Würth MIG 180-5, Manual

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5.5. Lower your welding helmet and pull the trigger on the torch to start an arc, then begin to drag the
torch towards you, while simultaneously turning the Wire Speed Dial counter-clockwise.
5.6. LISTEN! While decreasing wire speed, the sound that the arc produces will change from a
sputtering to a high-pitched buzzing sound and then will begin sputtering again if you decrease
the wire speed too much. The position of the wire speed adjustment knob where the high-pitched
buzzing sound is achieved represents the correct setting. You can use the wire speed control to
slightly increase or decrease the heat and penetration for a given heat setting by selecting higher
or lower wire speed settings. Repeat this tune-in procedure if you select a new heat setting, a
different wire diameter, or a different type of welding wire.
6. Welding Techniques
WARNING
Exposure to a welding arc is extremely harmful to your eyes and skin!
Prolonged exposure to the welding arc can cause blindness and burns. Never strike an arc or begin
welding until you are adequately protected. Wear flameproof welding gloves, a heavy long sleeved
shirt, trousers without cuffs, high topped shoes and an ANSI approved welding helmet.
Electric shock can kill!
To prevent ELECTRIC SHOCK, do not perform any welding while standing, kneeling, or lying directly
on the grounded work.
6.1 Moving the torch
Torch travel refers to the movement of the torch along the weld joint and consists of two action elements:
Direction and Speed. A solid weld bead requires that the welding torch be moved steadily and at the
right speed along the weld joint. Moving the torch too fast, too slow, or erratically will prevent proper
fusion or create a lumpy, uneven bead.
Travel direction is the direction the torch moved along the weld joint in relation to the weld puddle.
The torch is either PUSHED into the weld puddle or PULLED away from the weld puddle.
For most welding jobs you will pull the torch along the weld joint to take advantage of the greater weld
puddle visibility.
Travel speed is the rate at which the torch is being pushed or pulled along the weld joint. For a fixed
heat setting, the faster the travel speed, the lower the penetration, and lower and narrower the finished
weld bead. Likewise, the slower the travel speed, the deeper the penetration and the higher and wider
the finished weld bead.
Push
Pull
Weld
Puddle