MotionMevideo
What do you need to build a DIY CNC at home?
September 19, 2026 · 20 min · 6K views
What this video covers
Building a DIY CNC machine requires a rigid steel frame, precise motion components, and a dedicated electrical control system. The structure relies on square steel tubing, which must be perfectly square to ensure accurate cuts; a Smarter DM250 MIG welder facilitates the assembly of these steel components.8:35 For motion, the design utilizes steel angle iron and polyacetal rollers rather than expensive linear rails to reduce costs by approximately 50%.6:29 High-torque NEMA 23 motors from OceanTech drive the axes via helical racks.2:59 A 1.5kW air-cooled spindle provides cleaner cuts for aluminum than a manual router, though it requires a frequency inverter for speed control.13:24 The electrical cabinet houses the power supplies, motor drivers, and a controller that supports custom firmware.2:59 Essential tools for the build include a drill, a number 5 tap for threading steel, and a 3D printer like the FLSUN V400 for custom spacers and brackets.8:35 Proper safety gear, specifically a high-quality 3M respirator, is critical during fabrication and painting.2:59
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