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.
|Motors||2 x KL23H286-20-8B, 1 x KL232100-36-8B|
|X & Y Axis||20mm ballscrews, 10mm pitch|
|Z Axis||16mm 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."