2) In the welding interface, rotate L Knob to set the wire feed rate and rotate R Knob to set the
welding current;
3) After the settings, press L Knob and R Knob for confirmation;
3.1.4 Wire Feed Roller Selection
The importance of smooth consistent wire feeding during MIG welding cannot be emphasized
enough. Simply put the smoother the wire feed then the better the welding will be.
Feed rollers or drive rollers are used to feed the wire mechanically along the length of the welding
gun. Feed rollers are designed to be used for certain types of welding wire and they have different
types of grooves machined in them to accommodate the different types of wire. The wire is held
in the groove by the top roller of the wire drive unit and is referred to as the pressure roller,
pressure is applied by a tension arm that can be adjusted to increase or decrease the pressure as
required. The type of wire will determine how much pressure can be applied and what type of
drive roller is best suited to obtain optimum wire feed.
Solid Hard Wire
- like Steel, Stainless Steel require a drive roller with a V shape groove for
optimum grip and drive capability. Solid wires can have more tension applied to the wire from the
top pressure roller that holds the wire in the groove and the V shape groove is more suited for this.
Solid wires are more forgiving to feed due to their higher cross sectional column strength, they
are stiffer and don’t bend so easy.
Soft Wire
- like Aluminium requires a U shape groove. Aluminium wire has a lot less column
strength, can bend easily and is therefore more difficult to feed. Soft wires can easily buckle at the
wire feeder where the wire is fed into inlet guide tube of the torch. The U-shaped roller offers
more surface area grip and traction to help feed the softer wire. Softer wires also require less
tension from the top pressure roller to avoid deforming the shape of the wire, too much tension
will push the wire out of shape and cause it to catch in the contact tip.
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ADVANCEMIG 255C
