| 
                        Centred
                         Inverted TopView  | 
                
| Block (mm) | Rotate | ||
| X | |||
| Y | |||
| Z | |||
| Tool dia. (mm) | |
| Spindle (rpm) | |
| Feed (mm/min) | |
| Stepover | |
| Stepdown | |
| Contourdown | |
| Depth limit | 
| Finish stepover 1 2mm | 
(c) Jerome Leary 2016
Either a STL file from your computer (in any format, ASCII or Binary).
            Or a CSV or WRL text file which
            includes rows of x, y, z points