Pulse Welding with Foot Pedal

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How to set up and use the TIG foot pedal

One of the biggest benefits of having a foot pedal and control amplifier is that you can pulse weld manually. If you do not have a TIG machine with the pulse option, do it yourself.

Press and release, press and release at a steady rate and you are pulse welding. By laying it down, you can reach the peak amplifier. Then, by backing off, you lower to the base amplifier.

However, it does take some practice to get the timing and pressure consistent. Being able to pulse is useful if you are welding very thin metal, and you can adjust your pulse with the foot pedal.

 

Limitations of the foot pedal

If you do not have a machine capable of high frequency TIG, you cannot use a foot pedal. If you have a multi-process machine that can do TIG, but it only lifts arc TIG (like all UNIMIG multi-process machines), you cannot use a foot pedal.

You can't use foot pedals because they act similar to the buttons on a high-frequency flashlight - press them once and the arc will automatically ignite.

With a lifting arc TIG, you are using a valve torch, where the valve is used to start the airflow and manually ignite the arc by bringing the electrode into contact with the metal. You cannot use the foot pedal to trigger the gas stream, so it cannot be used with a lifting arc TIG. There is no way to start the shielding gas and protect the weld.

The foot pedal is perfect for providing the welder with control of each weld. Just make sure you have a machine that can support it.

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