nx_pcb_cam.nx

nx_pcb_cam.nx -- SOVEREIGN PCB isolation-milling CAM: copper geometry -> CNC G-code toolpaths. This CLOSES THE IN-HOUSE LOOP of the Omniforge "chips" leg: instead of sending Gerber to an external fab, we mill the board ourselves on a CNC (or a 3D-printer-derived mill) by cutting AWAY the copper around each trace/pad so the remaining copper is electrically isolated. The core operation is geometric OFFSETTING: each trace centreline is offset perpendicular by (copper_half_width + tool_radius) to both sides; each pad gets a square isolation ring at (pad_radius + tool_radius). INTEGER-ONLY / NO-FLOAT: coordinates in micrometers, perpendicular normals via an inlined integer sqrt (proven Newton idiom, exact for axis-aligned segments), coordinates formatted to decimal mm with the SHARED g_mm6 from nx_pcb_gerber (DRY). Reuses the same toolpath family as the slicer/CAM. NEVER-BRICK (#26): emits G-code FILES only; no machine control / firmware writes here. license_tier: ORIGINAL expect_exit: 0