Re: contact probes

Well....you may have hit on the problem. I needer more power in my
digitizer so I scaled everything up a bit. I was using a metal
cutting solid carbide two flute but I just remembered when reading
your post it is a left hand spiral with right hand cut. It's throwing
the chips down! It was brand new, super sharp and it never dawned on
me the spiral might not work! Thanks again.

Mike


--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler" <eexgs@...>
wrote:

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "guzakaka" <nonna01@> wrote:
> >
> > Hi Graham,
> >
> > Not linear but circular. I tried cutting fast but I found the
> > circular cuts were not round. I tried pre-drilling and then
> > taking .010" cuts, but at 22,000 rpm I still had plastic sticking

to

> > the bit. It is delrin btw. I slowed the feed down to as low as 10

ipm

> > with the small cuts but still no good. Yesterday I tried some

glass

> > filled nylon and that was disaster! I have some phenolic

impregnated

> > wood laminate that I may try.
> >
> > Mike
>
> I run my little mill at 20krpm and have no problems, perhaps its the
> cutter. I tend to use two-flute carbide milling cutters.
>
> If anything with smaller cutters your spindle speed is low so the

feed

> rate will need to be low possibly lower than 10ipm, it is smaller
> stuff after all so you aren't going far.
>
> Graham
>