[GreenKeys] My spare motor for Model 15

[Larry Tighe]

I'm guessing that the fan is on the wrong end of that motor.  Isn't the 
longer shaft for the gear and the short end the fan?

On Ole' Sparkie, there is no start winding switch.  It's purely brushes to 
the armature and no mechanicals within.  Curiously, there are two screw 
heads...one on each brush cap....they're hot with 120 VAC....it must've been 
production number one LOL it's old....sits on the same base as the 15 motor.

lar
----- Original Message ----- 
From: "UEOGUY" <ueoguy at yahoo.com>
To: "Jim Haynes" <jhhaynes at earthlink.net>; "Derek Cohn/WB0TUA" 
<vibroplex at mindspring.com>
Cc: "Greenkeys ((E-mail))" <greenkeys at mailman.qth.net>
Sent: Saturday, June 07, 2008 16:59
Subject: Re: [GreenKeys] My spare motor for Model 15


>I agree, it's the same as my M15's motor, the only thing is that the fan 
>should be
> moved away from the motor and be flush with the shaft end.  Just make sure 
> you
> hold the motor to the table, as it will "jump" when power is supplied. 
> I'd use insulated
> gloves, or clamp it to your work bench, before testing.  The gloves are 
> just in case
> it has a winding short to the frame, and if your worried about stuff like 
> that, use a
> ground fault circuit to minimize damage to all involved!
>
> Good Luck!
>
> Just Bob!
>
> ----- Original Message ----
>> From: Jim Haynes <jhhaynes at earthlink.net>
>> To: Derek Cohn/WB0TUA <vibroplex at mindspring.com>
>> Cc: Greenkeys ((E-mail)) <greenkeys at mailman.qth.net>
>> Sent: Saturday, June 7, 2008 4:50:58 PM
>> Subject: Re: [GreenKeys] My spare motor for Model 15
>>
>> That is the correct motor, and it should be OK to plug it in momentarily.
>>
>> Now, that said, if it is sparking continuously there is something wrong,
>> as that motor does not have a commutator and brushes.  It says on the
>> name plate that it is a synchronous motor.
>>
>> What it has is a centrifugal switch that disconnects the starting winding
>> when the motor comes up to speed.  If that is sparking continuously,
>> failing to open cleanly, then it is in danger of burning up the motor.
>> So there is a need to open it up and clean and lube the centrifugal
>> switch.  After that it might make a burst of radio noise when first
>> started, but after that it should not spark nor cause any radio noise.
>>
>>
>>
>> _______________________________________________
>> GreenKeys mailing list
>> GreenKeys at mailman.qth.net
>> http://mailman.qth.net/mailman/listinfo/greenkeys
>
>
>
>
> _______________________________________________
> GreenKeys mailing list
> GreenKeys at mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/greenkeys