With the cabin closed, the welding robot begins a cycle that will last 65 minutes (compared to 120 minutes in manual welding). The aim of this robotised cell is to join pointed elements together, including a metal spiral on a hollow conical axis. Eventually, this screw, weighing about 400 kg, will be one of the elements mounted at the heart of the Lucas G machines.
The trajectories of the torch are complex because they are alternately carried out on the surface and on the underside of the conical screw with a constant transverse sweep of a few millimetres perpendicular to the progress of the welding. In addition to the six robot axes, the numerical control continuously manages three additional axes, one linear and two rotational, for a total of nine axes.