Why do we have an unstable arc in TIG welding?

Why do we have an unstable arc in TIG welding?

Most likely, it's the sharpening of our Tungsten electrode that's the cause:

When it comes to the correct sharpening of your electrode, the next question often is what does proper tungsten electrode sharpening look like?

The critical thing to know is that sharpening influences weld penetration, arc stability and, above all, weld quality, in addition to the electrodes respective durability.

A correct sharpening is one that gives the Tungsten an ideal shape, preventing it from being too pointed but not blunt. When using a Tungsten grinder and cutter, it is important to know that when using it you have to grind the tungsten electrode parallel to the wheel:

Staying Protected While Sharpening Tungsten Electrodes

Knowing the importance and influence of the sharpening of the Tungstens in TIG welding, you might wonder how to achieve the ideal sharpening? At this point, we must talk about health and the welder's breathing zone.

Sharpening involves the release of harmful particles for welders and hence the importance of knowing where and how to do it.

During the process of sharpening, a variable amount of particles is produced that can penetrate small wounds and, above all, be inhaled through the lungs and the digestive system where they disintegrate and accumulate.

Studies on tungsten as a carcinogen have produced mixed results to date, but recent studies have shown exposure to tungsten concentration can lead to issues of the immune system. The greatest risk is the inhalation of the dust, the product of the sharpening, which is why it is important to use a sharpening system with a "closed process" that keeps the electrode covered at all times and protects the welder or laborer from overexposure.

Tungsten sharpeners exist that make this key task simple, accurate and safer.

A  tungsten grinder is a portable piece of equipment that is easy to operate and helps in the repetitiveness of the sharpening.

Ideally but not always,  electrode sharpeners will feature a "closed process" that limits exposure of tungsten particulates and sharpening powder to the operator. There are dry grinders that use powder where the operator will be exposed to it, and that can over time be potentially hazardous.

Always use proper localized ventilation or respiratory devices when using tungsten grinding machine.