OK - I'm in the states with 60 HZ. I'm using a little fluorescent shop
light. It appears to be the inner ring of dots that works for 60.
Here's the problem. The only time I can get the dots stationary, the
motor appears to be running at half speed. It'll sit still a while and
then they'll begin a slow creep, then they'll sit still again. I
thought the tach head was in the loop to provide feedback to the speed
control so that everything would remain constant under varying loads.
Would this not also keep the speed constant also if you're receiving
power fluctuations? I got my power supply back from Jerry Korb at the
beginning of May (I was lucky to have him take the project on before the
situation with his mother developed) and it's go brand new huge caps
that are beyond spec - so I doubt the problem is there. Should I look
at the tach head?
Bruce Daily wrote:
>
> Yep. Either an AC-driven fluorescent bulb, or AC-driven neon bulb
> would be ideal. The question is whether one set of dots is for 60 Hz,
> and the other set is for 50 Hz. I'll have to test it, I guess.
>
>
>
> -Bruce D.
>
>
>
>
>
> --- On ∗Thu, 6/26/08, lsf5275@aol.com /<lsf5275@aol.com>/∗ wrote:
>
> From: lsf5275@aol.com <lsf5275@aol.com>
> Subject: Re: [newmellotrongroup] tuning
> To: newmellotrongroup@yahoogroups.com
> Date: Thursday, June 26, 2008, 8:20 AM
>
> In a message dated 6/26/2008 7:04:10 A.M. Eastern Daylight Time,
> e4103s@yahoo. com writes:
>
> Yes, U.S. power (assuming you are in the the States) runs at
> 60 cycles, so if you shut out all the lights in the room and
> plug in a small lamp and shine it on the flywheel while you
> turn the tuning pot, it should line things up at 440. Keep in
> mind, incandescent strobing is pretty quick and the dots on
> the flywheel are pretty far apart so you may need to adjust
> your eyes to see it. Pretty brilliant of them to consider
> this, although with the CMC-10's that were in many of these
> things, I'm sure they needed all the help they could get until
> the SMS's were made.
> -Jack
>
>
> Any florescent light makes it easy.
>
> Frank
>
>
>
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