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Question Whats wrong with my setting SMC3

Discussion in 'Ready, set, go - Start your engines' started by Arta Yasa, Feb 8, 2023.

  1. Arta Yasa

    Arta Yasa Member

    Joined:
    Jan 27, 2021
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    My Motion Simulator:
    2DOF
    Hi i set smc 3 like this.
    [​IMG]
    And my set up like this.
    [​IMG]

    And i run sine or everything on smc3 utility, but when i hold the motion the motor will off, like the motor not have full power.
    And smc 3 is like this.
    [​IMG]
    I used pararel of bts, and 24v 13A PSU.
    Mybe somebody can help me. Thank you

    Attached Files:

  2. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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    My Motion Simulator:
    3DOF, DC motor, JRK
    Kp seems to me a bit high, as does PWMmax and PWMrev, while Max Limits and Clip Input seem pretty low, with a bunch of other settings seemingly questionable, given those parameters.

    Much and all that I appreciate it is a pain, may I suggest starting from scratch, following the SMC3 setup steps exactly, so there is a known base for the likes of PWMmax (when movement starts), then members may be able to make further recommendations working from that known base:
    1. Disconnect the motor power supply
    2. Make sure Simtools is not running – we’re not ready for that yet!
    3. Wire up the Arduino (with SMC3 installed) to your H-Bridges and connect to your computer via USB
    4. Run the Windows SMC3 Utility software and make sure it communicates with the Arduino (There is no need to set baud rates, they are not configurable)
    5. Set the Kp, Ki, Kd, PWMmin, PWMmax, PWMrev to 0 for ALL motors (This will make sure the motors don’t move)
    6. Set Clip to 255 (you need to do this first) and Limit to 255 (This will give you plenty of margin if something goes wrong while setting up)
    7. Turn on the power to your motors – nothing should move at this stage!
    8. Set Kp to about 400
    9. Now slowly, increase PWMmax… at some point the motor should start to move. When it does check the “Green” feedback line is moving toward the “Blue” target position.
      • If it is then that motor and feedback is wired correctly - proceed to test other motors.
      • If it is moving away turn off motor power immediately (or quickly reduce PWMmax again). In this case you need to either reverse the wires to the motor being tested –OR– reverse the +5V and GND wires to your feedback pot for the motor being tested (do not do both). Restart the test from the beginning.
    10. Do the above for each motor
    • Like Like x 1
  3. Arta Yasa

    Arta Yasa Member

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    2DOF
    I will try again sir,
    • Like Like x 1
  4. Allwin Joseph

    Allwin Joseph ajstan

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    My Motion Simulator:
    2DOF, DC motor, Arduino
    did you check your potentiometer? the green line is the feedback, and it doesnt look how it should look, try swapping the motor polarity.
    • Like Like x 1
  5. Arta Yasa

    Arta Yasa Member

    Joined:
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    My Motion Simulator:
    2DOF
    I think its correct the feedback going to targer, but i think because my motor is 300rpm, so too fast and low torque, for now i buy the gearbox for get rpm around 60 until 80rpm.