Re: [CAD_CAM_EDM_DRO] Re: EDM wire tensioning

On Friday 07 April 2006 05:27 am, Graham Stabler wrote:

> I certainly like the idea of the shutter (tapered or otherwise) to
> produce a signal. I could possibly modifiy a slotted opto sensor if I
> can find the type with an unprocessed output.
>
> I also found some reflective photo transisters that will produce a
> fairly linear signal over a small range as an object gets closer or
> further from them. They consist of an IR led and phototransister
> positioned next to each other, the non focused type would seem to be
> suitable. They are very cheap so a comparison might be worth a shot.

I am finding both of these type of parts in scrap VCRs... :-)

--
Member of the toughest, meanest, deadliest, most unrelenting -- and
ablest -- form of life in this section of space, a critter that can
be killed but can't be tamed. --Robert A. Heinlein, "The Puppet Masters"
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Information is more dangerous than cannon to a society ruled by lies. --James
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