A machining unit, particularly for machining the surface of cylindrical cavities, including:
- a fixed supporting structure;
- a bench for supporting a workpiece that is to undergo machining;
- a machining head, mounted and guided in such a way as to be displaceable at least in two directions orthogonal to one another with respect to the fixed supporting structure;
- a motor-driven spindle, rotatably mounted on the machining head;
- a tool-holder assembly, connected in a decoupleable way to one end of the motor-driven spindle;
- at least one tool, carried by the tool-holder assembly in such a way that it is adjustable in a direction substantially radial with respect to the axis of rotation of the spindle;
- an electrically controlled actuator, mounted on the tool-holder assembly for governing the radial displacement of adjustment of the at least one tool;
- and
- an electronic control system for governing the electrically controlled actuator for controlling the tool position, the electronic control system comprising:
- an electronic control unit located in a stationary position with respect to the fixed supporting structure of the machining unit;
- a wireless communication system including one or both of a wireless transmitter and a receiver device, situated in a stationary position with respect to the fixed supporting structure;
- and
- one or both of a wireless receiver and a transmitter device, mounted on the tool-holder assembly.