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POLARITY
SELECTION
The welding
terminals
are labeled "+'I
I(positive)
and "-"
(negative).
Changing the polarity of the cables will affect the weld. The correct polarity
selection is dependent on the type of electrode you are using and the type
of material you are welding;
refer to the el,ectrode manufacturer's
recom-
mendations
for best results.
For straight
polarity,
attach the electrode'cable
to the negative terminal,
and attach the work cable to the positive, terminal.
To change to reverse
polarity,
reverse the cables.
STRAIGHT
POLARITY
REVERSE
POLARITY
WORK
CABL
ELECTRODE
WELDING
DUTY
CYCLE
The duty cycle is the percentage of time that the welder can be operated in
a given 10 minute period.
For example, at a rated output of 130 amperes, the EXW17 1 S's duty cycle
is 50%. This means that at 130 amperes, welding can be performed for a
total of 5 minutes out of every IO minute period. The duty cycle is longer at
lower operating
currents,
and shorter at h'igher currents.
Current
170A
Rate
15%
150A
25%
130A
5b%
IIOA
Below
90A
65%
100%
CAUTION:
Do not operate
the welder
beyond
its duty cycle;
doing so will
decrease
the performance
and service
life of the generator/welder.
24
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