PicoCNC

Available on Tindie.

A breakout board that, along with grblHAL and a Rapsberry Pi Pico microcontroller, creates a powerful CNC motion controller for devices like routers, mills, lasers and lathes. Using grblHAL, it forms the basis of a motion control system with advanced features.

System builder's Resources

User Manual

Key features of the PicoCNC board.

• Supports up to 4 Axes via Screw Terminal and Pin Header.
• Spindle control.
  • PWM (5V).
  • Direction (5V).
  • 0-10V.
  • 12V PWM supported (via open collector output).
• Limit Switches for each axis.
  • Supports switches or powered proximity sensors.​
  • 12V for better EMI immunity.
  • Separate power input for full isolation
  • Opto-isolated
• Relay support
  • Directly drive up to 7 relay coils via open collector outputs.​
  • Relay Coil voltage selectable between +5V or +12V.
  • Drive up to 11 SSR or Logic Level relays.
• Isolated standard Grbl input controls: Cycle Start, Feed Hold, EStop and Safety Door.​ Opto-Isolated.
• Opto-Isolated Probe input.
• Supports both Pico and Pico W.
• Comunications.
  • USB (via Pico and Pico W)
  • WiFi (via Pico W)
  • Ethernet (via Wiz850io Ethernet Module)
• Micro SD Card socket. Allows storage of GCode programs. GCode programs may be run from the SD Card.
• Dust Collection support.
  • Dust Collection relay and TTL output ganged to Spindle.
  • Header for a switch to manually run Dust Collector.
• Flexible power input. Two 12V sections, one for Stepper/Servo output, relays and spindle control, one for isolated limit, probe and control inputs. The two sections may be joined for the budget conscious builder. On board 5V generation.​
• LED indicators for 12V inputs, +5V​​ and spindle active.
• Open collector outputs allow adding pull-up resistors on the board.
• Expansion headers for I2C, SPI and UART. UART 3.3V/5V translation supported.
• Powered by open source software - grblHAL.