11
holder to prevent accidental tungsten contact with
the conductive surfaces of the work area.
Stick:
The stick function is fairly simple and straight forward.
Be sure to flip the torch switch towards the stick icon
before starting to weld, or poor performance may
result. Arc striking can be done quite easily with prac-
tice and the hot start reduces sticking. As with any
type of welding, this takes practice. Be sure to double
check (especially after TIG welding) that the electrode
holder cable is located in the positive terminal, and the
work clamp is located in the negative terminal. See
page 16 for arc striking technique and general rod size
selection. Rod size while operating on 120V volt is gen-
erally limited to 3/32” max diameter electrode. Rod
size while operating on 240V is generally limited to
1/8” diameter electrode. Oversizing a rod will increase
sticking and can create undesirable cold lap.
3.3 Handling and general maintenance
.
Duty Cycle and Overcurrent.
Be careful to observe the duty cycle of the welder.
Overheating may occur if the duty cycle is exceeded.
Overheating will cause the unit safety cutout to en-
gage, subsequently interrupting output. Allow the unit
to rest while remaining switched on for 10 –15 minutes
if the safety cut out has triggered. After that, reset the
unit by cycling the main power switch on the rear.
High heat and humid conditions will also affect the
duty cycle of the welder. If the unit overheats or an
overcurrent condition is experienced, the duty cycle
light will light as well. Welding will resume once the
duty cycle light is cleared. If the light is red, this is usu-
ally indicates an over/under current condition. An over
current or under current condition is usually caused by
dirty power conditions, over/under voltage power sup-
ply or an internal fault. If the light is green or yellow
green, this a duty cycle issue. In either case, if the
light does not clear and the unit does not resume
welding output, by cycling the power switch after the
required amount of rest, contact Everlast.
Note: The duty cycle is 35% at the maximum output
of 140 amps while operating on 240V. Maximum amp
output will be reduced to 80(±) amps while operating
on 120V to limit current draw. The Duty cycle is re-
adjusted to 35% at 80 amps while operating on 120V.
The unit should be stored in a dry place for long term
storage.
Humid/wet conditions can contribute to the
eventual decay of the circuitry in the machine. For
safety reasons, do not use this machine directly in the
rain or with soaked clothing or damp protective gear.
The service rating for this unit is IP21S, and is not de-
signed for wet environment use.
Use the carry strap or handle provided to lift the
welder.
Do not suspend the unit in the air by the
strap or handle.
Make sure that the unit
’
s cooling fan and exhaust
vents are kept free of obstruction.
Before every oper-
ation, inspect unit for unexpected obstructions such as
insect and vermin nests. Once a month, or as needed,
clean the machine thoroughly inside and out with com-
pressed air.
Before removing the covers however, un-
plug the welder for 30 minutes to allow the internal
capacitors to discharge to prevent shock, injury and
even death.
Afterwards, open the units by removing
the rear plastic cover and the metal cover only. Do not
remove the front cover. Do not remove and circuit
boards unless authorized. Check all plugs and connec-
tions for tightness before replacing the covers. Do not
pinch any wires when reinstalling the covers. Wear
safety glasses to prevent eye injury from flying parti-
cles that may get dislodged while cleaning with com-
pressed air. Do not concentrate compressed air on the
skin or injury may occur.
GENERAL SETUP AND OPERATION
Section 2
Содержание POWERARC 140ST
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