[GreenKeys] is my Model 15 motor shot?

[Bruce Gentry]

If it starts when you spin it by hand, the starting switch has probably 
failed or gotten dirty. You will need to remove the motor and dismantle 
it to examine the starting components. The flyweights and linkage or the 
ring that pushes on the starting switch may be stuck, the contacts 
really cruddy-usually from over oiling- or, in the worst case, the 
starting winding may be bad, but that is fairly unlikely.  The motor is 
a split-phase start, and when it comes up to speed, the hard steel shell 
of the rotor gets magnetized and the motor changes to synchronous 
operation.  It does the job well, but is fairly inefficient and  runs  
warmer than other motors.  Don't run it without the fan for more than a 
few minutes, it will get hot and the fan serves as a flywheel as well. 
Running the machine without the fan will cause a lot of needless wear on 
the  gears.

      Bruce Gentry

On 4/5/17 11:37 PM, moody1951 wrote:
> Yes. Refuses to start by itself. I have to give it a nudge.
>
>
>
> Sent via the Samsung GALAXY S®4, an AT&T 4G LTE smartphone
>
>
> -------- Original message --------
> From: Bruce Gentry <ka2ivy at verizon.net>
> Date: 04/05/2017 7:54 PM (GMT-06:00)
> To: greenkeys at mailman.qth.net
> Subject: Re: [GreenKeys] is my Model 15 motor shot?
>
> Three and a half ohms resistance through the motor doesn't sound 
> unreasonable. The governed motor is series wound, and has a low 
> resistance, the synchronous motor has both the start and run windings 
> in paralell when the motor is stopped. Which motor do you have? Is it 
> refusing to start?
>
>       Bruce Gentry, KA2IVY
>
> On 4/5/17 8:32 PM, Bruce Phillips wrote:
>> Hi,
>>
>> I suspect it's OK.....if the fuse did not blow, as you said earlier 
>> then it's unlikely it's shorted. Are you able to confirm it is an AC 
>> Synchronous Motor, or a AC Governed Motor?  My motor is a 50Hz, 110V 
>> motor (for Australia), so may be slightly different to the 60Hz 
>> version, but within ballpark....Depending on the multimeter, some are 
>> not great at measuring low resistance accurately. Did you measure the 
>> resistance at the motor terminal studs? If so you could check the 
>> remaining circuit by checking the continuity between the spring 
>> fingers that connect to the motor, and your power plug. I suspect 
>> that there is an issue with the motor control relay contacts......you 
>> should be able to work out where to check from the pic below.
>>
>>
>>
>>
>>
>> On 6/04/2017 8:54 AM, Reggie Moody wrote:
>>> Measured 3.7 ohms across model 15 motor windings. Seems low. Could 
>>> it be shorted?
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