Motion profile generator.


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  1. #1
    Join Date
    Jul 2003
    Location
    Colorado Springs
    Posts
    4,959


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    Default Re: Motion profile generator.

    Yeah, I guess you could call that a bug.
    I wasn't planning on such long low speed moves.

    I can probably fix it, but it doesn't sound like this is really what you want.
    If it has to use Longs, and needs to run faster ... the time it takes my approach to process each step will never meet your requirements.

    Maybe a different approach is in order.
    But I don't know what that would be.

    Sorry.
    DT

  2. #2
    Join Date
    Oct 2005
    Location
    Sweden
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    3,627


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    Default Re: Motion profile generator.

    Hi Darrel,
    Now I feel really bad.
    It's not that it doesn't do what I want. It does exactly what I want just not under all conditions. Conditions which are a given for me but definitely not for you and now you've wasted a lot of time on something just because I didn't manage to explain the application in enough detail. I'm the one who should say I'm sorry.

    I keep finding articles and application notes on acceleration profiles and positioning but they all seam to targeting step motor application where you obviously move the motor only one step per "tick" so you can easily "hit" the exact centerpoint and deceleration point of the move. Not so here....

    I will keep dwelling on this and trying a couple of things. I keep thinking that perhaps I could live with the acceleration constraint being violated (to some extent) on deceleration, what I can not accept is not overshooting the target.

    Thanks!
    /Henrik.

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