[GreenKeys] Model 19 - Motor speed setting

[Sheldon Daitch]

Roy,

thanks.

What I could not remember is if the mainshaft gear could slide
off the end of the mainshaft without having to take the mainshaft
out of the printer unit.  I just could not remember how much room
there was up under there.  I remembered it was only three screws,
tho!

I never saw any cup shaped mainshaft gears.  They were always made
of phenolic or something like that, with engine cut teeth.  The teeth did
have a slide concave curve, to match the curve of the motor shaft gear.

By the way, it was AP practice to take a few of these mainshaft gears from
the parts stock and soak them in oil, for days on end, prior to using them.
The oil would penetrate the phenolic and give longer life to the gear.

Thanks for adding to this.  I am having to recall all this from memory without
any reference materials.

Sheldon

Roy Morgan wrote:

> At 10:17 PM 2/5/02 -0500, you wrote:
> >Sheldon, it was a long time ago but as I recall I did have to change the
> >motor gear and the mainshaft gear but it seems to me it was not difficult to
> >do.  I don't think it was necessary to remove the mainshaft to replace the
> >gear on the end of it.
>
> I changed gears on a Model 15 not long ago.
>
> The motor gear mounts on the shaft with one screw.
> The mainshaft gear mounts to the end of the mainshaft with three screws.
>
> The manual(s) advise you to set the gear play/backlash if you change
> gears.  This is done by adjusting a screw in the motor plate at the
> opposite end of the motor from the gear.
>
> Apparently early mainshaft gears were solid and later ones were hollow -
> cup shaped. The cup shaped ones uses shorter screws.
>
> Roy
>
> - Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
> 7130 Panorama Drive, Derwood MD 20855
> Home: 301-330-8828 Work: Voice: 301-975-3254,  Fax: 301-948-6213
> roy.morgan@nist.gov --
>
> _______________________________________________
> GreenKeys mailing list
> GreenKeys@mailman.qth.net
> http://mailman.qth.net/mailman/listinfo/greenkeys