[GreenKeys] calibrating speed on a 14 and 15

[drlegendre .]

"yikes We  have a general radio stroboflash here somewhere......."

Beat me to it.. But yes, the veritable strobo-tach would seem to be yet
another excellent candidate.

On Sat, Sep 24, 2016 at 8:22 PM, <COURYHOUSE at aol.com> wrote:

> yikes We  have a general radio stroboflash here somewhere.......
>
> I feel really fortunate we were presented  with a new in wrapper tuning
> fork  got  87.6  so  good to go that way too....
>
> Ed#
>
> In a message dated 9/24/2016 6:20:06 P.M. US Mountain Standard Time,
> drlegendre at gmail.com writes:
>
> (And then the newb chimed in with..)
>
> Can't you use a common $25.00 optical (laser) tachometer? Do the simple
> laser tachs lack sufficient accuracy or resolution for the job? What about
> good old-fashioned strobe discs, illuminated by a neon + diode lamp?
>
> On Sat, Sep 24, 2016 at 6:48 PM, Howard Weeks <weeksh at att.net> wrote:
>
>> The tuning fork frequency is 87.6 vps. My memory is flakey at my age but
>> I believe the motor rotation speed was supposed to be 1800 RPM.
>>
>> When you watch the black and white blocks on the governor end of the
>> motor through the viewing slot on the fork, a motor that is running the
>> correct speed will have the blocks setting still - not drifting to the
>> right or left. I believe a strobe set to 87.6 flashes per second would
>> accomplish the same thing.
>>
>> Howard K5JCP
>>
>> On 9/24/2016 3:26 PM, Richard Knoppow wrote:
>>
>>>     Could not some other method than a tuning fork be used?  I am not at
>>> all familiar with the calibration procedure but it seems to me that an
>>> audio oscillator and counter could be used, or if its visual could be
>>> used to trigger a stroboscope.  This is providing the correct frequency
>>> is known which I suppose it is.
>>>
>>> On 9/24/2016 2:34 AM, simon wrote:
>>>
>>>> Hi all,
>>>>
>>>> as I have two machines that are in need of speed calibration and lack
>>>> the tuning fork but have a abundant amount of Arduino's, oscilloscopes
>>>> and frequency generators at my disposal, what rpm are the motors
>>>> supposed to run on. Of course these are the governed motors with the
>>>> speed changing wheel in the external interrupter part.
>>>>
>>>> there are white and black blocks on the outside.
>>>>
>>>> I remeber reading about a electronic speed control someone build, but I
>>>> am unable to locate the info.
>>>>
>>>> Besides that, I am working on a ESP8266 to heavy metal box, so that our
>>>> beloved machines can connect to Wifi and do all kinds of stuff. the
>>>> Software Library used just passed sending serial 50 baud tests. Now I am
>>>> working on receiving part. Then finally do the internet part, but as
>>>> that part is already done by someone else, i merely need to wite the
>>>> right calls to the library for that. Then I will be able to attach the
>>>> machine to IRC , twitter, whatsapp (if available) and maybe itelex.
>>>>
>>>> but first the speed issue...
>>>>
>>>
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>
>
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