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https://yeswelder.com/blogs/yeswelder/how-pulsed-welding-works

Pulse Frequency

Pulse frequency is one of the first settings you will encounter when setting up your welder. It represents the number of pulses per second, expressed in Hertz (Hz). For example, setting the pulse value to 1 Hz means you will get one pulse from peak to background current in one second.

The frequency values in modern welders range from 0.5-200 Hz, but industrial-grade machines can even achieve 500 pulses per second when needed. The frequency can significantly impact the results and appearance of the weld, so it is crucial to set it right.

• Low pulse settings of 0.5-1 Hz produce an outstanding weld appearance, and it is often used when looking for that stacked dimes weld. You dab the filler metal during the peak current, remove the rod and advance the torch during the background period. You can use it to practice TIG welding rhythm and repair uneven TIG weld beads.
• A 2-10 Hz soft arc setting, is excellent when you need a broad weld puddle. However, it results in a lower penetrating weld, which is most suitable when welding outside corner joint or cap pass in multi-pass welding.
• A 10-30 Hz will produce strobe arc light, which many find unpleasing to look at. Even though you can experiment with it, this frequency can be highly disorienting.
• The default range of 100 Hz is a great starting point for any beginner. If you are new to pulse welding, we recommend starting at 100 pulses per second, then experimenting with lower or higher values.
• Over 100 Hz, you get a stiffer arc that is completely opposite to a soft arc. The weld bead is narrow, but you get deep penetration, better arc control, and faster welding speed which is essential when welding thicker metals.