Assembled the full-metal frame using aluminum extrusions and linear rails. Mounted 4× NEMA 23 stepper motors with DM-series drivers for X, Y, and Z axes.
Built a full-metal 3-axis CNC router from bare mechanical and electrical components, featuring NEMA 23 steppers, custom power distribution, Arduino-based auxiliary control, and EMI mitigation for 0.1mm positioning accuracy.
Assembled the full-metal frame using aluminum extrusions and linear rails. Mounted 4× NEMA 23 stepper motors with DM-series drivers for X, Y, and Z axes.
Designed and wired the complete power stack: 36V rail for steppers, separate 24V/12V/5V busbars via DC-DC converters. High-current motor stages and low-voltage logic/telemetry are cleanly isolated.
Implemented Arduino Nano-based auxiliary control with relay board to switch spindle power, drive temperature-controlled cooling fans and work-area lighting, and display spindle RPM/telemetry on a dedicated screen.
Mitigated EMI and step-loss issues by reorganizing cable routing, introducing star-grounding topology, and adding ferrite chokes. Achieved repeatable ≈0.1mm positioning accuracy over multi-hour routing jobs.
Fully operational CNC router with 0.1mm repeatability over multi-hour jobs.
High voltage (36V) and spinning spindle. Always use eye protection and ensure emergency stop is accessible.