[Coco] Calibrating disk drives

[tonym]

Didn't one of the OS-9 disks, don't remember if it was L1 or L2, actually have a program telling you drive spindle speed?!?

Coulda' sworn one of them did...

Tony
tonym at compusource.net


---- Original Message ----
From: "Benoit Bleau" <benbleau at gmail.com>
Sent: 6/5/2014 9:26:22 AM
To: "Spencer" <spencerjar at yahoo.com>, "CoCoList for Color Computer Enthusiasts" <coco at maltedmedia.com>
Subject: Re: [Coco] Calibrating disk drives

Spencer,
I remember that my old TEC drive ( 26-3022?)  had a tendency to slow down.
 When open the drive , you should see a stroboscopic design printed on the
disk "flywheel" .   There's a potentiometer right besides it that you can
use to adjust the speed.  My memory is a bit fuzzy, but I seem to recall
that using a fluorescent light, it would be easy to tune the speed of the
drive.   There's also some utilities that can mesure the drive speed. I
think that the Kilgus DOS programs had a speed utility ( EDTASM Disk, and
Disk Scripsit).  This would give you the RPM of the drive, and you can
easily adjust the speed of the drive while running the utility.

Benoit.


On Thu, Jun 5, 2014 at 8:16 AM, Spencer via Coco <coco at maltedmedia.com>
wrote:

> Greetings all.
>
> I have a 26-3022 and 26-3029 drives;  both write to disks fine, but when I
> put one disk from one into the other I get the dreaded ?IO Error.  Someone
> told me one or both drives are out of calibration and will ultimately fail
> 100% at some point.
>
> I've never calibrated drives myself.  Is this something that can be done
> at home or is there specialized equipment needed for this?   Or is there
> anyone out there that knows a place that can recalibrate them?
>
> Thank you!
>
> --
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>

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