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Servo motors (Types of Servo Motors (Advantages Of Servo Motors Over…
Servo motors
Servo motor is a type of motors whose output shaft can be moved to a specific angular position by sending it a coded signal. The servo motor will maintain the position of the shaft as long as you keep applying the coded signal. When you change the coded signal, the angular position of the shaft will change.
Positioning servomechanisms were first used in military fire-control and marine navigation equipment. Today servomechanisms are used in automatic machine tools, satellite-tracking antennas, remote control airplanes, automatic navigation systems on boats and planes, and antiaircraft-gun control systems
Types of Servo Motors
Servo MotorStandard servo motors have three wires, which are for power ( 4 – 6 V), ground and control. The size and shape of the servo motors are dependent on the application. RC servo motor are the common type of servo motors used in robotics and hobby applications due to their affordability, reliability, and simplicity of control by microprocessors.
RC servo motors are low power servos that can be powered from small batteries and other DC supplies in the range of 100 mA to 2 A. There are also high power servo motor types which are powered from AC supplies and used in industrial applications.
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Operating Speed :
Operating speed of a servo motor is defined as the time required for the shaft to reach a specified position. Common servos have operating speeds in the range of 0,05 to 0,2 s/60 degree.
Torque :
Typical values of torques of servo motors are in the range of 0,5 to 10 kg/cm.
Control Pulse :
Control pulse is referred to the type of pulse used to position the shaft. Two main types of control pulses used in RC applications: center position in 1-2 ms and 1,25-1,75 ms.
Resolution :
It defines the precision with which the shaft is positioned when it receives an external command signal. Typical servo motors have resolutions in the range from 1 degree to 10 degree.
Size and Weight :
This characteristic is important in the mechanic design of projects. Typical RC servo motors have a weight range between 15 and 200g.
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Francisco Javier Alba Viramontes, Emanuel Alba Viramontes, Martha Daniela Landín Camarillo, Gonzalo Alexis Beltrán Reyes, Luis Felipe Esparza Magallanes.