CNC Machining Certification Exam Guide: Setup, Operation, and Programming

Many pics are omitted, black and white. You have to have good imagination. Example: Visualize a grid on a sheet of graph paper with each segment of the grid having a specific value. Now place two solid lines through the exact center of the grid and perpendicular to each other. By doing this, you have constructed a simple, twodimensional coordinate system. Carry the thought a little further and add a third imaginary line. This line passes through the same center point as the first two lines but s vertical; that is, it rises above and below the sheet on which the grid is placed. ...