I know that this has been discussed to death on other forums, but why not discuss it to death here and keep the pageviews in-house? 😁
So, I'm kinda shopping used table saws and am faced with the ol' quandary - do I want to deal with a 3 phase machine?
Most people don't have 3 phase on tap and many resort to either Rotary Phase Converters or Variable Frequency Drives, both of which seem to have pros and cons.
RPCs typically have a bigger up-front cost, but can be used with multiple machines... but there are also matters of noise, energy efficiency and convenience (always flipping two switches instead of one).
VFDs can have a lower up-front cost and some nifty features like speed control and braking... but each machine needs a dedicated unit and they seem to be practically limited to ~3HP for most residences (because of single phase input limitations [I could be wrong here - I don't know what I'm talking about and the info online is a jumble] and the costs of units rated to support 5+ HP).
I guess that I'm curious to hear the thoughts of those that have done either/both. I also still have some questions on either approach and they're basically around sizing -
For RPCs, do you need an idler motor that's significantly lager than the motor that you want to run (some say 2x the HP)?
For VFDs, can a ~3HP VFD practically support a 5HP machine, in this case, a saw specifically?