A machining center earns nothing between 18:00 and 06:00 unless something keeps feeding it.
A dedicated 410 × 308 mm automation door, CNC-controlled and standard on every machine, gives the robot its own way into the work area, so the operator door stays free for people. Workholding is machine-controlled: an optional hydraulic feed-through machine table carries an AMF 6204IHA K10.2 zero-point interface, and an optional zero-point vise pallet with a Spreitzer HZS 120-60 A hydraulic centric vise gives the robot a gripping interface. An optional automatic rear door lets the robot reach the tool magazine. With 78 tools in the magazine and one in the spindle, sister tools stand in when a tool wears, and the Renishaw NC4+ Blue F145 tool setter (optional) catches breakage between cycles.
The robot cell is quoted per configuration, because the gripper, the part storage, and the cycle logic follow your parts. See how it is priced.