Re: DIY probing

--- In CAD_CAM_EDM_DRO@y..., "John Wasser" <Yahoo@J...> wrote:
> --- In CAD_CAM_EDM_DRO@y..., ccs@m... wrote:
> > > The circuit is closed as long as the three rods touch all
> > > six contacts.
> > So is it just gravity that holds it against the contacts, or are
there springs?
>
> A spring was used to hold the probe down. You want to use a light
spring to keep the contact pressure to a minimum. You don't want the
probe shaft to flex much before the contact breaks.