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.

so  RPM(1)=      
' s0 Y4 q( \. K  R6 P/ }9 u4 E    RPM(2)=
    RPM(3)=
    RPM(4)=

谢谢指教。