There are several different types of CNC or Computer Numerical Control milling services offered today. This can make it somewhat confusing for prototype developers or large volume production requirements.
To provide some guidance and clarity on the different options available, here are the basics on 2D and 3D milling services and the advantages they can provide for any precision machining requirements.
2D and 2.5D Milling
In a very simple explanation, with 2D milling, as well as 2.5D milling, the machining is always on the same plane of the workpiece. At the same time, that plane is always on one of the planes of the milling machine.
With 2D milling, the parts are always cut to the same depth on the workpiece. Using 2.5D milling, there can be multiple depths provided on the piece, utilizing the Z, X and Y axis in the process. This is a cost-effective process that is used in large volume as well as prototype development.
The 3D Difference
With 3D milling, all three planes are involved and can move simultaneously to create more complex shapes with different depths on each of the tools in use. In some cases, there may be more than 3 axes used at the same time to move the tools and to control the workpiece.
This type of 3D milling is used for complex contouring of shapes and can be used to create helical cuts and symmetrical or asymmetrical shapes. With this technology, parts can be produced faster as there is no need for manual movement of the workpiece to different equipment, everything can be done with a single machine.
As this is a very exacting process and requires the development of a CAM drawing and model, look for a company with the expertise to not just complete the work, but to also complete the software model.
