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AMC-AASD15A servo controller

Discussion in 'SimTools compatible interfaces' started by Thanos, Nov 6, 2019.

  1. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
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    The torque develops against a fixed point. When i said about 10mm position distance, its what the commanded distance to the servo should be if there is no obstacle. If the servo is blocked from rotating, it will instead start developing torque that is proportional of the distance command you sending to it... simple.

    I just gave the 10mm distance command as example, it may need more depending on the load that is attached on the servo before it reaches the max 300% torque.

    Also using it in combination with position command, it will guarantee the motor won't start running away if the load breaks...
  2. cfischer

    cfischer Active Member Gold Contributor

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    This is simple and works fine. Until you move the end of the actuator, like in a g helmet system when a user moves his head. It's ok, I'm over it. I just thought I would ask.
  3. cubexxx

    cubexxx Member

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    My Motion Simulator:
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    You can use parameters Pn189 and Pn190 in the aasd driver to map the arduino output (0.55-2.75) to 0 - 100% torque. No additional hardware needed. I think even -100% to +100% is achievable
    • Informative Informative x 1
  4. cfischer

    cfischer Active Member Gold Contributor

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    Now that is interesting. Thanks for the pro tip!
  5. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
    AC motor, Motion platform, 4DOF, 6DOF
    So I was sent a metal enclosure for the AMC-AASD15A to modify for the 7th servo connector and add the 3.5mm connector I use for e-stop and force offline switches... nothing that an angle cutter (dremel) and a drill cannot handle!

    Boy, this looks much better than I thought in person than on photos...





    Thanks
    Thanos
    • Like Like x 5
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  6. prodigy

    prodigy Burning revs

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    @Thanos what is this display you are using to see the EMI signal?
  7. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
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    Its a DSO211 Nano
    DSO211 NANO


    Thanks
    Thanos
    • Useful Useful x 1
  8. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
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    Hi everybody. Its time to update the firmware of your AMC-AASD15A!!

    There are other things that wanted to add, but this update was long due now so I released the most important features for now:
    -Additional functionality on E-Stop and Force Offline inputs.
    -Addition of calculations for easy use with Gearbox reduction rotary actuators.


    Download the firmware file and the bootloader utility and unzip them. You can watch this video if you haven't updated the firmware before: Firmware update procedure for AMC-AASD15A

    https://github.com/tronicgr/AMC-AASD15A-Firmware/tree/master/Latest_firmware


    Here is the list of changes for the new firmware v2.08:

    ======= enc_6dof_AMC_AASD15A_v2_08 =======
    release date: 01/22/2020:
    -Added option for KLM input (e-stop) to either HOLD powered position or Kill power to the Motors
    -Added option for FSW input (Force offline) to either Always Park or let user use park/standby button.
    -Added Actuator type selection for Linear or Rotary type (gearbox reduction). The menus are showing new options fit for describing the gearbox like reduction Ratio, Steps of the motor and output Angle range as well the CW or CCW direction of the motor.


    example calculation for gearbox:
    (500pulses / 360 ) * 180degrees = 250 Pulses
    250Pulses * (50:1 Reduction) = 12500 Pulses
    *keep in mind that the max pulses buffer that AMC-AASD15A can use is 65535!






    Thanks
    Thanos
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  9. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
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    The AMC-AASD15A will be available now with Servo7-aux connector included, on the little PCB board already soldered, ready to plug and mount on the 3D printed enclosure.

    20200124_054712_sm.jpg



    Thanks
    Thanos
    • Like Like x 1
  10. Mark Pattison

    Mark Pattison New Member

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    Can we still order just the 7th aux servo connection for those of us who don't have it yet, but would like to add it for potential growth options in the future?
  11. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
    AC motor, Motion platform, 4DOF, 6DOF
    I may add a separate product on Tindie for it assembled, but otherwise you may order the PCB made and solder a DB25 female connector and male-female 2.54mm pitch headers yourself to it:

    https://oshpark.com/shared_projects/pSGlJpx4

    Thanks
    Thanos
  12. djbart82

    djbart82 New Member

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    Donde podemos comprar la carcasa de metal?
  13. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
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    I think you said: "Where can we buy the metal case?"

    You can contact PT-Actuator for that, here:
    http://www.pt-actuator.com/index.html


    Thanks
    Thanos
  14. noorbeast

    noorbeast VR Tassie Devil Staff Member Moderator Race Director

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  15. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
    AC motor, Motion platform, 4DOF, 6DOF
    Here is the results of using the new rolling average filter on a large Closed-Loop stepper motor (Nema34). It definately inproves the quality of motion!!! Note these closed loop steppers can reach up to 3000RPM, have lots of rotor inertia and without proper acceleration-deceleration slopes, they overshoot too much !!!!!





    These closed loop stepper motors, are hybrid servo motors, meaning to be used as constant speed (pulse rate) and have NO proper PID control so they lack acceleration-deceleration properties and pulse signal smoothing. Still much more noisy in my opinion that the real servomotor solutions.


    Thanks

    Thanos
    • Winner Winner x 1
  16. Mark Pattison

    Mark Pattison New Member

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    No way... Is this similar to what ClearPath calls their "RAS" (Regressive Auto Spline)?

    If so...
    AWESOME AWESOME AWESOME SAUCE ! ! !
    • Agree Agree x 1
  17. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
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    That is exactly what it is... it corrects the S-curve response of the motor, injecting pulses in the process!
    • Winner Winner x 1
  18. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    • Like Like x 1
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    Last edited: Feb 7, 2020
  19. Thanos

    Thanos Building the Future one AC Servo at a time... or 6

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    My Motion Simulator:
    AC motor, Motion platform, 4DOF, 6DOF
    Load up with this Valentines special discount. $20 off for the AMC-AASD15A servo controller!
    Use this code on the checkout: E8477BB7


    Thanks
    Thanos


    *limited supply in stock, expect great delays after because of parts extended delivery delays after coronavirus aftermath...
  20. prodigy

    prodigy Burning revs

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    Now I can buy one for my wife ;)
    • Funny Funny x 1