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Variable RPM setup for your lathe or mill - $220 (Seattle)
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The Variable Frequency Drive (VFD) combined with a 3-phase AC motor would allow you to
regulate rotation speed of the spindle between 10 RPM and 10,000 RPM.
Buying those units on-line sounds attractive however an inexperienced buyer doesn't expect that
VFD also requires some wiring as well as programming in order to operate properly.
You have to set up a few dynamic parameters depending on your specific motor.
I am offering a brand new VFD for $220, plus my free advice regarding its integration
into your existing machine tool wiring diagram.
I got a few 3-phase motors to chose from, ranging from 1.5 HP to 5 HP
(a separate deal)