RRW_LAB aka Remora RPi/W5500 LinuxCNC Adapter Board is a CNC controller board for use with LinuxCNC, in conjunction with a STM32 Blackpill board as the MCU to interface with Ethernet or Raspberry Pi. The board exists for the single purpose to promote the Remora project, with he design goals to be affordable, easy to make, and accessible while still retaining the core features.

The board is not made for performance, it was made to work adequately, with a simple setup.

The board is still in beta testing; pinout, configs, firmware, formfactor, etc are likely to change in the future.

Documentation https://github.com/cakeslob/Remora-docs/blob/nucleo/docs/source/hardware/blackpill.rst

Remora RPi SPI Firmware Source https://github.com/cakeslob/Remora/tree/blackpill

Remora W5500 Ethernet Firmware Source https://github.com/cakeslob/Remora-STM32F4xx-W5500/tree/blackpill

Pre-Compiled Firmware located in /FirmwareBin/

LinuxCNC configurations and Components located in /LinuxCNC/

Features:

• 2 board variants
• Ethernet or Raspberry Pi SPI interface
• STM32 Blackpill F4x1 or Blupill F103 as MCU
• 3 to 5 axis
• 8 Digital IO
• 1 Highspeed encoder
• 1 Spindle PWM

Variants:

Stepstick Version:

• 3 Axis with Pololu stepper moter driver support (stepstick)
• 6 Inputs
• 2 Outputs
• 1 Highspeed encoder
• 1 Spindle PWM

DB25 Version:

• 5 axis support with DB25 CNC Breakout Board
• 5 Inputs
• 2 Outputs
• 1 Highspeed encoder
• 1 Spindle PWM

Interface:

Raspberry Pi via SPI

Ethernet via W5500 Lite module (shown in photo below)

Pinout

Note: V0.1 has wrong pins assigned to the hardware encoder. This will be changed with v0.3

Stepstick

DB25