High quality and precision is guaranteed
The very nature of CNC Machining as a process leaves very little room for error and high levels of accuracy and precision. This is because it operates from a computer led program, inputting 3D designs that have been developed via CAD (Computer-Aided Design). All operations are launched via a machine interface.
CNC Machined Parts Acid Etched aluminium
CNC Milling allows for high production output. The level at which CNC Machines operate means they are capable of high levels of production due to the automated processes involved. Should a part need to be produced in high volume, with every part meeting the same level of consistency in terms of quality and finish, CNC Milling, is a trusted and popular option. It is particularly easy to program and operate a 3-axis machine, achieving high accuracy at a low cost.
CNC Milling is a less labour intensive process
Using a CNC Milling Machine significantly reduces the amount of labour involved in the production process. At full capacity, the tools used in a CNC Milling machine can spin at thousands of RPM (revolutions per minute), resulting in high production output, while also being a time-saving expense. No manual processes could achieve a similar output. It’s worth noting that the simpler the design is, the less human intervention is needed. For example, if there was a complicated design that required the blank to be moved in the process, this would involve machinists to ensure the process was completed safely and securely.
How to process the CNC milling for PCB?
Like most conventional mechanical CNC machining processes, the CNC milling process utilizes computerized controls to operate and manipulate machine tools which cut and shape stock material. In addition, the process follows the same basic production stages which all CNC machining processes do, including:
- Designing a CAD model
- Converting the CAD model into a CNC program
- Setting up the CNC milling machine
- Executing the milling operation
The CNC milling process begins with the creation of a 2D or 3D CAD part design. Then the completed design is exported to a CNC-compatible file format and converted by CAM software into a CNC machine program which dictates the actions of the machine and the movements of the tooling across the workpiece. Before the operator runs the CNC program, they prepare the CNC milling machine by affixing the workpiece to the machine’s work surface or workholding device, and attaching the milling tools to the machine spindle.
The CNC milling process employs horizontal or vertical CNC-enabled milling machines—depending on the specifications and requirements of the milling application—and rotating multi-point (i.e., multi-toothed) cutting tools, such as mills and drills. When the machine is ready, the operator launches the program via the machine interface prompting the machine to execute the milling operation.
How to select CNC milling machine for PCB?
The most widely used variety of CNC machine, CNC milling tools perform a machining process much like both drilling and cutting. At its most basic, milling uses rotary cutters to remove the necessary excess material from a workpiece as it is fed into the milling tool. It’s a popular industrial solution due to the detailed sizes and shapes that milling can accommodate.
The rotating cylindrical cutter in a CNC milling machine can move along multiple axes to create unique shapes, slots, holes, and details in a part. Most machines operate on three to five axes, allowing the most advanced tools to perform sophisticated machining with extremely complex geometries. In fact, today’s most intricate CNC projects would be practically impossible to produce with manual tooling.
Modern CNC milling machines are assembled as both horizontal and vertical machining centers, and can create precision components from plastics, ceramics, and composite materials, in addition to metals. They come equipped with technical features such as automatic tool changers, tool carousels and magazines, coolant systems, and enclosures.