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)=      
    RPM(2)=
" p$ `4 C$ f$ M( Q1 Q    RPM(3)=
    RPM(4)=

! t" l/ z2 p5 z( x* ~  p谢谢指教。