Types of Motion Control System | Motion Control system in delhi

PreciMotion
3 min readMar 2, 2021

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Motion Control Systems: Motion control systems are any system that controls one or more of the following of a machine: its position, velocity, force, and/or pressure. Precimotion is your one stop shop for Motion Control system in delhi. We have specialized in the design, development, installation and support for our service products such as gearbox, robots, AGV etc. Motion Control system in delhi

They generally consist of the follow components:

  • Motion controller: The central part which operates the system (I.e. the brain).
  • Drive: Receives the low voltage command signals and then sends the necessary voltage and current to the motor.
  • Motor: Converts the electrical energy into mechanical energy to power the system.
  • Feedback device: Sends the feedback to the motion controller to make necessary adjustments.

There are two different types of motion control systems: open loop and the closed loop systems. The basic difference between the two is that open loop systems do not use feedback while closed systems do use feedback. You can read more about the differences between open and the closed loop systems here.

Motion Controllers: As the brains of motion control systems, the motion controllers calculate and generate the commands that guide the trajectory and velocity of the machine. They output these commands to the rest of the system and if they receive feedback, they adjust their commands to meet the necessary requirements of the system. Motion controllers use multiple algorithms (interpolators, control loops or step generators) to calculate the precise movements of the machine based on each segment or set point.

Drives: The drives receive commands from motion controllers in the form of low voltage signals. They use these signals to convey to the rest of the motion control system the amount of high-power current and voltage needed. There are many different types of drives that can be used:

  • Digital drives: Contain the processing capabilities.
  • Analog drives: Do not contain the processing capabilities.
  • Linear drives: Quiet, low-efficiency drives used for the low power applications.
  • Switching drives: Noisy, high-efficiency drives that use the Pulse Width Modulation to switch voltage on and off.
  • Stepper or Microstepping drives: High resolution, low to mid-level torque drives that produce the smooth rotation over wide speed ranges.
  • Servo drives: Convert the low-level analog command signals to high power current and voltage. They produce torque and use internal feedback loops to precisely control current.

Motors: Motors power the motion control system by converting the electrical energy into mechanical energy. There are many different types of motors:

  • DC Motors: Also known as a brushed or the brush type motors. They use carbon brushes and a mechanical communicator to achieve the torque. DC motors will continuously operate if they receive a constant source of DC power. They require simpler drives that are high maintenance and are generally larger than a brushless motor.
  • Brushless Servo Motors: as their name implies, the brushless motors do not use brushes. Instead, they achieve rotation through the electrical communication from the drive. They have high acceleration and torque and require little maintenance.
  • Linear Servo Motors: Linear motors use linear, rather than the rotary, motion. Electromagnetic forces produce the thrust and eliminate the need for rotary to linear conversion. They are fast, precise, and responsive, have zero backlashes and are maintenance free. They also require a higher bandwidth and a larger footprint.
  • Stepper Motors: DC motors that have multiple coils which are organized in phases. Each phase is energized in a sequence, rotating the motor one step at a time. They move in precise, repeatable steps that allow for precise positioning, speed control, and the low speed torque.

Feedback Devices: Only used in closed loop systems, the feedback sensors provide feedback that motion controllers use to make necessary adjustments to the system, ensuring that the proper commands are given at all times. The most popular feedback device is an encoder (linear or rotary), which is an electromagnetic device that provides the information on position, velocity and direction. There are also absolute encoders, which directly track the positions using many unique values (serial, voltage, binary count, etc.).

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