[TCML] Variable RSG

[bartb <bartb@xxxxxxxxxxxxxxxx>]

Hi Scott,

I meant to reply to your thoughts about Grainger, but deleted the email 
and emptied trash. So writing this under and new subject.

Anyway, yes Grainger does have some decent prices. But, for AC speed 
control, price is HP dependent (even at Grainger). If motor is under 
1/4HP, you can pick up a speed control for $34. But for something like a 
1HP motor, you head to the $170 range minimum. I use a 2HP Baldor 
myself. This of course gets even more expensive for speed control. Even 
at 1HP, your already at VFD prices. The motors themselves are cheap and 
3-phase is likely the least expensive. For DC motors, the price can get 
very high in the 1HP range. This is where eBay comes in real handy.

Adam and myself are using a VFD to control a 3-phase motor and vary 
speed with a simple potentiometer. My Altivar31 2HP VFD is expensive at 
$300 each off the shelf. No matter how you slice it, as HP is increased, 
variable speed will cost a bundle between the motor + controller if 
purchased as new (even at Grainger). I think eBay is still probably the 
best way to beat these enormous prices.

BTW, I should let everyone know I have a brand new (in box complete with 
375 page manual) ABB 3HP VFD for sale which list in the $500 range. I'm 
letting it go for $200. P/N is ACS350-01E-09A8-2, 1-phase 200 to 240, 
21A and 3-phase 230V out, 9.8A, 0 to 500 Hz variable frequency. I 
haven't used it and I don't know any of the details. Should not be too 
difficult to figure out.

I also have a used 2HP SquareD Altivar 31 VFD for sale for $125. Works 
perfect! Don't have the p/n handy, but it's 1-phase 200-240 in and 
3-phase 230V out with 0 to 500 Hz variable frequency.

If anyone wants these, they should contact me at bartb@xxxxxxxxxxxxxxxxx 
I will also offer a money back guarantee that these VFD's are "both" in 
new working order. In order to use these VFDs, it is necessary to pick 
up a 2HP or 3PH 3-phase motor for them (as appropriate to the VFD HP 
rating). Check eBay. Sometimes these motors can be found for around $50. 
I have only one spare 1HP 3-phase motor on hand, but it doesn't match 
these particular VFD's. However, if you come across a VFD or speed 
controller requiring a 1HP, 3-phase motor, I will sell it to you for $50.

BTW, for those that don't know, Leeson (major motor manufacturer) just 
announced  that they are off to Mexico to build their motors! Cheaper 
labor I guess.

Take care,
Bart
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