Abstract: A method and a device with a control apparatus (50) for starting an electric machine (10) with a rotor (20), particularly the spinning cup of an open-end spinning machine, magnetically mounted by a bearing having permanent magnets (31, 32, 33, 34). An actuator system controls the position in the axial direction (35, 36) and two limitation bearings (41, 42), determine the axial end positions of the rotor. The actuator system brings about a lifting from the first axial end position, and a system variable during such lifting is compared with a reference value, and the rotor (20) is moved into the second end position, and the actuator system brings about a lifting from the second axial end position, and a system variable on lifting from the second end position is compared with a reference value.

Abstract: A system for activating a rotor drive (31) of an open-end rotor spinning machine (30), having an open-end rotor spinning machine (30) with a plurality of workstations (33), each having a rotor drive (31) with a control unit (4), which comprises at least one communication interface (18, 19) for connecting to a workstation control unit (35), and external means for substitute activation of the individual rotor drives (31) and for reading signals representing operating state data of the rotor drive from the individual control units (4) of the rotor drives (31) by means of at least one communication interface (18, 19) of the control units (4) for adjustment and checking purposes.

Abstract: A system for activating a rotor drive (31) of an open-end rotor spinning machine (30), having an open-end rotor spinning machine (30) with a plurality of workstations (33), each having a rotor drive (31) with a control unit (4), which comprises at least one communication interface (18, 19) for connecting to a workstation control unit (35), and external means for substitute activation of the individual rotor drives (31) and for reading signals representing operating state data of the rotor drive from the individual control units (4) of the rotor drives (31) by means of at least one communication interface (18, 19) of the control units (4) for adjustment and checking purposes.

Abstract: A method and a device with a control apparatus (50) for starting an electric machine (10) with a rotor (20), particularly the spinning cup of an open-end spinning machine, magnetically mounted by a bearing having permanent magnets (31, 32, 33, 34). An actuator system controls the position in the axial direction (35, 36) and two limitation bearings (41, 42), determine the axial end positions of the rotor. The actuator system brings about a lifting from the first axial end position, and a system variable during such lifting is compared with a reference value, and the rotor (20) is moved into the second end position, and the actuator system brings about a lifting from the second axial end position, and a system variable on lifting from the second end position is compared with a reference value.