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.5hp-1hp 220v 1ph to 3ph VFD suggestions?

C

calgaryguy

Chris
While I'd love a TECO, my piggybank is broke after I bought a 9" SM Utilathe, so I need a recommendation for a .5 to 1hp 220v 1ph to 3ph VFD to run my new toy on.

Tons of options on Amazon, but I wouldnt mind hearing from someone with a good experience with a specific model.
 
I've got one of these on the shelf:


.75 HP baldor TEFC single phase. Right shaft size I think and is just a little bigger than the 1/3hp 3ph thats in the lathe now.

Im worried that a 3/4hp motor is too big for this little lathe however.
 
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I guess thats a win?

I'll need to figure out the reversible wiring of course. ;).

EDIT; and figure out the threaded backplate 'clamping' so I can use it in reverse!
 
calgaryguy said:
I guess thats a win?

I'll need to figure out the reversible wiring of course. ;).

EDIT; and figure out the threaded backplate 'clamping' so I can use it in reverse!
Click to expand...

Not sure I'd go that route. If the stand controls are all wired up for 3 PH, I think I'd just stick a VFD on it and not putz with re-engineer the wiring. Does the stand have a FWD/REV control on it?
 
The sheet metal base has a on/off switch and a reverser handle switch

IMG-2326.JPG
 
I have the same style that dppittman has, the beige 2.2kw one, hasn't exploded yet, lots of settings a guy can tweek, you can get them for right around 100$ if you keep an eye out

Reverse wiring is a cinch with a VFD, just 3 low voltage wires to the vfd and the switch you already have (one back, one forward and a +5v) a quick setting change and it's done
 
phaxtris said:
Reverse wiring is a cinch with a VFD, just 3 low voltage wires to the vfd and the switch you already have (one back, one forward and a +5v) a quick setting change and it's done
Click to expand...

His lathe already has a 3 PH motor wired with FWD/REV in the stand all's he needs is 220V 1 PH to 3 PH conversion.
 
Nice score on the lathe Chris!

For sure use the panel mounted controls as low voltage inputs to the VFD. The motor needs to be connected directly to the VFD motor output - without any electronics in between. The VFD needs to see what the motor is doing - both for control and protection.
 
When adding a vfd to the machine, the line voltage goes directly to the VFD, the outputs of the VFD go directly to the motor, and as Rudy says, the machine controls tell the VFD what to do
 
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