一种用于通过一个步进电机来驱动的致动元件装置进行说明。 根据本发明，它允许该步进电机在相反的电驱动器作为编码器相继续以这样的方式，所述电控制下一次检测到的在无电流的变化其定位以驱动与其电路连接 - 例如通过将致动元件可旋转与马达转子或非正耦合的手动操作 - 不断被进一步更新，使得控制电子设备是在任何情况下总是了解当前位置从该步进电机是对电到一个新的位置控制。 该设备不仅允许保存受到磨损闭锁装置。 它还允许甚至自动回报 在其先前的起始位置的致动元件，当它已被从该移位通过Femdeinwirkung从外部或调整。 该装置可被操作以作为加热或空调系统中有操作或结合在车辆中调节元件是特别有利的操作元件具有（手动地）连接作用的致动器，并在这方面。

A device for driving an actuating element by means of a stepping motor will be described. According to the invention it permits the stepping motor in conjunction with its circuitry in phases reversed electrical actuation weiterzubetreiben as an encoder such that the under electrical control recently acquired positioning at currentless change the same - for example by manual operation of rotating the motor rotor or force-coupled control element - will continue to be updated constantly, so that the control electronics is in any case always informed about the current position, from which the stepping motor is out electrically to drive into a new position. The device not only allows saving of subject to wear latching means. It also allows even the automatic recirculation as an actuating element in its previous starting position when it has been out of this displaced or shifted by Femdeinwirkung externally. The device can acting actuator are operated in conjunction with an as (manual) control element of the heating or air conditioning in conjunction with an operator or adjustment in a vehicle, and in this respect, particularly advantageous.