User Manual

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UL551 (8 Ed.)
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(Example Data Plate)
If you exceed the duty cycle of the welder, the thermal protection system will engage, shutting off all welder output.
After cooling, the thermal protector will automatically reset and the welding functions can resume. This is normal
and automatic behavior of the machine, and does not require any user action. However, you should wait at least
ten minutes after the thermal protector engages before resuming welding. You must do this even if the thermal
protector resets itself before the ten minutes is up or you may experience less than specified duty cycle performance.
CAUTION: DO NOT REGULARLY EXCEED THE DUTY CYCLE OR DAMAGE TO THE
WELDER CAN RESULT.
An important factor in making a satisfactory weld is preparation. This includes studying the process and equipment
and practicing welding before attempting to weld finished product. An organized, safe, ergonomic, comfortable,
and well-lit work area should be prepared for the operator. The work area should specifically be free of all
flammables with both a fire extinguisher and a bucket of sand available.
To properly prepare for welding with your new welder, it is necessary to:
• Read the safety precautions at the front of this manual.
• Prepare an organized, well-lit work area.
• Provide protection for the eyes and skin of the operator and bystanders.
• Attach the ground clamp to the bare metal to be welded, making sure of good contact.
• Make sure that the wire-roller groove in the roller corresponds to the diameter and type of wire being used.
• Plug the machine into a suitable outlet.
EXPOSURE TO A WELDING ARC IS EXTREMELY HARMFUL TO THE EYES AND
SKIN. PROLONGED EXPOSURE TO A WELDING ARC CAN CAUSE BLINDNESS
AND BURNS. NEVER STRIKE AN ARC OR BEGIN WELDING UNLESS YOU ARE
ADEQUATELY PROTECTED. WEAR FIRE RESISTANT WELDING GLOVES, HEAVY
LONG SLEEVED SHIRT, CUFF-LESS PANTS; HIGH TOPPED SHOES AND A
WELDING HELMET.
Some experience is required to adjust and use a FCAW welder. In FCAW welding, two parameters are
fundamental: the welding voltage and the wire feed speed. The resulting welding current is a result of these two
settings but is more directly related to the wire feed speed.
• Set the voltage (LEFT KNOB) (4) and wire feed speed (RIGHT KNOB) (5) to positions suitable for the thickness of
the material to be welded (See “FCAW Set-Up Chart”, page 18). Welding current varies in relationship to wire
feed speed. For low wire feed speed (RIGHT KNOB), welding current output will be low. Turning the wire feed
speed control clockwise will result in increased wire feed speed and welding current. Welding voltage should
Internal Thermal Protection
Welding Preparation
Factors to Consider for Best FCAW Welding Results