Quad 10" not flying

Discussion in 'Build & Tune' started by Alfadex, Feb 27, 2018.

  1. Alfadex

    Alfadex Member

    i am trying 10 days to fly my first 10" quad but it is not flying, ot weight is 860 gr.
    I am using omnibus F4
    ESC HW30A
    motor EMAX 2212/980kv
    3s battery 2600mAh
    I have 3.2.5 version of Betaglight
    I have try to chang PID but nothing
    My receiver is Taranis qx7 and min and max are adjusted, propellers are also adjusted and vibration of accelerometer is only 0.02 on three axis .
    Esc are in default option but i have also play with timmings ,
    I have also notice some jigging at moter ,motor in the video even if after calibration
    https://mega.nz/#!EJIBnLhT!WabJ4TS8hrykAbMTZzquGz3p7AMiKw3Rd9_Cq5G2QoI

    And when i try to fly it all motor stop and fall down as video
    https://mega.nz/#!wUwSFSAI!4wmXvZj5TOBORP06gRl2wdHlvX6cNsCiJmhArcemaPo

    I don't know what else to check, i also incule dump file
     

    Attached Files:

  2. mozquito1

    mozquito1 Well-Known Member

    Messing with timings, not a good idea or messing with pids on a first build.
    Have you set up the Aux switches for arming switch & modes. Then I would suggest a board reset or reload the latest firmware again.
    If the auxiliary switches are not setup then it's a dead duck.
    Until you get it flying all you need to setup is setup tab, configuration tab modes tab.
    & calibrate the esc's & motors if not running Dshot. Your trying too much too soon.
     
    Gyro Doctor likes this.
  3. Alfadex

    Alfadex Member

    Hi mozquito1 , I set all esc to default setting timming cutoff threshold,startup mode... I have also asign arm switch ,and another switch for horizon acro and angle . I am palying only with angle , i mean horizon and acro is disabled. I have reset betaglight 3 times ,also i reset taranis qx7 and made all from the beginning. My esc are running only in pwm mode ,i have also calibrate those many times. For sure i have trying too much,I didn't want to , but i suppose there is a probleme maybe obvious but i am new and cannot locate.
    Do you hear this jigging at motor , is it normal , all motor with all esc do this. I have calibrate all motor together but and seperate, but nothing. 20 days ago i had no idea about rc, but now from searching about my problem i have learn too much .
     
  4. mozquito1

    mozquito1 Well-Known Member

    In the esc settings In blheli configuration tool. Is the esc pwm range 1000-2000.
     
  5. Alfadex

    Alfadex Member

    My esc is HW30A , as far as i know those have Simonk i could not connect with blheli
     
  6. RENOV8R

    RENOV8R Well-Known Member

    Even though the Omnibus has the reliable MPU6000 gyro, a big bird like that is probably producing more noise than Betaflight is expecting, as really defaults are for a smaller racing quad. If you haven't done so already, you need to soft mount your flight controller and add a low esr capacitor.

    Then I would reset your Betaflight fw back to default, enable dynamic filtering and reduce all pids by 50%.
     
  7. Alfadex

    Alfadex Member

    Hi , yes i have soft mount fc ,I also enable filter but i have not reduce pid so much, i will try . where to add esr capasitor at power supply of fc ?? esc already has an electrolitic capacitor
     
  8. RENOV8R

    RENOV8R Well-Known Member

    Yes, I always add a 1000uf 35V low esr cap to the power supply. I use the Panasonic brand
     
  9. Jackson

    Jackson USA member at large

  10. mozquito1

    mozquito1 Well-Known Member

    Or between esc & pdb. If esc have not got them on already. Most non opto esc's have capacitors. As they supply a bec.
     
  11. Alfadex

    Alfadex Member

    Hi , finally i could not find a solution for it,i have done everything, i suppose problem is with esc.My esc only suport pwm , not oneshot ,not dshot and in pwm, PID loop frequency is only 500 Hz. I have adjust filters ,pid, PT1, Dterm,gyro notch , everything there is in betaflight
    I would like to suggest me 4 seperate good esc. Motor are EMAX 22123 980KV and total weight is around 1 kilo.
    Baterry is 3s and it is 2600mAh, but i am planning to buy a higher in mialiamps. I am using F4 board. Tnxxx
     
  12. RENOV8R

    RENOV8R Well-Known Member

  13. Gyro Doctor

    Gyro Doctor Electronics Tech for over 45 years

    :eek: ... Your PID loop frequency should be like 8KHz !!!
     
  14. Alfadex

    Alfadex Member

    yes i agree , i choose 8KHz and when i reboot it is again at 0.5KHz . I think when esc support only pwm , max PID loop frequency is 0.5KHz.
     
  15. Gyro Doctor

    Gyro Doctor Electronics Tech for over 45 years

    :rolleyes: ... The LOWEST loop times for any normal PWM ESCs are still at 1KHz.
    If you can, set those ESCs for "one shot" mode so they will at least sync with the FC at it's lowest loop time.
    There's sooooo much delay between the perceived (by the FC) corrections needed and the implimentation
    of those corrections (by the ESCs) that the quad will be too unstable to fly.
     
    mozquito1 likes this.
  16. Alfadex

    Alfadex Member

    Hi ,indeed 0.5KHz for pid is very low but i am on a good way. I update my esc to SimonK firmware and now i can select oneshot125 but not oneshot42 . So, i set gyro frequency to 4KHz and PID frequency to 2KHz . It is stable enough at headfree mode but not in angle mode .
    When i set angle mode that is for a newbie like me, it is not stable and as i can understand it is unstable in roll axis. I have upload a video to watch how unstable it is. What do you think should i change
    https://mega.nz/#!lAQ1STiC!SlpOEGIdF1Az7B97BCGPFA-H0D8NXB-YgPMYhd-X1IU
     
  17. mozquito1

    mozquito1 Well-Known Member

    Seriously pwm esc's, are they even blheli.
    Get yourself some opto.
    I buy cheap £6.75 pocket rocket & they are nails. Littlebee 20amp also.
    Or any of the dys will be better than what you currently have.
     
    Last edited: Apr 9, 2018
  18. Alfadex

    Alfadex Member

    ok you prevail me. what do you think about it

    https://www.banggood.com/4-PCS-Race...-p-1101000.html?rmmds=search&cur_warehouse=CN

    I finally bought 5 of those

    https://www.banggood.com/Racerstar-...t-for-FPV-Racing-p-1063907.html?rmmds=myorder

    Let's see if it finally fly bacause i am trying in searching about all those stuff.
    I am trying it about 3 month now and i have spent around 400 euros. I have not astimate it could rise so much money. If i knew it , i would definitely buy a Xiaomi mi drone for those money.
    But the only benefit building a drone, is that i could use taranis transmitter for an airplane or for a rc car or something else,or spare parts can be used for anohter drone, the other hand mi drone is standar setup that cannot be modified
     
    Last edited: Apr 9, 2018
  19. mozquito1

    mozquito1 Well-Known Member

    You should or could have 2 quads for that price. Here is my list for a bog standard build I do for ppl.

    Frame £20
    Esc's £28
    Pdb £5
    Fcb £20
    Motors rjx hobby £37
    Vtx TBS unify nano. £25
    Antenna upto £20

    Then another £15 for each rx I need.
    Even if I throw emax on its less than £200
     
  20. Alfadex

    Alfadex Member

    Yes but you didn't estimate transmitter-rec.

    taranis qx7 100$
    x4r-sb 30 $
    run cam split mini 85$
    f4 board 30$
    4x esc 25$
    4x motors 50$
    12x props. 25$
    Eachine RC832 Boscam FPV + Eachine TX526 5.8G 40CH 25MW/200MW/600MW 30$
    5x 18650 battery 25$
    dipslay 4 '' 10$

    You may transm-receive , i didn't had anything i start for 0.
     

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