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3.2 Servo Drives 1 2 4 3 7 6 5 13 11 12 8 9 10 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. Outer gimbal frame (y-axis control) Inner gimbal frame (x-axis control) Motor (x-axis) Motor (y-axis) Servo drive (x-axis) Servo drive (y-axis) PLC with I/O and EtherCAT Router Control panel Inclinometer 24 VDC PSU Contactors for motor supply current 12 VDC PSU Figure 3.2 The labyrinth system 23