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#1 2016-06-28 16:53:25

cc333
Member
From: North S.F. Bay Area, CA
Registered: 2014-05-23
Posts: 575

400k Floppy Drive -- Seized Up Motor?

I decided to run my 128k the other day, but I discovered that the internal drive doesn't work as the motor that spins the disk seems to have seized up.

I can probably fix it, but why would it happen?

It was definitely something I haven't seen before.

Anyone have any suggestions to prevent it from happening again?

c


Main Macs: Early '09 Mac Pro, Mid '12 MacBook Pro 13"
Secondary Macs: Early '08 Mac Pro, Mid '12 MacBook Pro 15"
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#2 2016-06-29 21:31:26

BadGoldEagle
Member
Registered: 2016-06-08
Posts: 16

Re: 400k Floppy Drive -- Seized Up Motor?

Have you tried helping it by hand? That is definitely odd. At first I thought you had a seized up eject motor, as this can happen fairly easily, but I never heard of this.


COOL STUFF: Working original 1984 Macintosh complete with accessories and Picasso kit, I'm looking for a G44 mouse though, so it's not that complete, NIB Newton MessagePad from 1993
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#3 2016-06-29 22:46:18

cc333
Member
From: North S.F. Bay Area, CA
Registered: 2014-05-23
Posts: 575

Re: 400k Floppy Drive -- Seized Up Motor?

BadGoldEagle wrote:

Have you tried helping it by hand?

Not yet. I'll have to give that a try.


BadGoldEagle wrote:

That is definitely odd.

Indeed.


BadGoldEagle wrote:

At first I thought you had a seized up eject motor, as this can happen fairly easily, but I never heard of this.

Yeah, me neither. The eject motor actually works perfectly, hilariously enough, so that's something smile .

c

Last edited by cc333 (2016-06-29 22:47:36)


Main Macs: Early '09 Mac Pro, Mid '12 MacBook Pro 13"
Secondary Macs: Early '08 Mac Pro, Mid '12 MacBook Pro 15"
Playthings: Mac SE/30, 3.0 GHz Mavericks-based HackServe, Many others....
Desired: Lisa, Kanga PowerBook G3, Apple IIc, Apple II, Spare parts, etc.

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#4 2016-08-22 03:20:55

Elfen
Member
From: NYC, NY
Registered: 2015-07-07
Posts: 20

Re: 400k Floppy Drive -- Seized Up Motor?

Turn it by hand and see if it spins. If it does, then its something electrical and not mechanical.

If the motor is seized, take a hammer and tap the spindle lightly to free it. Then squirt some 'Miracle Oil' around the spindle shaft base and let it sit a day or two to let it work in.

I think this is more electrical than mechanical. I've only seen a 400K drive seized up like this only once in my 30+ years in dealing with Macs, and that is because it took a shower. Found it in an electronics junkyard, exposed to the elements for who knows how long and the spindle rusted. It took a lot to get it going again, but it is possible. All the other drives I found that the bournes filter on the logic board died, and in 1 case, the cable was broken (somebody got in there before I did and was a brute about it).

Good Luck with that.

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