The black square looks like garolite and will be fairy hard to turn into a
circle.
If you're bold, cut the edges off into an octagon shape with a saw and
then take an angle grinder with a flap disk to it to rough in the circle
shape you've scribed onto the material. Then fire up the motor like a
lathe and take a finishing pass. The mess will be incredible, and
abrasive. Unless you have spare eyes and fingers, the full face shield,
some sort of mask and hearing protection are not overkill for angle
grinder use.
The motor looks old, but fine power wise if it's 1/5th HP.
That's a nice looking secondary there.
On Sat, 11 Dec 2021, Tesla Burton wrote:
> Sorry I have image links of what I?m intending on using.
>
> https://ibb.co/PjQgSG3
>
> https://ibb.co/CH687B1
>
> https://ibb.co/VVytFYw
>
>
> Vin
>
>> On Dec 11, 2021, at 1:32 PM, pupman.com@xxxxxxxxxxxxxxxxxxx wrote:
>>
>> There's no need for tungsten carbide. A plastic disk made of HDPE or even a thin plastic cutting board is fine. You might even sneak by with the rotor disk being press fit to the shaft, depending your skills with a drill. balance of the disk really won't matter too much at 1800RPM or whatever you use.
>>
>> I like brass contacts from bolts of allthread, because it's easy to work with and isn't covered in zinc. I made my first coils with no machine tools past a drill and handsaw and that works fine. Without additional information on the motor, there's not much more I can suggest.
>>
>> Mechanically all you need are to support the contacts and to insulate them. No parts touch, they just fly by each other. It's really not an engineering challenge. You will need the motor to rotate in a cradle of some sort to "time" it against line voltages. My last rotary gap used strings to tie the motor to the base. Phase was adjusted by rotating the motor by hand. It worked fine.
>>
>> Photos of the motor and setup would help.
>>
>>
>>> On Sat, 11 Dec 2021, Tesla Burton wrote:
>>>
>>>
>>> Hi all I have a small bodine synchronous motor and I?ve been looking for a small rotor for it. It?s a 1/4 shaft. I?ve seen tungsten carbide crisscross electrodes insulated by nylon or some sort of non conductive plastic but I have no info on where or how to make such a rotor and point assembly. Alternative I could use a small disc type rotor but the ac motor has barely any hp or torque. I?m somewhat of a novice but my current coil uses an RQSG and two 12k / 30ma neons in parallel.
>>>
>>> Thanks for your time
>>>
>>> VInnie
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>