you can program your mill anyway you prefer.
If you think in RPM simply convert by ((RPM * DIA) / 3.82= SFPM)
feed per minute is G98 to calculate use (RPM * ipr= ipm)
feed per revolution is G99 (setting 56) to calculate use ( ipm / RPM= ipr)
I'm not sure what the max feed/rev is on your mill.Be careful!!!! if you leave it in IPR (G99) and have even a small feed command from when you were using IPM (G98) feeds, it might get ugly.
Feed in IPR is actually pretty handy if you want to always maintain a constant chip load (even when you overide the spindle speed )
AC |