Inductance Control (Mig/Mag Only); Arc Force Adjustment (Mma/Stick Only) (Weldforce 175Mst Only) - Weldclass Weldforce 155M Operating Instructions Manual

Table of Contents

4.3 Inductance Control (MIG/MAG only)

This setting changes the MIG waveform to simulate changing the inductance of the welding circuit.

Inductance controls the rate of the current rise and fall as the welding wire contacts the workpiece (known

as a short circuit).

More inductance increases the short circuit time and decreases the short circuit frequency rate. This causes

a wider and more penetrating arc, often with better edge wetting, useful for thicker weld joints.

Less inductance will create a narrow more focused arc. This effect can also be used to fine tune the arc to

produce less spatter. This is often effective on thin materials.

Wire speed, wire size and type, shielding gas will all change the effect that the inductance setting has on

the welding arc.

To adjust inductance, rotate the Inductance Knob.

Figure 5

Arc Force setting is adjustable from 0 – 100%. Sometimes called 'Dig' or 'Arc Control'. A Stick welder is

designed to produce constant output current (CC). This means with different types of electrode and arc

length; the welding voltage varies to keep the current constant. This can cause instability in some welding

conditions as Stick welding electrodes will have a minimum voltage they can operate with and still have a

stable arc.

Arc Force control boosts the welding power if its senses the welding voltage is getting too low. The higher

the arc force adjustment, the higher the minimum voltage that the power source will allow. This effect will

also cause the welding current to increase. 0 is Arc Force off, 100% is maximum Arc Force. This is practically

useful for electrode types that have a higher operating voltage requirement or joint types that require a

short arc length such as out of position welds.

Table of Contents

Weldforce 175mst