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SMC3 / Sim tool problem

Discussion in 'DIY Motion Simulator Building Q&A / FAQ' started by baykah, May 14, 2017.

  1. baykah

    baykah Active Member

    Joined:
    Sep 1, 2016
    Messages:
    137
    Location:
    Toulouse - France
    Balance:
    414Coins
    Ratings:
    +132 / 0 / -0
    My Motion Simulator:
    6DOF
    Hello,

    On my 6DOF rig I have a strange behavior

    Setup is sabertooth 2x32 + SMC3

    When using SMC3 windows software every actuator work great

    When in sim tool, when I test each axis alone 1 + 3 + 5 work great and 2 + 4 + 6 don't go smooth, they move by step

    In sim tool I use the standart configuration ...

    [​IMG]

    But I wrote

    Arduino 1 (actuator 1&2)
    [A<Axis1a>][B<Axis2a>][C<Axis3a>]
    Arduino 2 (actuator 3&4)
    [A<Axis3a>][B<Axis4a>][C<Axis3a>]
    Arduino 3 (actuator 5&6)
    [A<Axis5a>][B<Axis6a>][C<Axis3a>]

    When using comm baud 115200 (change also in the arduino sketch SMC3) the problem seems to go away ...

    Any thought ?
    baykah, May 14, 2017
    #1
  2. insanegr

    insanegr !N$@n€

    Joined:
    Jan 14, 2014
    Messages:
    505
    Location:
    Athens
    Balance:
    16,715Coins
    Ratings:
    +499 / 1 / -0
    My Motion Simulator:
    2DOF, DC motor, Arduino
    you are using two motors per interface. delete the 3rd axis in each interface
    insanegr, May 14, 2017
    #2
  3. SilentChill

    SilentChill Problem Maker

    Joined:
    Jul 19, 2014
    Messages:
    2,619
    Occupation:
    Railway Maintenance
    Location:
    Morecambe, Lancashire, England
    Balance:
    20,399Coins
    Ratings:
    +3,480 / 34 / -0
    My Motion Simulator:
    DC motor, Arduino, Motion platform, 6DOF

    I had the exact same problem. You should be running interface output at 1ms and like @insanegr said delete the axis3.

    In SMC3 try changing your FPID to 4 for all actuators and see if that helps.
    SilentChill, May 14, 2017
    #3
  4. baykah

    baykah Active Member

    Joined:
    Sep 1, 2016
    Messages:
    137
    Location:
    Toulouse - France
    Balance:
    414Coins
    Ratings:
    +132 / 0 / -0
    My Motion Simulator:
    6DOF
    ok i'll try, thanks guys
    baykah, May 14, 2017
    #4
  5. baykah

    baykah Active Member

    Joined:
    Sep 1, 2016
    Messages:
    137
    Location:
    Toulouse - France
    Balance:
    414Coins
    Ratings:
    +132 / 0 / -0
    My Motion Simulator:
    6DOF
    Yeah ! did change to 1ms and fpid4 and this is great !!

    Thanks guys !!

    I need to take some pic now and update my thread :D
    • Like Like x 2
    baykah, May 14, 2017
    #5