So I use CamBam for one reason, I can generate holding tabs. Recently I came up with a project that for me is rare. I have to hold a fairly tight tolerance on a circle and a rectangle. That said, they are a simple four inch circle and square. Problem is the Four inch figures are not cutting Four inch they are cutting Three and Seven Eighths on a side and in diameter. I made the discovery when I finally took a look at the code CamBam had generated the center line tool path was short by about .0625 giving me an over all undercut of 0.125. My question is why is this happening? I've gone through and changed my tool table to make sure that everything is equal to the bits I'm using. The only thing that has worked so far is to generate the code and manually change the lines most effected which are basically my last Rough cut lines and the Profile lines I use for the finish cut. The numerical change is small but makes a big a difference. Computer Aided Machining Because Accuracy Matters?