Abstract : The control accuracy of a high-precision gyro drift servo turntable with a precision ring servo system and air static pressure bearings is affected by the hysteresis torque of the air bearings, eddy current torque, static unbalance torque caused by improper shaft mass configuration, and the interference torque of the slip ring servo system on the spindle. This paper, through theoretical analysis and experimental research, concludes that when the spindle system is placed perpendicular to the ground, the main interference torque originates from the slip ring servo system. Based on various verifications and processing of experimental data, the paper presents mathematical expressions for the constant spindle value and random interference torque, providing an effective way to further improve the servo accuracy of similar servo turntables. Keywords : Servo turntable, precision ring servo system, random interference 1 Introduction In a high-precision gyro drift test turntable with a slip ring servo system and air static pressure bearings, the main factor affecting the turntable's control accuracy is the interference torque of the spindle system. To improve the turntable's control accuracy, it is necessary to conduct necessary analysis and experimental research on these factors, identify their patterns, and take effective measures to overcome or compensate for them. 2. Analysis and Experimental Study of Spindle Interference Torque Figure 3 shows the structure of a high-precision gyroscope drift test turntable with a slip ring servo system and air hydrostatic bearings. During testing, the interference torque generated on the spindle includes the static imbalance torque caused by improper mass distribution of the spindle system, the interference torque caused by the slip ring servo system, and the viscous torque and eddy current torque of the air bearing. The viscous torque of the air bearing refers to the friction torque within the fluid bearing the pressure film. For the gyroscope drift test turntable, under normal circumstances, changes in the bearing film thickness have little effect on the radial bearing viscous torque. For thrust bearings, even with minimal bearing size, the viscous torque will be very small. [b][align=center]For more details, please click: Experimental Study on Spindle Interference Torque of Turntable with Servo Slip Ring and Air Hydrostatic Bearing[/align][/b]