[pianotech] newman planer, powermatic bandsaw

[Greg Newell]

Bob,

                I too was tired of having to coddle my machinery along, as you put it. The straw that broke my back was running long oak boards that were 4-6” wide through my Delta 12 ½” planer and having them bog down and gouge the wood. I tried the same thing with my Delta drum sander and a heavy grit paper with roughly the same results. The Yates American I bought for $1,000 doesn’t care what I throw in there it chews it up and spits it out the other end in record time. Kind of scary actually. 

                I never “did the math” and really don’t much care to. I have only a rudimentary understanding of electricity. That’s why I had a friend wire it up for me.  I’m aware of how these machines should perform and what it takes to slow them down and have never heard them so much as hiccup with any kind of wood in any dimension. That’s enough for me. If I am, truly, getting a 1/3 reduction in power with resulting heat buildup and motor wear I surely can’t tell.  YMMV. J

 

Greg Newell

Greg's Piano Forté

www.gregspianoforte.com

216-226-3791 (office)

216-470-8634 (mobile)

 

From: pianotech-bounces at ptg.org [mailto:pianotech-bounces at ptg.org] On Behalf Of BobDavis88 at aol.com
Sent: Sunday, April 12, 2009 4:33 PM
To: pianotech at ptg.org
Subject: Re: [pianotech] newman planer, powermatic bandsaw

 

Greg,

 

The Phase-Perfect Digital Power Converter does look great (better than the static or rotary). They claim 97% efficiency. I'd love to have great efficiency, and not have to even consider heat management. I can do an awful lot with the medium-weight power tools I have, but I'm tired of having to coddle my machinery at all, thus the desire for bigger, heavier stuff. However, a 10 hp digital converter is close to $3,000, which would gobble up one of the $reasons for using 3-phase equipment. Your solution might be the best for a small shop.

 

According to what I read (by no means claiming to be an expert here), the static converters start a 3-phase motor by applying 240v power to two of the three legs, plus power from a capacitor to the third leg; then run it on two legs, thus the loss. How are you figuring the loss in your system?

 

Bob 

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