Re: [CAD_CAM_EDM_DRO] Re: low cost linear encoders

In a message dated 3/16/00 2:07:22 AM Mountain Standard Time,
Ian@... writes:

<< but I can't think of either how they
would sense the presence or absence of copper without touching it ( >>
It is a capacitance based system, at one time there was an article in one of
the HSM magazines about a guy making the strips at home, maybe someone will
remember it.
bill