CNC Baseboard Coping Machine

 Here's a look at a small CNC machine that I've been working on. It's a device that copes baseboard. I do believe I invented it but let me know if you think otherwise.





The hardware is mostly self-built. It consists of a pair small belt-driven xy cantilevered axes built around a compact Dewalt router. For metrology it uses a Keyence laser displacement sensor.

The system is run by a Pi-4 and MESA 7i96, and a pair of stepper drivers. A pair of relays controls power to motor drivers and to a 110v receptacle for running the Dewalt router and a vacuum. It includes a voltage-frequency converter for interfacing the displacement sensor. 5V power for the Pi and the MESA board is controlled by an Arduino that monitors the power switch and operates a P-channel MOSFET.

The UI includes a 7-inch touchscreen, several small (finger-sized) MPGs, start button, estop, and power switch.

The gcode for the coping profile is generated on-board by scanning a piece of baseboard with a precision laser displacement sensor. After scanning, geometry is presented in a custom UI for some simple smoothness tuning, end treatment, and optional gouging to compensate for profile features that cannot be accommodated by the cutter diameter.

Once the profile is built, vertical and angle offsets can be set on the fly via the MPGs to compensate for tipped baseboard. 

Thanks to all the people on this forum who helped me with this project.

ToDo: add a 45° router adjustment so it can also cope crown moulding.