Re: disk ][ speed adjustment

[nparker@cie-2.uoregon.edu (Neil Parker)]

In article <59canb$862$1@blackice.winternet.com> skezer@winternet.com (The
Skeeez...) writes:
}Dakin Williams (ddwilliams@bosco.meis.uab.edu) wrote:
}: It has been some time since I've had to adjust the speed on my Disk ][
}: drive.  Long enough, in fact, that I've forgotten how to do it!  I
}: pulled the cover off the drive, but none of the screws jumped out at me
}: as being the correct one to turn.   So I turned a few on the analog
}: board and behind, but none changed the disk speed as it ran.  Page 146
}: in the DOS Manual didn't illuminate much for me.
}: 
}: 	Can anyone with keen powers of description tell me exactly which screw
}: (?) it is that changes the speed of the drive?  Location, color, nearby
}: landmarks, etc.?  I am surprised to have forgotten this!
}: 
}: 
}: D. Williams
}
}When you pull the cover off, on the very back halfway up the side there's
}a little blue block mounted horizontally with a screw.. it's on the right 
}side of the drive.. I assume your running a disk speed analysis program...
}Think it might be kinda hard to calibrate it otherwise.....

A disk speed analysis program is certainly helpful, but you don't need
it...it turns out to be possible to calibrate a 5.25-inch drive with only a
a couple of screwdrivers, a blank disk, and a 60-Hz light source.

A while back I posted an article describing the procedure.  Nathan Mates
preserved a copy of it, and you can find it together with the FAQ stuff at
http://www.visi.com/~nathan/a2/faq/disk.spd.html.

               - Neil Parker
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