I have just upgraded my 4 speed lathe to variable speed. If anyone is interested the details of how I did it are at
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If anyone wants any more info please email me.Variable speed upgrade
Sep 18, 2004
2 Replies
Nice work, Colin. What size is the enclosure on the wall? The reason I ask is because I put my VFD external, but it gathers dust. I'm considering putting it inside an enclosure, but I'm worried about overheating. See:
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a cutoff switch will be a good idea. Did you also run a separateground line, too?
I programmed my Hitachi for 'soft start' and 'soft stop'. And, I added the 'jog' feature and reverse. To each their own. I wish VFDs came with remote displays that could be programmed to show the spindle rpm! Dan
Dan I recently converted my Lathe to Variable Speed via an Inverter and I noticed from the Manual that my particular Inverter needed to be in Free Air but also in a Dust Free Area as well.
I overcame this by putting it in an Enclosure mounted on the Wall of my Workshop and Ventilated it with a Small Cubicle Ventilation Fan drawing clean air from the Outside and not from the Workshop.
Details can be found on my Web Site at
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in thehints and tips section.Richard
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