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The MG995 is a high-torque servo motor similar to the MG996R, known for its robustness and reliability in various applications. It is frequently used in robotics, automation, and remote-controlled (RC) vehicles where precise control and strong performance are required.

MG995 Servo Motor Overview

1. Key Features:

• Torque:

  • Torque Specifications:
    • At 4.8V: Approximately 9.4 kg·cm (130 oz·in)
    • At 6.0V: Approximately 11.0 kg·cm (152 oz·in)
  • High Torque: Suitable for demanding applications that require significant force, such as robotic arms or RC steering mechanisms.

• Speed:

  • Speed Specifications:
    • At 4.8V: Approximately 0.20 sec/60°
    • At 6.0V: Approximately 0.17 sec/60°
  • Speed Performance: Provides quick response times, allowing for precise control and fast movements.

• Control:

  • Type: Analog servo motor
  • Control Signal: Receives Pulse Width Modulation (PWM) signals for position control.
  • Position Range: Typically provides a range of 180°, with 90° being the center position.

• Build:

  • Gears: Metal gear construction for increased strength and durability.
  • Motor Type: DC motor with a built-in potentiometer for position feedback.

• Size:

  • Dimensions: Approximately 40.7 mm x 19.7 mm x 42.9 mm (1.6 in x 0.8 in x 1.7 in)
  • Weight: Around 55 grams (1.9 ounces)

• Power Supply:

  • Voltage Range: Operates between 4.8V and 6.0V DC.
  • Current Consumption: Current draw can be significant under load, which should be considered in the power supply design.

2. Working Principle:

• PWM Control:

  • The MG995 servo motor operates using PWM signals to determine the position of the servo horn. The width of the PWM pulse controls the servo’s angle.

• Feedback Mechanism:

  • The internal potentiometer measures the position of the output shaft and helps the servo adjust to match the control signal accurately.

• Movement:

  • By interpreting the PWM signal, the servo adjusts its position. For instance, a PWM pulse width of 1.5ms typically centers the servo, while shorter or longer pulses move it to the extremes of its range.

3. Pin Configuration:

The MG995 typically has three pins:

1. Power (+):

   • Connects to the positive terminal of the power supply (4.8V to 6.0V DC).

2. Ground (-):

   • Connects to the ground terminal of the power supply.

3. Signal (PWM):

   • Receives PWM control signals from a microcontroller or servo controller.

4. Applications:

• Robotics:

  • Commonly used in robotic arms, legs, and other moving parts where high torque and precise control are required.

• Remote-Controlled Vehicles:

  • Used in RC cars, boats, and aircraft for steering and control surfaces.

• Automation Systems:

  • Employed in automation systems where strong, reliable actuation is needed.

• Model Making:

  • Utilized in hobbyist models and simulations requiring precise movement of parts.

5. Advantages:

• High Torque:

  • Provides substantial force, making it suitable for heavy-duty applications.

• Durability:

  • Metal gear construction enhances durability and reduces wear.

• Precise Control:

  • Offers accurate control over position, making it ideal for applications requiring fine adjustments.

• Cost-Effective:

  • Balances performance and cost, making it accessible for both hobbyists and professionals.

6. Limitations:

• Power Consumption:

  • Higher current draw, particularly under load, which may require a robust power supply.

• Size and Weight:

  • Larger and heavier than some other servos, which could be a consideration in space-constrained applications.

• Noise:

  • May produce noise during operation, especially under high torque loads.

Example Use Case:

Robotic Arm:

• In a robotic arm, the MG995 servo motor can be used to control joints and grippers. Its high torque enables it to handle substantial loads and provide precise movements necessary for complex tasks.

Summary:

The MG995 servo motor is a reliable and high-torque servo that is suitable for a range of applications where strength and precision are important. With its metal gears, high torque, and robust performance, it is a popular choice for robotics, RC vehicles, and automation tasks.