PCK-CNC is an open-source CNC router that offers decent precision while being fairly affordable. This machine combines high-performance components with an accessible design that suits beginners and CNC hobbyists. Its structure is primarily made with 3D-printed parts, making it easy to build and modify, while critical components are made from aluminum to provide durability and rigidity. The CNC router's working area is 750mm x 490mm, making it versatile enough to handle a wide range of projects, from small hobbyist tasks to more complex work. To achieve good accuracy and reliability, the PCK-CNC uses ballscrews and linear rails, which help achieve far better precision compared to belt-driven systems. It is equipped with an 800W spindle, controlled by a Variable Frequency Drive (VFD). This allows adjusting spindle speed based on the material and milling requirements. The machine is capable of milling plastics, wood, and aluminum, ensuring it meets the needs of various users and applications.

PCK-CNC Router main features:

• Work area 750x490 mm
• Up to 4000 mm/s travel speed
• VFD-controlled 800W spindle
• Ballscrews
• Linear rails
• Integrated electronics
• Semi-enclosed

PCK-Controller

The PCK-CNC features an integrated electronics system, saving space and making the setup more compact and user-friendly. At the heart of the system is the PCK Controller, an open-source controller designed specifically for this project. It is powered by an STM32 microprocessor, offering smooth and fast operation, and runs on the open-source grblHAL firmware. This advanced software enables features like auto-squaring, which improves repeatability and precision during machining.

The controller operates at 48V which allows for faster stepper motor speeds especially those with higher winding inductance. Four integrated stepper motor drivers deliver up to 5A peak current. PCK-Controller also directly interfaces with the VFD for spindle control, enabling continuous speed control with its 0-10V analog output. Safety and reliability are priorities so the controller is galvanically isolated, protecting connected computers from electrical faults. Additionally, it is designed to better withstand electromagnetic interference (EMI), ensuring stable and reliable performance.

PCK-Controller main features:

• 48V power supply
• Galvanically isolated
• 4 independent stepper motor drivers
• Up to 5A peak stepper motor current
• Isolated output for 5th motor
• Opensource grblHAL firmware
• Y axis autosquare
• 0-10V analog output for continuous spindle speed control

One of the standout aspects of the PCK-CNC is its affordability. Despite its advanced features and capabilities, the machine can be built for approximately 1500 USD, making it an excellent choice for makers and hobbyists looking for a high-quality CNC router without a high price tag.

As an open-source project, PCK-CNC is open to collaboration and customization, inviting users to modify and enhance the design to suit their needs. Whether you’re starting your CNC journey or seeking a reliable platform for experimentation, the PCK-CNC provides an accessible and powerful solution for precise and efficient machining.