An arrangement for adjusting a blade gap in a refiner, the arrangement comprising at least one loading device arrangeable to move at least one refining element (3, 4, 6, 7) of the refiner in respect of at least one another refining element (3, 4, 6, 7) of the refiner for adjusting the blade gap between the refining elements (3, 4, 6, 7), at least one vibration measuring device for measuring a vibration of the refiner in operation, and at least one control unit configured to adjust the blade gap between the refining elements (3, 4, 6, 7) by controlling the at least one loading device to move the at least one refining element (3, 4, 6, 7) in respect of the at least one another refining element (3, 4, 6, 7) based on the measured vibration of the refiner, wherein the at least one control unit is configured to control the at least one loading device to move the at least one refining element (3, 4, 6, 7) towards the at least one another refining element (3, 4, 6,7), to receive from the vibration measuring device a vibration measurement signal describing the measured vibration of the refiner, to compare the received vibration measurement signal to a condition (SET-V) settable for the vibration of the refiner, and to control the at least one loading device to move the at least one refining element (3, 4, 6, 7) away from the at least one another refining element (3, 4, 6, 7) in accordance with a settable distance (SET-BW) in response to the vibration measurement signal fulfilling the condition (SET-V) settable for the vibration of the refiner, characterized in that the at least one control unit is configured to control the at least one loading device to move the at least one refining element (3, 4, 6, 7) towards the at least one another refining element (3, 4, 6, 7) periodically in accordance with a settable distance (SET-FW) at a settable time interval (SET-T) after the at least one refining element (3, 4, 6, 7) has been moved away from the at least one another refining element (3, 4, 6, 7) in response to the vibration measurement signal having fulfilled the condition (SET-V) settable for the vibration of the refiner. at least one loading device arrangeable to move at least one refining element (3, 4, 6, 7) of the refiner in respect of at least one another refining element (3, 4, 6, 7) of the refiner for adjusting the blade gap between the refining elements (3, 4, 6, 7), at least one vibration measuring device for measuring a vibration of the refiner in operation, and at least one control unit configured to adjust the blade gap between the refining elements (3, 4, 6, 7) by controlling the at least one loading device to move the at least one refining element (3, 4, 6, 7) in respect of the at least one another refining element (3, 4, 6, 7) based on the measured vibration of the refiner, wherein the at least one control unit is configured to control the at least one loading device to move the at least one refining element (3, 4, 6, 7) towards the at least one another refining element (3, 4, 6,7), to receive from the vibration measuring device a vibration measurement signal describing the measured vibration of the refiner, to compare the received vibration measurement signal to a condition (SET-V) settable for the vibration of the refiner, and to control the at least one loading device to move the at least one refining element (3, 4, 6, 7) away from the at least one another refining element (3, 4, 6, 7) in accordance with a settable distance (SET-BW) in response to the vibration measurement signal fulfilling the condition (SET-V) settable for the vibration of the refiner, characterized in that the at least one control unit is configured to control the at least one loading device to move the at least one refining element (3, 4, 6, 7) towards the at least one another refining element (3, 4, 6, 7) periodically in accordance with a settable distance (SET-FW) at a settable time interval (SET-T) after the at least one refining element (3, 4, 6, 7) has been moved away from the at least one another refining element (3, 4, 6, 7) in response to the vibration measurement signal having fulfilled the condition (SET-V) settable for the vibration of the refiner.