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Re: Small Rotary
Tesla List wrote:
>
> >From rwstephens-at-ptbo.igs-dot-netTue Oct 22 21:44:41 1996
> Date: Tue, 22 Oct 1996 22:04:38 -0500
> From: "Robert W. Stephens" <rwstephens-at-ptbo.igs-dot-net>
> To: tesla-at-pupman-dot-com
> Subject: Re: Small Rotary
>
> >>From SSNSanders-at-aol-dot-comMon Oct 21 21:39:03 1996
> >Date: Mon, 21 Oct 1996 10:10:15 -0400
> >From: SSNSanders-at-aol-dot-com
> >To: Tesla-at-pupman-dot-com
> >Subject: Small Rotary
>
> >Ive had an Idea:0 What about a hard drive disk for a rotary gap, maybe one
> >of the old 20 meg large diameter disks. The bearings in theese things are as
> >smooth as silk, they are balanced well. If it could be taken out and a motor
> >,say 1800RPM incorporated in the system, attach electrodes and balance, maybe
> >even belt drive it and run it in a horizontal position with 2 electrodes
> >stationary on either side making with the disk electrodes? What do you think?
> >anybody, If its feasible Im going to start on it. The comp. store has a bunch
> >of old large 20 meg drives for very old computers for about 20.00 each.
> > Stephen Sanders
>
> Stephen,
>
> I think you have discovered a well guarded secret! I have a pair of
> old hard drives I picked up from a surplus source with the intent of
> using them for a future rotary project where higher precision will be
> required. These disk pack drives are beautifully machined, on jewel
> like bearings as you say. Mine have a toothed timing belt to connect
> the spindle to a approx 1/2 HP motor. Memory tells me these things
> ran at 3600 RPM. There is a nice flat stainless steel platter about
> 5-6 inches diameter with threaded machined holes around the
> circumference which can be used to bolt your fiberglass or whatever
> wheel up against and have hiogher expectations of it running true
> without lateral wobble. I would certainly recommend these dinosaurs
> of computer technology as a great starting source of hardware for a
> rotary gap project! Your price of $20 is excellent value.
>
> rwstephens
Gee, I have 5 or 6 of those old beasts that I would be happy to get rid
of for $15 apiece plus postage. Let me know if anyone is interested.
Phil Gantt
pgantt-at-ix-dot-netcom-dot-com