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.
. A; p7 h, `4 O1 r# {
so  RPM(1)=      
    RPM(2)=
    RPM(3)=
  ~, e- o: F8 e# Y0 V5 A' U# Z    RPM(4)=
# p5 r- W9 H- w
6 h% y& I, w5 Q9 ~# N3 H: ^! x谢谢指教。