Method for determining the position of a barrier in a barrier-shaft drive and barrier-shaft drive

摘要

The invention relates to a method for determining the position of a turnpike in a barrier-shaft drive, which has a, in particular motor, driven spindle (3) and a barrier-shaft drive for performing the method. To make limit switches and other mechanical wear elements dispensable, it is provided that the number of revolutions of the spindle (3) and / or its rotational angle is measured without contact, wherein a first rotational speed and / or a first rotational angle of a lower, closed position (8) of the turnpike and a second number of revolutions and / or a second angle of rotation correspond to an upper, open position (9) of the turnpike.