Re: [CAD_CAM_EDM_DRO] sorting these motors out

Take a look at www.stepperstuff.com.

D.

----- Original Message -----
From: "Roy J. Tellason" <rtellason@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Saturday, January 31, 2004 1:44 PM
Subject: [CAD_CAM_EDM_DRO] sorting these motors out


> I see lots of posts in the various CNC-oriented groups about people with
some
> pretty heavy-duty setups spending some really astounding amounts of money
on
> stuff... Not me! I'm a scrounger, been that way since way back when.
>
> Anyhow, I've got an assortment of motors here and am wondering what might
be
> useful in terms of the machine I hope to build somewhere not too far off.
> This is gonna be a small one (I'm still in a second floor apartment) and
will
> probably see most use for milling/drilling circuit boards.
>
> These motors came out of old floppy drives, printers, and similar stuff.
> Some are fairly plainly marked as to what they are, winding resistance,
> current, etc. while others aren't. Is there some easy way to track down
> specs on some of these that are only marked with model numbers? Many are
> Japanese makes, for whatever that's worth. Or is there stuff out there
on
> the web that would make this chore easier?
>
> I see fairly common references to specific motor sizes in terms of a NEMA
> number, but have yet been able to nail that down to anything in
particular
> regarding size. My one attempt at the NEMA web site wasn't all that
> successful. Is that info out there anywhere else?
>
> I have some motors here that were for floppy spindles, one direct drive
(I
> don't usually salvage those too often) but most were belt-driven, don't
know
> what I'm going to do with those as the RPMs would probably be on the low
side
> for much of anything useful. I also have several that were pulled out of
> 3.5" floppies, and these are equipped with screw-type shafts and are
> apparently okay for only a limited travel. Suggestions as to what to do
with
> these would be welcomed as well.
>
> My thinking is that the least ones that are probably going to be useful
are
> the ones that came out of 5.25" drives, either the roughly cubical ones
or
> the "pancake" style ones, which were both used the same way with a
band-type
> head positioner and probably have roughly comparable torque.
>
> Then there are some others here, that I'm not all that sure about. I
*think*
> these came out of old daisywheel printers, and they don't look like
> steppers, but in many cases appear to be equipped with optical
interrupters
> at the back end of the shaft, in one case under a plastic cover (labeled
> "Warner" and "Rated 1 AMP" and "Resistance/phase 20 ohms" but not much
else)
> or there's a small circuit board on the back end of the motor with a
separate
> cable coming off it than the one that provides the motor drive power and
an
> optical interrupter disc is visible attached to the motor shaft. A couple
of
> these are pretty substantial compared to the rest of the pile, maybe 2,
> 2-1/2 inches in diameter and 3-1/2 - 4 inches in overall length. Most of
the
> rest of this stuff is significantly smaller.
>
> Any help on finding any useful info on these, or suggestions as to what
some
> of them (the drive spindle moters in particilar) might be used for would
be
> appreciated.
>
>
>
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