drag knife was Re: Milling Glass

Tom,

You are correct. A drag knife cutter is a "compromise" technique. The
trick with a drag knife is to minimise the distance from the center
of rotation to the cutting point. Commercial drag knife cutters have
this down to about .020, so as I mentioned, it works "good enough"
for larger things.

Hope this helps.

Ballendo

--- In CAD_CAM_EDM_DRO@y..., "Tom Eldredge" <harmonyt@r...> wrote:
> Ballendo,
>
> I built a tangental vinyl cutter about 7 years ago, and used
Dancam. It
> worked pretty well. On your drag knife design that you are
describing here,
> how do you compensate for the fact that the blade is behind? Don't
you need
> some sort of radius compensation? It would seem that right angle
turns
> would be cut off.
>
> Tom E.