and 3D printing are two common methods used in the manufacturing industry for creating custom parts and products. While both methods can be effective, they differ in several important ways. Below, we explore the differences between CNC machining and 3D printing to help you determine which method is right for your needs.
1. Difference in materials
3D printing uses various materials such as liquid resin (SLA), nylon powder (SLS), metal powder (SLM), gypsum powder (full-color printing), and sandstone powder (full-color printing). These materials are used to create a three-dimensional object layer by layer.
On the other hand, CNC machining starts with a solid block of material, such as metal or plastic, and uses cutting tools to remove material and create the desired shape.
CNC machining offers more options for material selection than 3D printing. It can work with a wider range of materials, including exotic alloys and high-performance plastics, that are not suitable for 3D printing.
2. Difference in Processing Accuracy
While 3D printing has advanced in recent years and can achieve high levels of precision, CNC machining is generally more accurate and precise. CNC machines can typically achieve tolerances of +/-0.1mm or even better, making it a good choice for applications that require tight tolerances.
3. Difference in Processing Size
The maximum size that 3D printing can make depends on the size of the printer's platform. For FDM (Fused Deposition Modeling) printers, the maximum size is typically around 400mm x 400mm x 400mm. For SLA (Stereolithography) printers, the maximum size is usually around 600mm x 600mm x 400mm.
As for CNC machining, the maximum size that can be produced depends on the size of the machine and the size of the workpiece that can be accommodated. There is no single maximum size for CNC machining, as it can vary greatly depending on the specific machine being used. However, some large CNC machines can accommodate workpieces up to several meters in size.
In conclusion, while 3D printing and CNC machining are both valuable manufacturing techniques, each has its own unique advantages and disadvantages. CNC machining is preferred for parts that require high precision, while 3D printing is useful for creating complex shapes and rapid prototyping. By understanding the differences between the two techniques, you can make an informed decision on which method to use for your specific needs.
