how to adjust a faulty 5.25" drive

["Ernest" <leucoplast@seanet.NOSPAM.com>]

I have a couple of Micro-SCI floppy drives that are having a hard time
reading disks. They both power on and seem to work OK but one drive won't
read disks at all, and the other seems to be on edge of not being able to
read. Basically, I think they just need to be adjusted a little but I've
never done that and I'm not sure of how it's done.

These drives have two adjusting pots. One pot is on the card that is on top
of the drive, and the other pot is on the back of the drive. The top pot is
small and fat an the back pot is long and skinny.

Can anyone give me some tips on how to re-align these drives? Are there any
utilities that make the process easier?

Thanks.

E.