[time-nuts] Rakon HSO-14
Bruce Griffiths
bruce.griffiths at xtra.co.nz
Sun Feb 4 01:15:47 UTC 2018
Fluid jet polishing perhaps?
At least on fused quartz and optical glass there is no associated subsurface damage.
Bruce
>
> On 04 February 2018 at 14:05 Bob kb8tq <kb8tq at n1k.org> wrote:
>
> Hi
>
> If you try “normal” machining techniques on a resonator, you are very
> likely to create micro cracks in the material. Those are *really* bad for
> aging and a few other issues ….. Much of the normal production flow of the
> quartz is designed to keep the processes like sawing far enough away
> from the “end product” that more gentle techniques can be used to remove
> the (possibly) damaged material.
>
> Since the slots are pretty darn small, there isn’t a lot of room for this and that
> to be done when making them. There may well be better ways to do the
> work today than back 20 or 30 years ago. It would still take a *lot* of effort
> to validate a process.
>
> Bob
>
> > >
> > On Feb 3, 2018, at 7:24 PM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> >
> > --------
> > In message <0f9a9acc-4cdf-780f-e633-6162622641e3 at earthlink.net>, jimlux writes:
> >
> > > > >
> > > > > > >
> > > > [1] Surprising to me is that modern dentists are highly kitted for
> > > > CNC-ing very hard ceramic materials at high precision.
> > > >
> > > > > > >
> > > But, small "tooth sized" pieces - how big is your crystal.
> > >
> > > > >
> > Well, they appearantly make a mouth-full at a time, so that is
> > covered...
> >
> > I don't think the dentist machines are precise enough though,
> > as I understood it, the state-of-the-art stuff has built in
> > laser-interferrometers etc.
> >
> > --
> > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
> > phk at FreeBSD.ORG | TCP/IP since RFC 956
> > FreeBSD committer | BSD since 4.3-tahoe
> > Never attribute to malice what can adequately be explained by incompetence.
> >
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