Doug's DIY CNC Router

Doug built a custom CNC router using NEMA 23 motors and an air cooled 1.5kW Huanyang VFD spindle. The Buildbotics controller talks directly to the VFD over two wire RS485.

Cutting Area33x47x10in
Motors2 x KL23H286-20-8B, 1 x KL232100-36-8B
X & Y Axis20mm ballscrews, 10mm pitch
Z Axis16mm ballscrew, 5mm pitch

To give the CNC extra strength without greatly increasing the weight Doug built a torsion box. You can find the FreeCAD drawings here.

"I found the flattest part of my garage floor, laid a piece of MDF on it to make it even flatter and then started building the torsion box on top of that."