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Old 10-28-2020, 10:35 AM
cliffrod cliffrod is offline
MetalShaper of the Month January 2020, March 2022
 
Join Date: Dec 2014
Location: Spartanburg, SC
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Quote:
Originally Posted by Overkill View Post
. VFD's - you'll need one per machine..

Quote:
Originally Posted by mr.c View Post
There is no need to have a vfd for each machine. The only precaution with the vfd is that I taped over my control switch at the machine. Cutting off the load on a running vfd is supposed to do bad things to the vfd.

Quote:
Originally Posted by metal manny View Post
As others have mentioned, I too run a VFD around my workshop and run multiple machines off one drive (220V single in, 220V 3-phase out). I also use the original on-off switches situated on my two Pullmax's to operate the machines...
This ^^^ is the reason I'm asking for advice and still studying the solution. I have no reason to doubt or mistrust any of you. It's just the opposite. I value your opinions greatly and know that I can trust your experience & advice. No matter, I am more familiar with the likelihood of me choosing the one combination that will guarantee unwanted issues in the future.

Comparable differences have been found while studying the assembling of a rotary phase converter for the past year+, from the "all you need is a rope to start the spare 3ph motor for the third leg- i did it like that for years" to fine tuning the generated leg voltage and maintaining idler motor rpm with proper capacitors to protect the machines' motors and stabilize operation.

The input is much appreciated. I'll keep studying. Maybe this thread can help others as well.

Edit- I realize that this is China unit, but is something like this what I would use to use a single vfd to provide a 3ph circuit in my shop? https://www.ebay.com/itm/UPDATED-7-5...&ul_noapp=true? I can see a more modern lathe at some point, possibly in the 3hp range. A vfd to vary speed on my Gairu is the biggest benefit I see, but if it's going to be across the shop & back and forth to use it, that seems nuts. The current lathe and mill will probably be fine with a simple rotary converter.
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Last edited by cliffrod; 10-28-2020 at 10:58 AM. Reason: See edit
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