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The
Workhorse TIGweld 300ST
Capacitor
Discharge Arc Starter TIG
WORKHORSE
:
"A
markedly useful or durable machine"...... Webster Dictionary
The
Workhorse TIGweld 300ST is a very rugged capacitor discharge
arc starter TIG/Stick welding machine, weighing approximately 80lbs/36.3Kgs,
and designed specifically for demanding TIG welding where the tungsten
(wolfram) electrode is not allowed to touch the base metal which
could cause contamination of the weld. The underlying design concept
was to employ proven electrical and mechanical technologies and
build a “no-nonsense”, cost-effective machine where usability,
reliability and ruggedness are the most important design parameters.
This in combination with a capacitor discharge arc starter makes
the Workhorse TIGweld 300ST a remarkable TIG machine. The
single pulse starting the arc does not produce radio noise, which
can interfere with cell phones and other communication systems.
For this reason, the capacitor discharge TIG welder is a better
solution than high frequency (HF) systems, which do cause interference.
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- TIG
and Stick welding current from 10 - 400 Amperes in 2
ranges.
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- Available
in dual primary voltage, 240V (single or three phase)
and 480V. Also available in single voltage 240V, 480V,
575V and 400V.
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- Easy
to strike the arc. The spark jumps half an inch in argon
gas and stops when the TIG arc is established. The Workhorse
300ST even has an inside adjustable pre flow and post
flow.
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- Carbon
arc gouging protection. (Circuit design that eliminates
the harmful currents caused during arc gouging has been
added)
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- Constant-Arc-Power
characteristic means less dependence on a steady hand
to achieve a good weld and reduces risk for electrode
“sticking”. The Constant-Arc-Power characteristic
is, if possible, even more advantageous when TIG welding
than when stick welding. The TIG arc remains the same
cylindrical shape without flaring out when increasing
the arc length. The Constant-Arc-Power characteristic
makes burn-through almost impossible when increasing
the arc length. This means that you can forget about
holding a constant arc length, which makes TIG welding
much easier.
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- Smart
surge control reduces weld puddle agitation caused by
big drops from low hydrogen electrodes, eliminating
a major cause of slag inclusions in the weld.
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- Inverter
circuitry allows for low weight (80lbs/36Kg) and rugged
design.
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- Fiberglass
enclosure allows for rough handling in demanding, tough
environments.
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- The
case has extra thick “skids” on the bottom
case as part of the design protecting the welder when
dragged on almost any surface.
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- Foldable
handles with built-in grooves, as well as ridges in
the case, makes nesting of units easy and practical.
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- Units
can be connected in parallel for higher current or in
series for higher voltage, should there be a need.
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MECHANICAL DESIGN
The Workhorse 300ST provides exceptional ruggedness and durability
in tough and demanding environments such as construction, shipbuilding,
nuclear power plants, and offshore welding. The case is made out
of solid fiberglass, which provides sturdier resistance to dents
and forces than a sheet metal case.
ELECTRICAL DESIGN
The Workhorse 300ST uses an SCR inverter design for its power supply.
The inverter design allows for an industrial welding machine weighing
only 79lbs/36kgs. We have chosen the proven SCR component instead
of the IGBT because of reliability. We have strong indications from
the market that SCRs are up to 100 times more reliable in welding
applications.
TIG Welding
The Arc Start feature allows no contact between material and torch.
The Arc Start feature is therefore the best solution for critical
TIG welding.
Smart Hot Start
Brings the puddle temperature up quickly for good initial penetration.
The amount of Hot Start is dependent on the weld puddle temperature.
The Workhorse 300ST measures the time in between welds. The longer
the period between stopping and starting, the greater the Hot Start
current. If the arc is broken for less than a second, the Hot Start
is eliminated. This prevents the puddle from overheating and burning
through.
Thermostat-controlled Cooling Fan
The cooling fan starts automatically when welding current exceeds
100 A. If the current drops below 100 A, the fan will stop after
approximately 6 minutes. If the fan is operating when the work is
discontinued, the fan will continue to run and stop after approximately
six minutes.
Option – The Seahorse (learn
more...)
What is The Seahorse? The Seahorse is a corrosion resistant version
of any Workhorse welder produced by ARCON Welding. The Seahorse
is designed specifically to protect the welder in corrosive and
hazardous atmospheres such as mines, shipyards, chemical plants
or paper mills, or in other environments where corrosion or conductive
atmospheres can have a harmful effect on a welder. Please see the
separate write up, “The Seahorse” Specifications”,
for additional information on this alternative.
Option – The Warhorse
The Warhorse 300ST is a 400V or 480V welder designed to protect
the machine from voltage spikes and over voltage surges commonly
found in environments with very “dirty” power distribution
system, such as power plants and shipyards and some generators.This
high resistance to surges and spikes has been achieved by vastly
increasing the capacity of existing surge protection circuits, adding
new surge protectors and by using high voltage rated components
in critical parts of the inverter circuits.
Safety, Warranty and Service
The welding units are designed to meet UL551 and CE requirements.
The units come with a factory warranty and user manual.
Service will be taken care of by the factory or can in many cases
be performed locally by your service authorized Distributor.
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