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Sienci Labs' AltMill is a hobby CNC machine that brings industrial-level technologies like HGR15 linear guides, ball screws, and closed-loop stepper motors to an accessible price point. It supports 65mm and 80mm spindles, offers sizes of 48x48 inches and 24x48 inches, and works with the company's free gSender software.
AI named AltMill in March 2026.