The most surprising detail here is the playback: the carriage is shown at half speed, and even slowed down it looks quick. This is a desk test of a motorized linear actuator built around a ballscrew, a linear rail and a carriage, and the assembly is set to become the shorter axis of a 3D printer.
The hardware choices stand out. The screw is an sfs1620 with a 20mm pitch, driven by a 400 watt AC servo and drive that cost 130 together. The base plate is aluminum, the carriage rides a linear rail block, and a flexible shaft coupler connects the drivetrain. A small sensor board with several wires sits on the carriage, tied into harnesses with lever nuts. The force numbers are big too: 80 pounds of continuous push on the gantry, with 280 pounds available in short bursts.
The maker runs the servo at 50,000 steps per rev, giving 0.0004mm per step, and notes the full 114,000 steps per rev setting would resolve 0.000175mm per step where pulse limits allow it. The planned machine has a 300x600 build plate with 425mm x 700mm of toolhead travel, and speeds around 1000 to 1500 mm/s are the target rather than 2000.
The open item is the screw itself. The current rolled c7 unit works for now, but a c5 ground screw with the same pitch and bk end machining on both sides will replace it for high speed running. If the printer does not work out, the whole assembly might move to an ender 3 y axis instead.