Re: [CAD_CAM_EDM_DRO] Re: Re: Digitizers, Renishaw (for bill phillips)

Thanks Ian, another good idea. I will look at the crystals first because I
happen to have a variety of them to wreck. If not a trip to the junk
electronic shop at Cheltenham may be in order.

regards
Bill Phillips
in slightly eclipsed Stroud.

>Hi Bill,
>
>One place I've acquired small piezos from is record player stylus'. I bought
>several a while back from a surplus electronics shop at 20p (about 32 cents)
>each. They were the simple type found on cheap record players but the piezos
>were good enough for my needs. I used a couple of them to make microphones
>for listening to the tick of watches and clocks and inputting the sounds
>into a computer program for analysis. I just tethered one end of the piezo
>to a block on the clip/mounting with epoxy and when the clip is fastened to
>a watch or clock, the vibration of the free end is enough to produce a good
>signal. These piezos are usually in the form of a small rectangular rod,
>maybe 1/2" x 1/32" x 1/64".
>
>Ian
>--
>Ian W. Wright
>Sheffield UK
>www.iw63.freeserve.co.uk