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1.8 PROTECT YOURSELF AND OTHERS!
Some welding, cutting, and gouging processes are noisy and require ear protection. The arc, like
the sun, emits ultraviolet (UV) and other radiation and may injure skin and eyes. Hot metal can
cause burns. Training in the proper use of welding processes and equipment is essential to
prevent accidents.
1. Always wear safety glasses with side shields in any work area. In conjunction with eye
protection, welding helmets or face shields are also required.
2. Use a face shield fitted with the correct filter cover plates to protect your eyes, face, neck,
and ears from sparks and rays of the arc when operating or observing operations. Warn
bystanders not to watch the arc and not to expose themselves to the rays of the electric
arc or hot metal.
3. Wear flameproof type gloves, heavy long-sleeve shirt, cuff less trousers, and a welding
helmet or cap for hair protection, to protect against arc rays and hot sparks or hot metal.
A flameproof apron may also be desirable as protection against radiated heat and
sparks.
4. Hot sparks or metal can lodge in rolled up sleeves, trouser cuffs, or pockets. Sleeves and
collars should be kept buttoned, and open pockets eliminated from the front of clothing.
2. PRODUCT DESCRIPTION AND INFORMATION
2.1 INTRODUCTION TO THE WORKHORSE 300S
The Stickweld 300S is a portable welder using an inverter-type power supply to generate the
output power.
The Stickweld 300S is primarily designed for stick welding (SMAW). It can also be used for TIG
(GTAW) welding, using the Lift Start principle, as well as arc gouging and stud welding. Use
Range I when stickwelding, when possible. The first range produces a softer arc than that of
Range 2.
The Workhorse Stickweld 300S
is available in the following models: 240V single voltage
operating in single phase or three-phase; 480V single voltage operating in three-phase; 575V
single voltage in three-phase, 240-480V dual voltage, and 400 V single voltage operating in
three-phase. The three-phase supply voltage is connected to a circuit breaker and then to a
three-pulse rectifier cicuitry and a radio noise suppression module. The AC voltage is connected
to a step-down transformer to power the welder. The AC welding voltage is first rectified to
create a DC welding current. The control logic measures the welding voltage and welding
current. It also makes the inverter create the suitable welding characteristics. The fan control
starts and stops the cooling fan. The auxiliary transformer steps down the input voltage to 48V
centertapped. This transformer powers the cooling fan and the contol logic.
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