Set The Wire Feed Speed (Wfs); Start The Arc; Set The Voltage; Travel Speed - Lincoln Electric INNERSHIELD Series Welding Instruction Manual

WELDING TECHNIQUES
SET THE WIRE FEED SPEED
Adjust the wire feed speed using the WFS control on the wire
feeder. Set to the suggested procedures. See pages 30-39. The
approximate amperage corresponding to each WFS at the
specified CTWD is also listed in the table. Amperage depends on
wire feed speed and CTWD. If the CTWD is shortened, amperage
will increase. If a wire feed speed meter is not available it may be
measured by running the wire out for 6 seconds, then measure the
length of wire fed and multiply by 10 to get the WFS in inches per
minute (in/min).

START THE ARC

With the proper visible CTWD set, position the gun with the wire
lightly touching the work. Avoid pushing the wire into the joint
before starting the arc. Press the gun trigger to start the weld.
Release the trigger and pull the gun from the work to stop the arc.
Some welders accustomed to manual welding with stick electrode
tend to push the wire into the joint as it burns away. Since the wire
is mechanically fed, this must be avoided.

SET THE VOLTAGE

Adjust the voltage to the suggested procedures as measured by
the wire feeder voltmeter or voltmeter placed between the wire
feeder contact block and workpiece. See pages 30-39. The
presence of surface porosity indicates that the arc voltage is too
high and should be lowered. An excessively convex or ropey bead
indicates that the voltage is too low. Increase the voltage setting to
reduce the convexity or ropey appearance of the bead. Also,
check for poor work cable connections, undersized or damaged
work cables, and poor cable clamps.

TRAVEL SPEED

As in all welding processes, use a travel speed which keeps the
arc at the front edge of the weld puddle and produces the desired
weld size. Maintain a uniform travel speed. The best way to do this
is to maintain a uniform distance between the wire and the molten
slag behind the wire. Travel speed is usually faster with Innershield
wire than with stick electrodes because of the higher deposit rate.
Many welders tend to move too slowly when they first weld with
Innershield wire.
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