[GreenKeys] Help with a motor

[Bruce Gentry]

On 4/1/20 8:46 PM, Bruce Gentry wrote:
>
> Check to see that the starting relay is dropping after the motor comes 
> up to speed. The condenser is not likely the problem becasue it is 
> only in circuit during the start. Arrange a safe way to disconnect the 
> start winding manually after the motor has started and see if the 
> noise disappears. Also, I did not see a fan on the motor. Is there a 
> stub shaft at the end away from the gears?  The fan is important to 
> give flywheel action when a synchronous motor is used.  The 
> instantanious speed of the type of motor you have  is constantly 
> varying and will cause gearing to make aweful sounds.  Think of a race 
> car going around an oval track, crossing the finish line at precisely  
> the same time each lap, but going 150 in the straighaways and 90 in 
> the corners. The inertia of the fan helps smooth out the variations 
> and reduces slack action and stress on the gearing.
>
>          Bruce Gentry, KA2IVY
>
>
>
>
>
>
> On 4/1/20 1:23 PM, til128 at juno.com wrote:
>> Hi gang:
>>
>> I am having some difficulty with a Miniature motor (161984). I am pretty sure it is electrical, but what do I know. :-)
>>
>> When turned on and running it makes a loud noise and a lot of vibration.
>>
>> When turned off, the noise stops and it silently coasts to a stop.
>>
>> If it IS electrical the only problem I see is either the cap or the relay.
>>
>> Would anyone have an answer to this?
>>
>> I am going try to attach a short video to this message - hope it works.
>>
>> Thanks in advance for any help.
>>
>> Tom
>>
>>
>>
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