surrounding
atmosphere.
ADJUSTMENT OF WELDING PA-
RAMETERS
For approximate adjustment of welding
current and voltage with MIG/MAG
methods corresponds with empirical
relation U = 14 + 0.05 x I . According to
this relation we can asses required ten-
sion. During adjustment of the tension,
we must take into account with its de-
crease at loading by welding. Decrease
of tension is approximately 4.8V to 100
A. Adjustment of welding current is done
so that for chosen welding tension set
required welding current by increasing or
decreasing of the speed of wire feed or
we tune the tension so that the welding
arc is stable. For good quality of welds
and optimal adjustment of welding cur-
rent it is necessary to reach the distance
of drawing die from material of ap-
proximately 10 x of welding wire (pic.
5). Dipping of drawing die in gas tube
should not extend 2 – 3 mm.
Welding work cycles
W
elding machines KIT work in four
working cycles:
•
continuous two-cycle time
•
continuous four-cycle time
•
spot welding two-cycle time
•
pulse welding two-cycle time
•
pulse welding four-cycle time
Adjustment of the machines for these
work cycles is done through two
switches with potentiometers (pic.1 pos.
6 and 7). On the control panel there are
shown their functions in schemes.
TWO-STROKE CYCLE
Welding process is started by only the
pressing the switch of the torch. The
switch must always be held during the
welding process and it can be interrupted
releasing the switch of the torch.
gas opening
tip holder
welding tip
welding arc
wire feeder rolls
welding wire
gas nosle
protection gas
welding
piece
