Adjusting device and machining system

An adjustment device adapted to be driven in rotation about a longitudinal axis, for adjusting a cutting tool, comprising:

• a cutting tool carrier element supported for carrying out an adjusting movement,
• a drive unit for driving the cutting tool carrier element and a circuit carrier element having a surface region facing the drive unit for forming at least one electronic control circuit provided for controlling the drive unit,
• wherein two surface points of the surface region are arranged to be connected outside the circuit carrier element by a connecting straight line, end points of which are the two surface points,
• wherein the circuit carrier element is connected in a rotationally fixed manner to a base body of the adjustment device which is rotatable about the longitudinal axis, the base body having a connecting section for connection to a tool spindle,
• wherein when the rotationally fixed connection is realized directly it is realized by means of a screw element connection,
• wherein at least one screw for fastening the circuit carrier element is arranged in a thread of the base body,
• wherein when the rotationally fixed connection is realized indirectly the circuit carrier element is connected in a rotationally fixed manner to a housing which is different from the base body and is connected in a rotationally fixed manner to the base body, and
• wherein at least one screw for fastening the circuit carrier element being arranged in a thread of the housing.