The speed change on the VFD is far handier than what most lathes, and many mills have. Just turn a knob, just like volume on an old radio.
Tool chattering? Just twist the knob to see if different speeds will stop it. Without a VFD you have to stop the cut, shift the gears, start it up again and see what happens.
Static phase converters are pretty much obsolete with the availability of low cost VFDs and inverters. I honestly can't think of one benefit to using one over a VFD. I tossed the phase converters for my mill and lathe over 5 years ago.
I tossed the single phase motor on my bandsaw and replaced it with a 3 phase motor and VFD. No more changing the belt to go from cutting soft to hard materials. Instead of having just 4 speed choices I have totally variable speed control.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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