Multi-Loop Angle Position Control-Supports Angle Position Control In Both Positive And Negative Directions Up To 7 Loops Under The Default Precision Setting, But The Number Of Loops Will Not Be Saved In Case Of Power Loss. UART Serial Bus Control-Up To 253 Serial Bus Servos Controlling At The Same Time, With Simple Wiring, Reducing The Occupation Of The Serial Port Servo Aluminium Robotique Waveshare 30 Kg.cm ST3235 Serial Bus Servo, High Precision Servo Moteur Bus Série UART Cm Torque On 12V Voltage, Suitable For Building Quadruped Robots, Hexapod Walkers, Robotic Arms And Other Robotic Projects Requiring Multiple Servos. Waveshare 20 kg.Cm Bus Servo Motor, 106PRM High Speed, Large Torque Adopts 12-bit high-precision magnetic encoding angle sensor. Compared with the carbon film potentiometer, the angle of the magnetic encoder is enlarged to 360°, and the resolution is increased by 4 times Easy To Install And Debug Acceleration Start-Stop Function-The Speed And Acceleration Values Are Settable To Make The Motion Effect Softer And Reduce Impact From Inertia. Closed-Loop Feedback With Real-Time Protection-The Servo Will Provide Various Feedback Like Position, Load, Speed, Input Voltage, Current And Temperature In Real Time, With Unloading Force Protection When The Servo Is Overheated Or Overloaded. Compared with the carbon film potentiometer, the angle of the magnetic encoder is enlarged to 360°, and the resolution is increased by 4 times. One Button To Calibrate The Middle Position-360° Installation At Any Position, One Button To Set The Current Position As Middle Position. Aluminum Alloy Case & CNC Processing-To Improve The Heat Tolerance, Size Stability, Rigidity, And Mechanical Performance Of The Case, And Increase Rotational Accuracy.