[Perry] was interested in adding a 4th axis to his CNC machine, but not very excited at the prospect of spending hundreds of dollars on the parts and electronics to make it work. There is a very ...

the x-axis (horizontal) and the y-axis (vertical). To find a point's coordinates, first read along the x-axis and then up the y-axis. On the grid above, the point is 4 units along the x-axis and 3 ...