RE: Summing up of Async Vs. Sync

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>

Hi, Garry,

You may want to see the offical method and my hand grinding notes at:

http://hot-streamer-dot-com/TeslaCoils/Misc/syncmot.zip
http://hot-streamer-dot-com/TeslaCoils/Misc/sync_motor.txt

A good grinder or even a file could do it.

Cheers,

	Terry

At 02:19 PM 6/22/2001 -0700, you wrote:
>Hmm, does this mean that the flat's aren't that critical, that I could use a
>hand grinder to make flats as long as I don't take off so little that it
>doesn't grip, or take off too much so that the motor can't rotate the disk
>without losing sync?
>
>I never even considered a Sync gap because I figured it would take a machine
>shop to do it right and right now, the car is eating hundreds of dollars out
>of my bank, but I can afford to get an ole $20 used motor and grind it
>myself with a dremel.
>
>-----Original Message-----
>From: Tesla list [mailto:tesla-at-pupman-dot-com]
>Sent: Friday, June 22, 2001 10:22 AM
>To: tesla-at-pupman-dot-com
>Subject: Re: Summing up of Async Vs. Sync
>
>
>Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
><FutureT-at-aol-dot-com>
>
>In a message dated 6/22/01 10:01:08 AM Eastern Daylight Time,
>tesla-at-pupman-dot-com writes:
>
>>
>>  How does grinding flats on the shaft or rotor thing make it sync?
>>
>>  Seriously out of tune,
>>  Matt Shayka
>
>Matt,
>
>Without flats, the rotating magnetic field cannot "grip" a
>particular point on the armature, so the armature slips
>constantly.  This slipping permits the motor to draw more
>power and produce more power as the load is increased.
>When flats are ground, the magnetic field grips the
>un-ground area, so it locks to the field and doesn't slip
>anymore.  However, this arrangement limits the motor's
>torque.  If the motor is burdened with heavy a load, the
>motor will lose lock (lose sync), until the load is reduced,
>and the motor can lock up again.
>
>John
>
>
>
>