10v control mode. Gap around 0v


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Thread: 10v control mode. Gap around 0v

  1. #1
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    Default 10v control mode. Gap around 0v

    Hello.

    Preconditions:

    I have a not good AASD-30 servodriver. He is connected to kflop + kanalog.
    In +-10v control mode after power enabling and clicking to Init button the servomotor jerks.
    First video.


    Timeline:
    3s - init
    8s - stop
    13s - init
    25s - stop
    29s - rotation
    31s - rotation
    42s - rotation
    43s - stop

    Right after turning on the power the engine does a jerk for a second, after that it is not on hold (makes a small rotation around zero position)


    The only one way to hold servo motor is to set Pn161 and Pn162 settings to 20 and -20 respectively.
    Screen from documentation

    AASD-30 doc

    But after this settings the servo motor sounds like he dies after I started the program.
    Second video.


    If 10v wires doesn't connected to the one servodriver the servomotor rotates at a speed of about 50 rpm. When they doesn't connected to second servodriver the servomotor rotates with speed about 22 rpm. Speed ??can vary due to incomprehensible reasons.


    Question:

    I want to know how to set gap around 0v.
    Range -8v to -0.2v, 0.2v to 8v instead of range -10v to 10v

    If it is not possible, could it be fixed in some another way?

    Thanks.



  2. #2
    Gold Member TomKerekes's Avatar
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    Default Re: 10v control mode. Gap around 0v

    Hi Brodjaga,


    Sorry I don't really understand the issue.

    Are you concerned about analog offsets and drift? That shouldn't be a problem once the servo is enabled. Have you tuned/tested your Axes? Adding deadband into the servodriver is probably a bad idea.

    You might read this wiki article.

    Regards

    TK
    http://dynomotion.com


  3. #3
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    Default

    Tha problem was that the engine made small movements around 0 position when movement signals were not sent (kflop was connected and "initialized").

    The problem was solved by fixing ground connection for all components.



    Thanks.



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10v control mode. Gap around 0v

10v control mode. Gap around 0v