Abstract: Workpiece storage device having at least one sensor; a control device; and pick-up device with receptacles individually adapted to shapes of workpieces to be received in the receptacles. The at least one sensor is configured to acquire sensor data to determine the presence and/or location of workpieces in the receptacles, and to transmit the sensor data to the control device. The control device is configured to receive the sensor data of the sensor and to feed the received sensor data as input values to at least one machine learning model, and the machine learning model is trained to calculate at least one binary output value from the input values. The at least one binary output value is indicative of whether a statement about a loading state of the pick-up device is applicable, and the control device is configured to generate a signal including the at least one binary output value.