Computer-aided milling, or in short form ‚CNC-milling‘, is a fascinating production technique. Together with systems for an automatic tool change, CNC milling centers are capable to produce any number of complex components (parts) in high accuracy.
But how can a machine produce a real component only from a picture (template) of a component on a computer screen?
The central tool for this is a coordinate system, that one can use for example, when measuring from a corner in a room starting from the floor, where to locate the right upper corner of a cupboard.
In this case the corner is 430 millimeters away from the backwall of the room, 1200 millimeters away from the left wall and 1150 millimenters away from the floor.
By this means one could measure each single point of a cupboard and one would have a data-modell of the cupboard related to the bottom corner of the room on the floor.
Data-models according to this principle are produced for components that are planned to be produced on a CNC-milling machine. The computer that controls the milling machine does work with this data-model. The data-model is related to a zero-point of the machine, so to say the room corner in the working room of the machine. With additional information about the tools and about the production process the CNC-milling machine is able to manufacture the component.
It is very nice, that once you have produced a CNC-programme, you can copy them at any way or you can insert them in other programms and you can easily change them, the same way as you can do with other computer documents. This is exactly why the CNC-technology brought such a great success.
Please find some videos and texts explaining different details about CNC-milling on the following sites.