Working 8" Floppy drives???

From: Tony Duell <ard_at_p850ug1.demon.co.uk>
Date: Thu May 8 17:52:01 2003

> Among other reasons for doing it is that I have an RX01 that came from
> a client with a siezed rotation motor on one drive and a siezed head
> positioner motor (with attendant incinerated head motor driver

I am suprised about that. A stepper motor draws much the same current no
matter whether it actually rotates or not, so the transistors shouldn't
have been damaged...

IIRC, it's possible to remove the bearings from the stepper motor in the
RX01 (circlips on the end), although you probably have to remove the
motor from the drive, which means you need an alignment disk to put it
back again. If the windings are still good, you can replace the bearings
if necessary.

There were several spindle motors used. Some of them come apart easily
(and can be cleaned, etc), the latest one, commonly used in RX02s, is
almost impossible to take apart. Often, though, removing the plastic
covers over the bearings and putting some machine oil (not Wanton
Destruction 40, OK!) on the bearings will get it running again. If not,
the spindle motor is fairly easy to substitute.

-tony
Received on Thu May 08 2003 - 17:52:01 BST