Re: [CAD_CAM_EDM_DRO]Breaking cutters OT

Hi Alan and all:
     A year and a half ago I cut a mold cavity in S7 tool steel with 1/16" and 1/32" ball nose cutters.  I was able to cut a 1/16" circular groove  with the OD being .875" in diameter .065" deep in four cavities with just one four flute solid carbide cutter.  The key was using shallow depth of cut and a find feed rate.  I was limited to only 2,800 RPM so I had to use a low inches per minute feed rate of around 1/2" or less as I calculated it down to appox. .00008" to .0001" feed per tooth or chip load per tooth.  Just email me if you want more info.
                                                  GOD'S BLESSINGS
                                                        Bill

   15:06:19 -0800 (PST), Alan Rothenbush wrote

>  
>
> Hmm, EDM in a raster format .. with raster of course being the key ... hmmm
>
> Anyway, thanks to all who responded to my original request about laser "etching", even if I didn't like most of the things that any of you said! <G>
>
> It sounds like I'm back to breaking tiny little cutters until I find the RPM/Feed rate sweet spot.
>
> Alan
>
> --
> Alan Rothenbush
> Client and Research Services
> IT Services
> Simon Fraser University
>
> ----- "Roland Jollivet" <Roland.Jollivet@...> wrote:
>
> > I still think (without trying) that good resolution PCB etching could
> > be
> > obtained using a fine wire and EDM or ECM in a raster format.
>
>

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