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Re: Grinding flats into motor to make syncronous help!



Original poster: striker754@xxxxxxxxxxxxx What are these electronic gaps you speak of? How expensive? How do they work, etc?

I think I got the motor sync'd. Put a white mark on it and it shows up in 4 places under a 60hz light. Spots dont change.

----- Original Message -----
From: "Tesla list" <tesla@xxxxxxxxxx>
To: <tesla@xxxxxxxxxx>
Sent: Sunday, May 28, 2006 7:45 PM
Subject: Re: Grinding flats into motor to make syncronous help!


> Original poster: "Mike" <mike.marcum@xxxxxxxxxxxx>
>
> If all else fails get a synch motor to begin with. I have a few I'm
> thinking of putting up on ebay now that electronic gaps are almost
> idiot proof, tho a SISG would be difficult to make sound like a 120
> bps circular saw.
>
> Mike
> ----- Original Message ----- From: "Tesla list" <tesla@xxxxxxxxxx>
> To: <tesla@xxxxxxxxxx>
> Cc: <striker754@xxxxxxxxxxxxx>
> Sent: Sunday, May 28, 2006 7:18 PM
> Subject: Re: Grinding flats into motor to make syncronous help!
>
>
>>Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>
>>
>>Hi Aaron,
>>
>>There are three options (I did not make the ZIP file...) It was the
>>guy in CA but his name escapes me at the moment...  He has been on
>>Ripley's a few times with Danielle Stampe...  Blame him :o)))
>>
>>1. Cut them like picture motors_2.gif.
>>
>>http://hot-streamer.com/temp/motors_2.gif
>>
>>2. Cut them like picture salnt_3t.jpg.
>>
>>http://hot-streamer.com/temp/salnt_3t.jpg
>>
>>3. Or, just cut them 0.75 inches wide ;-)
>>
>>The first two do not match, and they should....  But if salnt_3t.jpg
>>had followed the directions in motors_2.gif they would have been way
>>too small....
>>
>>I think John Freau has shown it is just not real critical...  The
>>more you cut the higher the torque but the hotter the motor gets...
>>
>>"I think" 0.75 inches would be fine.  However, many on this list
>>like Dr. R, Bill Wysock, John Freau...  Would know far more than
>>me...  All my gaps are electronic now ;-))  If you mess up, you can
>>use one of my old sync gaps ;-)))  But I think 0.75 wide to like an
>>inch wide would work fine. You can always cut more but it is hard to
>>put metal back on...  The more you cut the hotter they get and the
>>more current they draw which can be a pain...
>>
>>Your dimension "d" in the picture is probably just fine too...  I
>>don't think anyone has ever made a sync motor, no matter how much
>>they cut, that did "not" work...  I like less, to cut down on motor
>>heating, work, and lower current draw...  It does on take much to
>>spin a rotor...
>>
>>Cheers,
>>
>>         Terry
>>
>>
>>At 03:07 PM 5/28/2006, you wrote:
>>>Terry,
>>>
>>>I did some measurements, using the rotor diameter to flat size.
>>>Your ratio is about 3.8 with a 3.22 diameter rotor, and .85 flat
>>>size. My rotor is about 3.5 inch diameter. With a 3.8 ratio, that
>>>works out to 0.92 inch wide flat.
>>>
>>>0.944" is the distance from outside to outside on those poles where
>>>the blue d is marked. http://theflyingbullet.com/motor/IMG_1769.JPG
>>>Basically the outside to outside distance of 3 of those poles.
>>>
>>>Center to center distance over 3 of those poles is about 0.7" or so.
>>>
>>>Should I do the 0.92" flats?
>>>
>>>Original poster: Vardan <vardan01@xxxxxxxxxxxxxxxxxxxxxxx>
>>>
>>>Hi Aron,
>>>
>>>See the notes here too:
>>>
>>>http://hot-streamer.com/TeslaCoils/Misc/sync_motor.txt
>>>
>>>Cheers,
>>>
>>>          Terry
>>>
>>>
>>>At 12:55 PM 5/28/2006, you wrote:
>>> >I'm trying to convert this motor to syncronous operation. I am not
>>> >sure how big to cut the flats. Picture 3 in terrys zip file shows
>>> >the flat going to the edge of the next pole. Yet the motors 2
>>> >picture in the same zip file says measure to the middle of the next
>>> >pole. What should I do?
>>> >
>>> >Here is a picture of the motor:
>>> >
>>> >http://theflyingbullet.com/motor/IMG_1769.JPG
>>> >
>>> >Is the black area the dead pole? The red ones dont have direct run
>>> >windings around them, but they are totally encased in the windings,
>>> >which is what I think matters correct? The black one is inbetween
>>> >the 2 loops of windings which is what I think I want...
>>> >
>>> >Is that the correct distance for the flat to be cut? Half way
>>> >between the next active pole? The armature is ~ 3.5 in diameter.
>>> >
>>> >Thanks guys
>>> >
>>> >Aaron
>>> >
>>> >PS: Terry, can you email me your phone number, maybe we can get
>>> >together sometime again.
>>
>>
>
>
>
>