How do I control weld spot size and weld depth?
The simplified answer: Your weld power adjusts your spot size while your weld time controls penetration. In reality both of these factors (power and time) influence both welding characteristics (spot size and weld depth). However, the above rule-of-thumb will allow good and intuitive control of your welding parameters. It is also important to keep your tungsten electrode sharp to maintain precise control over the characteristics of the weld spot size and weld depth.
