Used the drill press to make 3 of these. Put the square lexan in the chuck,
and c clamp the cutter to the side of the press. Work perfect and no
vibrations at 3600. I need your cool shop, lol
-----Original Message-----
From: Tesla [mailto:tesla-bounces@xxxxxxxxxx] On Behalf Of Steve White
Sent: February 16, 2021 11:00 AM
To: Tesla Coil Mailing List
Subject: Re: [TCML] sync motor
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.htmlhttps://www.pupman.com/listarchives/2000/November/msg00356.htmlhttps://pupman.com/listarchives/2001/July/msg00168.htmlhttps://www.pupman.com/listarchives/2002/February/msg00621.html
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