Mac 400k floppy drive alignment?

dwight elvey dkelvey at
Sun Jan 4 22:20:52 CST 2009

> From: derschjo at
> Got myself an ancient external 400k mac floppy drive on the cheap that
> I'd like to use on my 128k mac -- after cleaning out the old dried
> lubricant and getting the drive mechanism running again, the drive works
> but will only read/write disks that it has formatted, which leads me to
> believe that the drive is out of alignment. How is alignment corrected
> on these drives?
> Thanks!
> Josh
 Like any other drive, you need an alignment disk for a 400k drive.
That would be a tough one.
You can always just experiment some. Before moving the stepper,
make sure the track zero is in the right place. After a recal,
measure the distance the head is from the spindle. It should be
close to the same for both drives.
 If the track zero is right, try the stepper next.
It’s the same Hotmail®. If by “same” you mean up to 70% faster.

More information about the cctech mailing list