I agree with you. I think it can be done with hand tools with careful
measuring and marking. I have access to a small milling machine that I
think can handle it. My major barrier to a Tesla Coil is the tank
capacitor. I really want to make a flat plate cap and have done some
research and testing on materials. I know it can be done but apparently
longevity is the problem. Am looking at 10 layers of 0.006 thick
polyethylene. If you figure about 1kv per mill that should be good for
60kv. Using a 10kva. 14kv pole transformer. All immersed in oil.
Teddy
On Tue, Feb 16, 2021, 11:20 AM Steve White <steve.white1@xxxxxxxxx> wrote:
> Its pretty surprising what can be done with hand tools such as a file if
> you are slow and deliberate. Since the balance is critical, especially with
> the 3600 RPM motor, that's why I suggest a milling machine to get the
> accuracy of depth and position. If a milling machine is not available,
> another possibility is to use a vertical belt sander with a coarse grit
> sanding belt.
>
> Steve White
> Cedar Rapids, Iowa
>
> ----- Original Message -----
> From: "Lux, Jim" <jim@xxxxxxxxxxxxx>
> To: tesla@xxxxxxxxxx
> Sent: Tuesday, February 16, 2021 9:49:15 AM
> Subject: Re: [TCML] sync motor
>
> On 2/16/21 7:37 AM, Tedd Dillard wrote:
> > Thank you Steve I also have that information and am planning on building
> > one that way. I was looking for feedback on performance as I have also
> > heard about difficulties. I am glad to hear from someone that has actual
> > satisfactory experience with the design.
> > Thanks
> > Teddy
> >
> > On Tue, Feb 16, 2021, 10:27 AM Steve White <steve.white1@xxxxxxxxx>
> wrote:
> >
> >> I have a synchronous motor made that way and it works great. It has two
> >> flats machined 180 degrees apart. You really need a milling machine to
> cut
> >> the flats. My motor started as a standard 1/2 HP 3550 RPM induction
> motor.
> >> For a 1750 RPM induction motor as a starting point you need to cut 4
> flats
> >> spaced 90 degrees apart. There are some guidelines buried in the
> archives
> >> about how deep and where to make the cuts. I actually have some PDF and
> JPG
> >> files of the guidelines but since we can't attach files I can't post
> them
> >> on this board. I didn't create these files. These are files that I have
> >> collected from various sources over the years. If you supply your E-Mail
> >> address I can send them to you.
> >>
> >> Steve White
> >> Cedar Rapids, Iowa
>
>
> There was a LOT of discussion about this on the list, say, 10 years ago?
>
> There are some folks who actually did the flats *by hand* with a file,
> and it worked.
>
>
> googling "site:pupman.com flats sync" turns up some hits..
>
> https://pupman.com/listarchives/2005/Apr/msg00793.html
>
> https://www.pupman.com/listarchives/2000/November/msg00356.html
>
> https://pupman.com/listarchives/2001/July/msg00168.html
>
> https://www.pupman.com/listarchives/2002/February/msg00621.html
>
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