[time-nuts] Rakon HSO-14
kb8tq at n1k.org
Sat Feb 3 20:05:37 EST 2018
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.
> 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:
>>>  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
> 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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