Can a CNC router cut aluminium?
Yes, a CNC router can cut aluminum, which is a relatively soft, lightweight, and easily machinable metal. However, it is important to consider several factors to achieve clean and precise cuts when working with aluminum on a CNC router:
Tool selection: Use a cutting tool specifically designed for aluminum, such as a solid carbide end mill with two or three flutes and a helix angle optimized for chip evacuation. This helps to prevent chip buildup and ensures better surface finishes.
Feed rates and spindle speeds: Adjust the feed rate and spindle speed to suit aluminum cutting. Using a slower feed rate and a higher spindle speed compared to woodworking can help prevent the aluminum from melting and sticking to the cutting tool.
Lubrication and cooling: Use appropriate lubrication and cooling methods, such as compressed air or a mist coolant system, to minimize heat buildup during cutting. This helps to prevent aluminum from melting and sticking to the cutting tool, extending tool life and improving cut quality.
Chip evacuation: Ensure proper chip evacuation by using an appropriate vacuum or dust collection system to prevent chip buildup and maintain a clean working area.
Rigidity and stability: Make sure the CNC router is rigid and stable enough to handle the cutting forces generated when cutting aluminum. Some lighter-weight CNC routers may not be suitable for cutting aluminum, as they may lack the necessary rigidity, leading to vibration and poor cut quality.
By following these guidelines and optimizing the cutting parameters for aluminum, it is possible to achieve clean, precise cuts with a CNC router. However, keep in mind that CNC routers are generally better suited for softer materials like wood, plastics, and foam. For more demanding aluminum cutting tasks or working with harder metals, a CNC milling machine would be a more appropriate choice.
