[Coco] Another problem

[Barry Nelson]

Ok, then it is a track alignment or drive speed issue.
To test the drive speed, you can go here ( http://www.jeffree.co.uk/pages/speedmeasurement.html ) and print out the 250/300 RPM image and attach it to part of the floppy drive that rotates the disk.
Or you can measure the disk speed with software.
Disk 06 in http://www.colorcomputerarchive.com/coco/Disks/Utilities/Disk%20Utilities.zip has two programs that should do this:
RPM.BAS
and
*.BAS

Testing the track alignment is much trickier, and you will need to test alignment on track 0, track 17 and track 34 if that is an issue.

On Jul 16, 2015, at 11:12 PM, coco-request at maltedmedia.com wrote:

> Date: Thu, 16 Jul 2015 23:10:54 -0400
> From: "Bill" <cwgordon at carolina.rr.com>
> To: "'CoCoList for Color Computer Enthusiasts'" <coco at maltedmedia.com>
> Subject: Re: [Coco] Another problem
> Message-ID: <005001d0c03e$3193f5b0$94bbe110$@rr.com>
> Content-Type: text/plain;	charset="utf-8"
> 
> But when I put the FD-500 controller on the drives that the 26-3029 was controlling, it will read the disks created when I was using the 26-3029 on the drives they were created on.
> 
> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Barry Nelson
> Sent: Thursday, July 16, 2015 7:40 PM
> To: coco at maltedmedia.com
> Subject: Re: [Coco] Another problem
> 
> The 26-3029 floppy disk controller has adjustment potentiometers that are known to go out of adjustment. Often when this happens, the controller can only read it's own disks.