| 摘要 |
A process and device for positioning a part are proposed. The positioning device contains an electric motor (10) connected through a coupling (11) with the part (12) to be positioned and with a position actual value indicator (13). The motor (10) can be connected via a motor driving circuit (20) to an energy source in function of the driver drive signals (23, 24) produced by a control circuit (31). The control circuit (31) has at least one control input (33, 34) to which a cut-off signal for the driver (20) or the motor (10) can be applied. The cut-off signal is produced by at least one comparing element (43, 44) in function of the position actual value given by the position actual value indicator (13). Preferably two thresholds (46, 47) are given which correspond to the mechanical limit stops (14, 15) of the part (12) to be positioned. A delay (48, 49) between attainment of the limit stop (14, 15) and the cut-off signal ensures that the part to be positioned is pressed against the limit stop (14, 15) with a given compressive force. |
