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Thread: What is the difference between a linear servo and a solenoid?

  1. What is the difference between a linear servo and a solenoid?

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  2. #2
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    Re: What is the difference between a linear servo and a solenoid?

    A solenoid uses an electromagnet to pull a metal plunger...= All or nothing...some are spring loaded, others use two magnets to push and pull.

    A linear servo uses a threaded "worm" gear to extend or retract...with varying degrees...

    Hope this helps.

  3. #3

    Re: What is the difference between a linear servo and a solenoid?

    A solenoid is more like digital, either "on" or "off", thrust or retract. A linear servo is more analog, many different positions that can be selected through adequate signalling.

    Now of course there can be some overlap between the 2, where a solenoid with spring can be PWMed to a certain position, but a linear servo is probably more accurate in positioning.

    Mechanically, a solenoid is a ferrous piece of material acted upon by a coil producing a magnetic field, moving it from a spring held position to a state of rest between the spring and applied field. Linear servos are typically lead screws driven by motors with position measured by potentiometers or encoders and limit switches.

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