Adding Digital Generators to an Old Analogue TIG Welder

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Below is a default wave form of Alternative Current welding, aluminium for example, showing the minus peak as 45A besides overshoot.
Output power is set to 50A for welding;

This shows the real welding power is a tad lower than the setting value.

Here is another wave form attained with the same setting but the output power was set to 30A;