[GreenKeys] Motor 310140

[Bruce Gentry]

A 2 pole synchronous motor will turn at 3000 RPM on 50 cycles, the motor 
you have would probably run at about 2900, varying with load. The motor 
would work fine in any sort of local only application as long as every 
device is driven from that one motor at the same "wrong" speed. You 
could put it into an ASR and it would work fine to punch and read tapes 
as well as print them out or for typing.

     Bruce Gentry, KA2IVY

On 8/1/21 19:15, Jim Cooper wrote:
> Thanks Bruce ...  I kinda wondered when I saw that
> 3450 rpm stamped on the case (there is a different
> speed/amperage stamped for 50Hz).
>
> That opens the question of what type of Teletype
> equipment would not require a motor with speed
> accuracy?   A local perforator?  I would think nothing
> that had to synch up with the baud rate ...
>
> On 1 Aug 2021 at 17:47, Bruce Gentry via GreenKeys wrote:
>
>> This is not a synchronous motor. If
>> it were, it would be 3600 RPM at 60
>> cycles. It's a regular induction
>> motor for applications where speed
>> accuracy is not important. It will
>> run a bit faster than 3450 when
>> unloaded or lightly loaded.
>>
>>       Bruce Gentry, KA2IVY
>>
>> On 8/1/21 16:28, Jim Cooper wrote:
>>> Does anyone know what unit the
>>> TTY 310140   FSN 6105 839 4608 synch motor
>>> was used on?
>>>
>>> I've looked in all the parts bulletins I can find
>>> and have not found it listed; it's similar to the
>>> LMU used in Model 28s but a bit 'lighter' duty
>>> apparently.    1/12th hp.  3450 rpm at 60 Hz.
>>>
>>> graphic
>>>
>>>
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