I'm consolidating three welders onto one cart; a DialArc 250 on bottom followed by a Syncrowave 180 SD topped with a MM 135.

I'm merely stacking one welder on top of the other, i.e., no separating shelves / platforms.

As I would never be welding with any of these units at the same time, it seems logically permissible to wire the Syncrowave to the DialArc's lugs in parallel fashion and thereby need to only run one cable to the wall panel.

The DialArc has a 120 volt circuit split out so the MM 135 could be plugged in there.

Again, I don't profess to know much about electricity.

Is it sensible to do what I describe?

Also, would this cause and high frequency problems?