Re: [CAD_CAM_EDM_DRO]floating z axis

bwrfromuk wrote:

> --- In CAD_CAM_EDM_DRO@y..., wanliker@a... wrote:
> > You also might consider a vacuum table to hold the board flat,
> might be
> > easier.......
> > With stops on the sides and ends
> > bill
>
> That will work for routing tracks, but you loose your vac if you
> drill holes unless you make a special vac table for each pcb. What
> about using a spring loaded PTFE shoe attached to the head to flaten
> the board under the cutter?

This will likely drag highly abrasive grit under the pressure foot, and
chew up either the foot, the board, or both. Commercial drill-only
machines have a pressure foot that lifts up during X-Y motion, and
sets down again when the machine gets there. For track milling,
you need something that holds it down all the time. Maybe something
like a furniture caster would work.

Jon