On Sun, 21 Apr 2019 at 03:34, John Dammeyer <[email protected]> wrote:
> I used the Machinist toolbox to figure out what sort of speed and feed I > needed but ended up running the mill faster (thought I'd read it should be > 3000 but it was supposed to be 2000). Typo error. > OK. So tool bit 0.09375. Two flutes. HSS. Chip load 0.00551. Aluminium bar. > SFM set at 40 which called for 2000 RPM and about 22 ipm That sounds slow at the spindle, I have been running at 8500 rpm and a 2.5mm cutter in tool steel. FSWizard on my phone is suggesting 589 fpm (180 m/min) surface speed, 24,000 rpm and 15 in/min (388mm/min) for your <2.5mm cutter. (So 10x the spindle speed but lower feedrate) I suspect that Gene has the opposite problem, I am suspecting his feed rate was too low if the swarf comes off as dust. (but he didn't specify feed rate) -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and lunatics." — George Fitch, Atlanta Constitution Newspaper, 1916 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
