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IndustryArena Forum > CNC Electronics > Servo Motors / Drives > rapid acceleration for a short time.
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  1. #1

    Join Date
    Mar 2021
    Posts
    2

    rapid acceleration for a short time.

    hello

    I need rapid acceleration for a short time.
    Every 62.5 ms, the acceleration should be switched between forward and reverse directions.
    Also, the required instantaneous RPM is 400 RPM.
    In other words, every 62.5 ms, you need to switch 400 RPM forward and 400 RPM reverse.
    Is it a viable story if the capacity is sufficient?
    The inertia of the load can be reduced to test it.
    If you think it is possible, please recommend a product.

  2. #2
    Member
    Join Date
    Nov 2013
    Posts
    1921

    Re: rapid acceleration for a short time.

    Hi,
    the second of Newtons laws is 'force equals the time rate of change of momentum.'

    If you wish to reverse the momentum of an object instantaneously that would require infinite force, which is clearly impossible.
    The better way to describe the problem is that for a given momentum what force (force being analogous to torque) is required to reverse the momentum
    in a given time. Then the only question is how much elapsed time is considered good enough for your application.

    If you were to detail things like the momentum, ie mass and speed of the object to be reversed, the mechanical means of converting motor torque to
    linear acceleration, say ballscrew, or rack and pinion we might be able to do some calculations that would tell you whether its possible or more prehaps feasible at a cost.

    Craig

  3. #3
    Member
    Join Date
    Jan 2005
    Posts
    14186

    Re: rapid acceleration for a short time.

    Quote Originally Posted by kimwoo0 View Post
    hello

    I need rapid acceleration for a short time.
    Every 62.5 ms, the acceleration should be switched between forward and reverse directions.
    Also, the required instantaneous RPM is 400 RPM.
    In other words, every 62.5 ms, you need to switch 400 RPM forward and 400 RPM reverse.
    Is it a viable story if the capacity is sufficient?
    The inertia of the load can be reduced to test it.
    If you think it is possible, please recommend a product.
    AC servos can do this, you have the problem of how much torque the motor will need to overcome the inertia, so you have to know what the inertia will be and then get an AC Servo motor that can handle the inertia, here is a good video of the DMM AC servos in action with different inertia loads

    https://www.youtube.com/watch?v=fyKBKUkFJVA&t=9s
    Mactec54

  4. #4
    Banned
    Join Date
    Dec 2021
    Posts
    31

    Re: rapid acceleration for a short time.

    We produce DRO and linear scale, maybe it will help you, you can go to https://www.amazon.com/stores/HHXXOV...2?ref_=ast_bln
    view on
    Or on Whats: +8613528773691
    Contact me at szhxx2019@163.com, marchleon13528773691@gmail.com

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