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.
# X" k  h- {/ P: a5 g2 i' [NOTE:  CS=1000 ft/min for carbide insert used.
5 y& \5 h% ~$ ~% L; A
so  RPM(1)=      
    RPM(2)=
9 k+ Z: U! a# x0 @7 _0 F  J    RPM(3)=
, Y5 }8 O5 j( n5 O1 ^    RPM(4)=

谢谢指教。