Oh heck it booted

From: Don Maslin <donm_at_cts.com>
Date: Mon Aug 3 00:37:01 1998

On Mon, 3 Aug 1998, Tony Duell wrote:

> > A year or so ago, I made up a replacement 'tire' (tyre for you, Tony) for
> > a drive in an old Televideo TS816 from a rubber grommet. Fortunately,
> > the spindle was about .25" and the groove diameter of the grommet was
> > slightly larger than the diameter that the tire needed to be. I was able
> > to cut and sand it down to the desired diameter and cement it onto the
>
> Actually iso-cyano acrylic hydro-copolymerising adhesive (superglue in
> the UK) is very good at sticking rubber. You can make quite good O-rings,
> and even drive belts by cutting a length of rubber cord and gluing the
> ends together.
>
> So you might have been able to cut a piece radially out of the grommet
> and glue the edges together.
>
> > spindle. Worked like a champ! When I did it, I used a lathe to spin a
> > rod on which the grommet was mounted, but an electric drill would
>
> Hmmm.. I have a small lathe (IMHO _all_ computer preservationists need
> one, like you need a 'scope, logic analyser, soldering iron, etc, right
> ;-)). But rubber is not the easiest material to turn to size - my guess
> is you need to take a very light cut...

With a very sharp cutting tool!
 
> As a kludge, and to ensure it is concentric with the spindle, why not use
> the drive motor ? Put the oversize tyre on the spindle, get the motor
> turning (a knowledge of how the drive operates, and the interface
> signals, helps), and take a light cut over the surface with a sharp knife
> blade.

Rather dependent upon the drive. In many, the tyre is rather
inaccesible, and then there is the risk of jamming things up with rubber
dust/shavings.
                                                 - don

> -tony >
>
Received on Mon Aug 03 1998 - 00:37:01 BST