WIP FFB is vibrating

Discussion in 'Technical & Support' started by Jura, Dec 18, 2022.

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  1. Mordorsport Max

    Mordorsport Max Registered

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    I am pretty sure that is a flatspot. Even if the FFB-Output is at 50Hz Samplerate. I bet if you speed up, the freq rises and its intensity.

    upload_2022-12-20_21-6-23.png
    Do you remember the 38Hz. Thats because of the max. rev's of the wheel. That bad stuff is from 17Hz up to 38Hz @ top speed.
    Take a look at you "Tyre Wear" espicially FL. Something happend to the Tyre at the end of Straight 3-4 and in Turn 4. LockedUp or maybe a Jump?!?! I think it happened in Lap3. Watch this. Your FFB, keep an eye on Straight 7-8.
    Lap3
    View attachment upload_2022-12-20_21-6-55.png

    Lap4
    View attachment upload_2022-12-20_21-7-17.png

    Also that cone shaped FFB on the Straights is a marker for a Flatspot.
     
    Mordorsport Max, Dec 20, 2022
    #41
  2. Lazza

    Lazza Registered

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    Re flatspots: turn off tyre wear and test again.
     
    Lazza, Dec 20, 2022
    #42
  3. Littlejoe1999

    Littlejoe1999 Registered

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    Zoom in on laptime 41-41.5s it shows the problem really good. 100% no flatspot. Im tgoing left and right on kemmel straight
     

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    Littlejoe1999, Dec 20, 2022
    #43
  4. Jura

    Jura Registered

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    https://we.tl/t-loQRIiTLE5
    Here is motec and replay file with tyre wear off.
     
    Jura, Dec 20, 2022
    #44
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  5. Andregee

    Andregee Registered

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    I have with my DD2 from Fanatec also sometimes very strange vibrations, mostly when I adjust something on the Steering Wheel Range or the FFB.
    It sounds like that
    https://streamable.com/24awcd

    But I also have another strange phenomenon. For example, when I drive the Porsche GT3 on Watkens Glen, which has a rough asphalt, I feel very good tyre scrubbing, because I set the smoothing ingame to 0 and in the Fanatec menu the interpolation filter to 2, which hardly filters out fine details. After a session change, the fine details are suddenly barely present and it feels like I increased the smoothing or FFB interpolation. This is totally annoying. I had the same with the Clubsportwheelbase V2, but I thought I was just imagining it.
     
    Last edited: Dec 23, 2022
    Andregee, Dec 23, 2022
    #45
  6. Jura

    Jura Registered

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    This isn't the issue im trying to describe here. But I never had such issues, but there used to be various weird issues.
     
    Jura, Dec 23, 2022
    #46
  7. davehenrie

    davehenrie Registered

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    That has been a Fanatec/rF2 issue for years. Often occurs when repeatedly entering the pits to work on setup changes, or, as you noted, from changing sessions. I don't think any brand except Fanatec suffers from this.
     
    davehenrie, Dec 23, 2022
    #47
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  8. Coutie

    Coutie Moderator Staff Member

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    Just to update you, we're aware of the issue and it's being worked on, seems to mainly effect high NM wheels, but you can probably feel it a little in most others.
     
    Coutie, Dec 23, 2022
    #48
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  9. Jura

    Jura Registered

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    Thanks for the update
     
    Jura, Dec 23, 2022
    #49
  10. delapecs

    delapecs Registered

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    Great news !! Please, make us a xmas gift. ;)
     
    delapecs, Dec 23, 2022
    #50
  11. Andregee

    Andregee Registered

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    Does this also relate to the loss of detail I described as if you increase the smoothing from 0 to about 7 and lose all the fine details like tyre scrubbing?
     
    Andregee, Dec 23, 2022
    #51
  12. Coutie

    Coutie Moderator Staff Member

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    No, I don't think so.
     
    Coutie, Dec 23, 2022
    #52
  13. Andregee

    Andregee Registered

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    That's really sad
     
    Andregee, Dec 23, 2022
    #53
  14. Mordorsport Max

    Mordorsport Max Registered

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    Good Evening and merry Christmas! Gota little cold and the family in the house. ;-)

    I took a closer look at the FFT's of the torque and the associated slew rate and noticed something unusual there. At least I think so .... I've already made a mistake with the FlatSpots. Although it really looked like it.

    I hope I can do it tomorrow, but we'll see.
     
    Mordorsport Max, Dec 23, 2022
    #54
  15. doddynco

    doddynco Registered

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    doddynco, Dec 26, 2022
    #55
  16. Jura

    Jura Registered

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    Not sure what I am looking at. I started having issues with updated that was week and a half ago. No issues prior that
     
    Jura, Dec 26, 2022
    #56
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