8" IBM Floppy Drive - Let's do this!

8" IBM Floppy Drive - Let's do this!

Postby Paleorama » Sat Mar 16, 2013 10:26 am

Hi guys,
I finally managed to find a f'ing 8" FDD on ebay! It was only $50 - the shipping was $60 LOL!

Image
- Compared to the 3,5" inch FDD this thing is HUGE!

I had to do this but I am still baffled about how to approach this. The voltage supply has a sticker on it that says 400V. I am still not sure if that means it needs 400V from the power line or if it sort of transforms the 230V in the wall to 400... And you guys in the US, aren't your power lines 110V AC?
Image


One thing that'll be easy is the heads - big fat cables with a pin-header connector on the circuit board. Everything is DIP chips and big ol' schoo' components. Me like.
Image
Image

But I would like some help, any help, from you guys in here on how to approach this. If you know anything about these kind of drives or have links to datasheets and service manuals. The power issue is first priority as I am reluctant to plug this into the wall.

Best regards from
Paleorama /Dogenigt
Paleorama
 
Posts: 32
Joined: Wed Sep 28, 2011 6:06 am
Location: Nimheim, Denmark

Re: 8" IBM Floppy Drive - Let's do this!

Postby guest » Tue Mar 19, 2013 10:40 am

that thing is pretty cool.

i would bet that the 400V is made from rectifying the 230V, so just avoid touching those parts.
guest
Site Admin
 
Posts: 449
Joined: Thu May 20, 2010 11:58 pm

Re: 8" IBM Floppy Drive - Let's do this!

Postby Paleorama » Tue Mar 19, 2013 11:30 am

guest wrote:that thing is pretty cool.

i would bet that the 400V is made from rectifying the 230V, so just avoid touching those parts.


Ah, I thought so! So the 230V AC is turned into 400V DC?
Paleorama
 
Posts: 32
Joined: Wed Sep 28, 2011 6:06 am
Location: Nimheim, Denmark

Re: 8" IBM Floppy Drive - Let's do this!

Postby guest » Tue Mar 19, 2013 8:18 pm

thats one possible explanation. 230VAC is just the average voltage of that sinusoid. the peak to peak voltage is actually the square root of 2 times that, or 230VAC x 1.4 = 322Vpp.

check to see where the wires go. if they go to the spindle motor, then its just the start capacitor for the motor, and only AC is across it. still dangerous, though.
guest
Site Admin
 
Posts: 449
Joined: Thu May 20, 2010 11:58 pm


Return to Floppy Audio Project

Who is online

Users browsing this forum: No registered users and 1 guest


cron