Re: contact probes

--- 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