On Tuesday 27 September 2016 13:19:49 Jon Elson wrote:

> On 09/27/2016 10:36 AM, Gene Heskett wrote:
> > On Tuesday 27 September 2016 09:29:47 Ken Strauss wrote:
> >> The discussion has been regarding the optically coupled probe. Has
> >> anyone had success with the inductively coupled ones? Is it
> >> feasible to make your own IMM module?
> >
> > I'd have to say you could, but these machines are generators of a
> > large amount of magnetic noise. So I'd say not magnetically coupled,
> > but radio coupled just to get above the frequency of the machines
> > own noises.
> Yes, it seems Blum and Renishaw have moved to RF
> communication, and seem to be in the 800 MHz to GHz bands!
> I guess the problem is no matter where you put the IR
> transceiver, somebody would end up putting an obstruction in
> the way, and then you break the probe tip. I did rig the
> loss of signal watchdog to stop the machine, and it seems
> like a really good idea.
> Jon
We are in what I've been known to call violent agreement on that point 
Jon. I recall now, about 2 years back, Dee  buzzed me on the intercom 
thats part of our basket of wireless phones here, in a total panic, 
wanted fresh batteries in the remote as she was missing one of her fav 
game shows.  On my arrival with a pocketfull of batteries, the first 
thing I noticed was she had set something in front of the tv's IR 
window.  I reached over and handed it back to her & told her to try it 
again.  Of course it worked, much to her amazement, it had never been 
grokked that if she couldn't see that window, she didn't have a remote.  
OTOH, she had cataracts removed from both eyes since, and its entirely 
possible she could not see that little black square in the bottom of the 
black face frame.  She sure can now.
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Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>

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