CNC题目,再请教。

27149

A 6.5 inch dia shaft is to be machined on a TURNING CTR to 4.5 inch dia in 4 equal cuts. If CONSTANT CS is selected calculate the RPM at the beginning of each cut.
1 J3 S! _9 G! \' MNOTE:  CS=1000 ft/min for carbide insert used.

so  RPM(1)=      
    RPM(2)=
) K5 e. Q: G8 ?' t+ {6 f    RPM(3)=
    RPM(4)=

谢谢指教。