I was interested in looking at the waveforms my generators make compared to mains so I bought one of those cheaper DSO oscilloscopes. Yes I know they are not amazing wonderful machines, but even the more basic ones are better then none.
Generator is a US made 60Hz welder/generator unit from the Miller brand. Dates back a dozen years or so. Capacitor regulated.
Have attached an image of the waveform under no load. This cheap scope does not show the bottom waveform correctly.
I have also attached an image of the waveform when a cheap inverter welder is connected and working.