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.
NOTE:  CS=1000 ft/min for carbide insert used.

4 m0 i- ^9 f1 Nso  RPM(1)=      
    RPM(2)=
    RPM(3)=
  g: Q: m7 p+ @9 r* T  L    RPM(4)=

; T. l6 p8 p5 [+ y谢谢指教。