Elevator system with increased landing accuracy

An elevator system in which an elevator car is moved in an elevator shaft between two adjacent floors of a building using a traction sheave drive, the elevator system comprising:

• an elevator control unit for moving the elevator car from one of the floors to the other of the floors by controlling the traction sheave drive with a control signal determined using a value for a diameter of a traction sheave of the traction sheave drive;
• a device determining a position of the elevator car, the device including a sensor device that detects during travel of the elevator car position flags fastened in the elevator shaft;
• wherein the elevator control unit controls the traction sheave drive after an initial configuration of the elevator system with an iterative adaptation of the value for the traction sheave diameter used to determine the control signal to increase a landing accuracy of the elevator car;
• wherein the position flags each have a predetermined length in a direction of travel of the elevator car;
• and
• wherein a defined amount by which the elevator control unit changes the value of the traction sheave diameter during the iterative adaptation is dependent on the predetermined length of the position flags.