P.I.T. PMI140-C, Operation Manual

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Inverter Welding Machine
5
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Power voltage can be found in diagram of
main technical data. Automatic compen-
sation circuit of voltage will assure that
welding current keeps in allowable range.
If power voltage is exceeding allowable
range limited, it will damage to compo-
nents of machine. The operator should un-
derstand this situation and take preventive
measures.
►
There is a grounding screw behind welding
machine, with a grounding marker on it.
Before operation, welding crust must be
grounded reliable with cable which section
is over 6 square millimeter, in order to pre-
vent from static electricity, and accidents
because of electricity leaking.
►
If welding time is exceeded duty cycle
limited, welding machine will stop working
for protection. Because machine is over-
heated, temperature control switch is on
“ON’’ position and the indicator light is red.
In this situation, you don’t have to pull the
plug, in order to let the fan cool the ma-
chine. When the indicator light is off, and
the temperature goes down to the stan-
dard range, it can weld again.
Questions to be run into during
welding
►
Fittings, welding materials, environment
factors, power supply can affect welding
performance.
►
Make sure quality of tungsten electrode is
high .
►
If the electrode contains moisture, it will
cause unstable arc, welding defect in-
crease and poor quality.
►
If the extra-long cable is used, the output
voltage will be a ected, so please shorten
the cable.
►
When power voltage deviates from the
rated value, it will a ect output current ac-
cordingly; When input voltage is lower than
rated value, the max output may be lower
than rated value.
Maintenance and Service
Maintenance and Cleaning
►
Pull the plug out of the socket before
carrying out any work on the power
tool.
►
Remove dust by dry and clean com-
pressed air regularly.
If welding machine
is operated in environment where strong
smoke and polluted air is present, the ma-
chine needs to be cleaned at least once a
month.
be similar to how you light a match. This is
the correct arc ignition method.
Attention! Do not knock the electrode on the
working surface when trying to ignite the arc,
as this can damage it and further complicate
the ignition of the arc.
►
As soon as the arc strikes, the electrode
must be held on such distance from the
processed material, which corresponds
to the diameter of the electrode. To obtain
a uniform seam, it is further necessary
to maintain this distance as constant as
possible. It should also be remembered
that the tilt of the electrode axis should be
approximately 20-30 degrees.
►
When fi nishing the weld, pull the electrode
back a little to fi ll the weld crater and then
lift it sharply until the arc disappears.
►
If the thermal protection is triggered during
operation (indicator 4 turns on), the device
automatically turns off. It is necessary to
turn off the device for 20 minutes in order
for it to cool down, and after that you can
continue to work.
Safety norms
The welding machine is installed with protec-
tion circuit of over voltage, over current and
overheat. When voltage, output current and
temperature of machine exceed the required
standard, welding machine will stop working
automatically. However, overuse (such as
over voltage) will still result in damage to the
welding machine. To avoid this, the user must
pay attention to the following.
►
The working area is adequately ventilat-
ed
The welding machine is powerful machine,
when it is being operated, it generated by
high currents, and natural wind will not
satisfy machine cool demands. So there is
a fan in inner-machine to cool down ma-
chine. Make sure the intake is not in block
or covered, it is 0.3 meter from welding
machine to objects of environment. User
should make sure the working area is ad-
equately ventilated. It is important for the
performance and the longevity of the ma-
chine.
►
Do not overload
The operator should remember to watch
the max duty current (Response to the se-
lected duty cycle). Keep welding current is
not exceed max duty cycle current. Over-
load current will damage and burn up ma-
chine.
►
No over voltage