Re: DIY probing

--- 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.