[Coco] FD-502 replacement drives

camillus gmail camillus.b.58 at gmail.com
Mon Dec 18 17:44:10 EST 2017

Hi Gene,

Are you looking for the 5.25 drives, or the smaller 3.00 inch drives?

I have two of the 5.25 drives and to be honest can't use them because I do not have any floppies anymore...

If you send me 1 floppie I can test them, and maybe we can swap.
I need a 512 triad memory upgrade, which I believe is sold by Mark Marlette for $50.00.

Let me know if interested...


On 12/18/2017 2:24:31 PM, Gene Heskett <gheskett at shentel.net> wrote:
On Monday 18 December 2017 14:27:13 John Mautz wrote:

> Hello,
> I have had two FD-502 enclosures for a few years now and when I
> installed them today, neither drive worked. I do have and FD-501 with
> 2 drives and it seems to work (I don't have a lot of disks to test
> with). I would like to restore my FD-502 to a 2 drive system in
> working order. Why, because the drives are supposed to be double
> sided.
> Anyone have 2 working FD-502 drives they would be willing to part
> with?
Are you able to remove the drives?

If so. you will likely find the lubricant on the rails the head carriage
slides on, a dried up caked mess. Clean those rods with paint store
alcohol and put a thin film of vasolene or similar very light grease on
them again. If the motor to head carriage connection is a very thin
steel tape, it wouldn't hurt to clean it also as an old film of
cigarette smoke will change its diameter enough to miss track on the
inner tracks. If the motor is on the rear of the drive and has a long
screw shaft, clean the gunk out of the groove in the shaft, and recoat
with vasolene, ditto the tracking wire and the bronze leaf that serves
as the drive nut. All this needs to be clean and lubricated. Quiet, you
can't alway hear them stepping drives, are surefire signs the drive is
due for a clean and lube job. The noisy drive is the one thats stepping
accurately from track to track.

While you have access, wet a q-tip and run it between the head faces to
clean the heads. If any color comes off on the q-tip, toss it, get a new
one and "wash, rinse, and repeat" till the wet q-tip stays clean. But do
not bend them for a better view. Just slip the wet q-tip between them.

> or
> Anyone know of a good source to find replacement drives? (Mitsumi
> Elec. Co. - D502).

These are genuine antiques today, buyer beware.
> Oh, and yes I have and email out to see if the SDC master (Zippster)
> has any CoCoSDC's avail for sale.
> Thanks for the help.
> John.

Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page

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