[R-390] 390A Drawings, was Engraved front panels

[John Kolb]

On Mon, 10 Mar 2003, Don Reaves W5OR wrote:

> So what kind of machine was used to do engravings?  I'm
> familiar with the badge engravers used at conventions and
> 'fests to engrave names in plastic.  Is that what Tom means
> by 'rotary tool'?  How much set up time and expense would it
> be to take a silk screened panel and engrave it?  Lets hear
> from you machinists.

I'm not a machinist, but I used to watch them engrave dials
for the frequency knobs of Wavetek function generators -
individual to match the pot exactly.

A pantograph was used
<http://www.ies.co.jp/math/java/geo/panta/panta.html>
with a rotary cutter to duplicate characters from a stencil.

Once you get a pantograph that would handle 19" rack panels,
you would then need a stencil set with the proper font.

John

>
> > > >I think most were actually stamped, not engraved, but the
> > > Fowler rigs
> > > >were engraved with a rotary tool.
> > > >Tom N5OFF
> >
> > > console it specifically refers to the engraved labels. Stamping sure
> > > would be a lot faster, but maybe engraving produces a cleaner
> > > letter or less distortion to the metal? This has to be
> > related to the
> > > Bristo/Bristol wrench issue....
> > >
> > > ~Boomer,  KA1KAQ
>
>
> Don
>
>
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