If you use TNC430 as your machine controller, it should have a function call "RTCP", as I remember. Usually we have to make special statement "M128" in your NC path to avtivate the function.
So you do not need to input the machine kinemetic offset value into PostBuilder. Because the controller already have them in itself!! If you input these value in PB, there will be result in wrong output!
Sorry to type in English, cause I cannot type in chinese after the iCAX fourm change server. I am sure Wave have many experience in using M128 function.