There’s an obvious X-axis spoilboard with holes for fixturing material, mounted to a gantry for Z-axis travel. Below the big friendly handle on top is the router attached to its own Y-axis carriage.

They created a computer-controlled CNC router that is theoretically unlimited in size. Instead of a gantry, this router uses a human to move the tool over the work piece and only makes fine ...

For those not familiar, small shop CNC routers mount the handheld routers that nearly every woodworker has in their shop on a gantry ... non-rectilinear shaped parts to be accurate and identical.