Run time variation

Hi, when I do a design and create tool paths in carbide create it says 15mins. Then I load file in carbide motion and run time is 4 mins. Why is there such a big variation?

Thank you,

Rob

This has been going on for a very long time. Even the time in CM is wrong. I think the time in CM is correct for the actual cutting but it takes longer because of retracts, rapids, BitSetter etc. So take even the CM time with a grain of salt.