OK guys it is my time to have a reality check. I've found yet another area of machining that I am woefully underspeed.
I know many of you have built small engines from castings. I took the leap and found right away that working to a set of plans is far and away different than just cutting and fitting. Any way, the castings came and I have been poring over the drawings and here is where it began to dawn on me that I was a tad behind the curve.
I need to know how a machinist (can't include myself in that) determines where to start on a rough casting. It appears that a reference point to refer to is mandatory as a place to begin the layout of vitually all other points that are to be machined. Is that true for each plane to be machined? (hor./vert.) It follows that if you don't get the first one right then all the rest are junk as well.If I add to that the differences in each casting then I am even more lost.
This may seem simple but it seems to me that ALL the machining processes must be determined before making any chips.
Tell me gurus of the lathe.......