I had an ebay VFD. It was good for a couple of months and went up in smoke. Tried enclosing it in a tupperware container but kept overheating. I finally bit the bullet and got the KBAC with a 2hp motor. The control is great.
I know for a while this expense was off the table so I used a step pulley system. I was able to slow things down enough to avoid the bumps (still didnt switch to J weight belts yet). I also used a 1750 rpm motor. If I needed to hog things off I used an angle grinder.
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