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Showroom FlyPT - 6DOF Brushless DIY Actuators

Discussion in 'DIY Motion Simulator Projects' started by pmvcda, Aug 29, 2017.

  1. C.Y

    C.Y New Member

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    So to confirm ... for a starter like me and who doesn't have a mechanical engineering background but understands simple mechanics / engineering .... the most feasible choice is the Thanos .. otherwise I fall into a black hole that I might not be able to get out of ?
  2. John Snell

    John Snell Member Gold Contributor

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    Hi all.

    [IMPORTANT] Read this if you are building the hardware in this thread.

    I’ve had A LOT of problems getting the ESP32 boards to work. I had 3 BLDC motors and decided to base my build on the hardware described in this thread.

    I used the PCB’s here: https://www.xsimulator.net/communit...hless-diy-actuators.10799/page-38#post-218195 and connected according to the circuit diagrams here: https://www.xsimulator.net/communit...hless-diy-actuators.10799/page-26#post-192260

    I found that one part on the ESP32 itself was always getting too hot to touch and I now realise that is probably the input voltage regulator. After a lot of time and effort, I believe I have found the reason.

    According to the circuit diagrams, the +/- connections from the hall sensor go back to the Vin/Gnd on the ESP32 itself. It may be unique to my motors but that is putting 24V from my main motor power supply on those lines, and means that I am (was) sending 24v to the Vin on the ESP32 which is rated at 12V max.

    Luckily it turns out that the hall sensor can be read just the same without those wires being connected at all.
    FLYPT Wiringv2 again.png

    Having now disconnected the +/- hall sensor wires, I got another ESP32 (my 5th attempt) and finally it all works as it should. Connects and running smoothly, without any of the craziness. I was running the motor drivers via an Arduino/SMC3 for a while but this is much smoother/quieter/better.

    Hope this is helpful information for someone.

    John
    Last edited: Oct 24, 2022
  3. Gadget999

    Gadget999 Well-Known Member

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    My Motion Simulator:
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    can you record the pwm against amps using a clamp meter - would be interesting to see the amps vs duty cycle

    the problem may be in your brushless motor driver

    (brushed motors deliver more amps and torque at low rpms vs bldc motors)
  4. Lstyle

    Lstyle New Member

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    Hi all
    I'm starting my project, I have no problems with mechanics, but with electronics everything is not as good as we would like))

    I am going to use FlyPT and ESP32
    tell me if the code from this branch will work correctly with the Nema23 stepper motor and the TB6600 driver?
  5. Lstyle

    Lstyle New Member

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    Or is it better to use arduino for these components
  6. motiondynamics

    motiondynamics Member Gold Contributor

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    Hi, congratulations on your project.
    I am passionate about flight simulation and I built a frame to mount 4 linear actuators with brushless motors.
    I decided not to use the potentiometers because they are very delicate, so I am thinking of using the VL53L0X laser sensors.
    Being an I2C communication, I suppose you have made a sketch for the conversion to analog (0-5 volts).
    I am not good at programming, so I ask you if you can share the code you have developed.
    Thank you
  7. zhai1987

    zhai1987 Member

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    Hi, flypt. I have a question. Why not make an esp32? Isn't it more convenient to handle this? Thank you
  8. loon_NG

    loon_NG New Member

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    Hi @pmvcda,
    Thank you very much for sharing your complete project.
    I was following this post and @pooh's post since almost 2 years. Now get some €€, I decide to build mine and your design retains my choice for its affordable and it seems easier for me to build the mechanical. I have some questions before order spareparts.

    1) What do you think about the motor (Nanotec DB59C024035-A) power? For me they are more than enough, i'm not a big guy;)
    2) is the motor driver ACT BLDC-8015A always good?
    3) PSU, Mean Well RSP-3000-24 is also good too?

    They are the first components I want to order quickly.

    Best

    NB: For now I play racing car and FS2020 in VR.
  9. bobo

    bobo New Member

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    hello,i want to ask some problem.
    motor=0.6N*m, so F =Tx2xPIxn/L=71.592N*m=7.3KG
    ALL F=7.3KG x6=43.8KG
    This force is not enough.
    One person should be at least 80KG, and the monitor and iron frame seat should be at least 20KG, that is, the motor can drive 100KG at least.
    But why do you watch your video? It seems that the force is OK?
  10. loon_NG

    loon_NG New Member

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    Hi you forget to divide to 0.8, the effiency of ballscrew search "back driving torque fir ballscrew" on youtube you will find the formula: T_b = F*P*eta_2/ (2*Pi).

    Bests
  11. bobo

    bobo New Member

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    I think that even if 0.8 is added, this motor should not be enough. But why does his video look good.
  12. loon_NG

    loon_NG New Member

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    sorry it was my mistake! You have to calculate the F = axial load [N/m] with: Tb=0.6 Nm, P=screw lead=0.01m and eta2=0.8 for ballsrew reverse efficiency.
    F=2*pi*Tb/P/eta2
  13. loon_NG

    loon_NG New Member

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    sorry, the unit is N for F