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Ffb damper and it's effects?

Discussion in 'Chit Chat Room' started by tommi karsikas, Oct 16, 2015.

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  1. tommi karsikas

    tommi karsikas Alien

    There is a lot of confusion based on experiences (which are obviously subjective) what does Damper value actually does in Assetto Corsa post 1.3?

    Values in assetto_corsa.ini that are affected by damper value from drivers are:
    DAMPER_MIN_LEVEL=0.0
    DAMPER_GAIN=1.0 ; Set to 0 for Logitech g920

    [LOW_SPEED_FF]
    SPEED_KMH=3 ; Under this speed the reduction will start
    MIN_VALUE=0.01 ; The FF multiplier for 0kmh.

    As far as my own experiments has let me understand the forementioned values, damper_min_level is to set how much of the damper_gain value is in use all the time.
    Damper_gain value effects also the low_speed_FF, which is set by min_value as a multiplier, and the speed_kmh determines how high speed does this damper reaches, till it disappears.

    The question here is, what are the actual effects of these values concering Force Feedback, and is there any dampening effect beyond 3 kilometers per hour, at these default values?

    Factual knowledge is needed here, so measured values or if a dev could clarify this situation, that would be the bees knees, and we all could get on with our lives. :)
     
    tommi karsikas, Oct 16, 2015
    #1
    Alexandr66 likes this.

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  2. Andrew_WOT

    Andrew_WOT Alien

    Great question, still no definite answer as it seems.
    Bumping up.
     
    Andrew_WOT, Jan 15, 2016
    #2
  3. liakjim

    liakjim Alien

    As i understood from @Lord Kunos' streams :

    DAMPER_MIN_LEVEL=0.0
    DAMPER_GAIN=1.0
    This is when car is stationary. As it starts rolling , damping starts to drop linearly to zero (when car reaches 40klm i think). This is to simulate the heavy steer while stationary.
    So if you put 0.2 , then when stationary you will get 20% damping multiplied with DAMPER_GAIN.

    [LOW_SPEED_FF]
    SPEED_KMH=3 ; Under this speed the reduction will start
    MIN_VALUE=0.01 ; The FF multiplier for 0kmh.
    I don't know what are these for.

    I hope Stefano will clear this up.
     
    liakjim, Jan 15, 2016
    #3
  4. stefanoCasillo

    stefanoCasillo Alien

    Let's start with the Damper. This is a DX effect that tends to slow down the wheel rotation.. the faster the wheel is rotating the more opposite force is added.
    The implementation is left to the driver/hardware.. so there isn't much control over it. In AC it is currently used to simulate the "stiff" wheel when the car is not moving.
    DAMPER_GAIN sets how strong this damper effect is... the reason it is there is because some wheel (that will go unnamed :p) screw up the damper implementation and vibrate like crazy when the car is not moving.. so I had to had this value to allow to turn the damper off, or reduce the effect.

    DAMPER_MIN_LEVEL is the amount of damper that is left on while driving. In other words, as the car is speeding up the amount of damper goes from DAMPER_GAIN to DAMPER_MIN_LEVEL. The reason why it is here is because some wheels are mechanically very "loose" and smooth and some users missed the old "FF DAMP" value that we had in AC in previous versions.

    The LOW_SPEED_FF stuff is totally unrelated. It kills the forces coming from the tyres at low speed to avoid unnatural vibration when the car is about to stop or starting.. because it works at super low speed (3kmh by default) I really don't see any reason to mess up with this one at all.
     
    stefanoCasillo, Jan 15, 2016
    #4
    uff_, Tibalotte, Cote Dazur and 15 others like this.
  5. liakjim

    liakjim Alien

    Thanks Stefano.

    Another think : the user has to also to add damping to wheel's profiler? Or AC will work like this even with profiler closed or with damping at 0%???
     
    liakjim, Jan 15, 2016
    #5
  6. stefanoCasillo

    stefanoCasillo Alien

    Yes the profiler setting is a multiplier for the stuff set in AC.
     
    stefanoCasillo, Jan 15, 2016
    #6
    Easy likes this.
  7. liakjim

    liakjim Alien

    So why you said that you play with logitech profiler closed? ( or my memory start to slip away? ).
     
    liakjim, Jan 15, 2016
    #7
  8. stefanoCasillo

    stefanoCasillo Alien

    ?
    I don't.
     
    stefanoCasillo, Jan 15, 2016
    #8
  9. liakjim

    liakjim Alien

    Ok sorry. Good to know. I had something wrong in my head. Thanks for clarifying.

    So since you have a G27, what are your settings?
     
    liakjim, Jan 15, 2016
    #9
  10. stefanoCasillo

    stefanoCasillo Alien

    all at 100% :)
     
    stefanoCasillo, Jan 15, 2016
    #10
    liakjim likes this.
  11. Quffy

    Quffy Alien

    I don't use damping effect because it makes the wheel feel like grinding against metal. It could be smoothed maybe, to feel more the hard stationary rubber of the tyre against the asphalt, because currently I only feel the G27's internal hardware grinding. With the soft lock is also too rough when you hit the steering lock limit.
     
    Quffy, Jan 15, 2016
    #11
  12. WallyM

    WallyM Alien

    It's always great to have definitive explanations of these kinds of settings.
     
    WallyM, Jan 15, 2016
    #12
  13. Lowkey

    Lowkey Racer

    Having dampening on 100% in Thrustmaster profiler with other things turned down off in AC definitely makes a difference, I learned this the hard way :p
     
    Lowkey, Jan 15, 2016
    #13
  14. Andrew_WOT

    Andrew_WOT Alien

    Super, thanks Stefano!
    What is the range of DAMPER_MIN_LEVEL 0 to 1 or 0 to 100?
     
    Andrew_WOT, Jan 15, 2016
    #14
  15. liakjim

    liakjim Alien

    0 to 1.
     
    liakjim, Jan 15, 2016
    #15
  16. tommi karsikas

    tommi karsikas Alien

    Thank you @Lord Kunos ,this clarifies damper effects completely.
     
    tommi karsikas, Jan 15, 2016
    #16
  17. Silhuette

    Silhuette Gamer

    Anyone with G27 have a suggestion how to get rid of dead center. Some cars are better then the others. Maybe with damper effects ?
     
    Silhuette, Jan 16, 2016
    #17
  18. Michael Hornbuckle

    Michael Hornbuckle Alien

    Sell it and get a Thrustmaster or Fanatic. :D
     
    Michael Hornbuckle, Jan 16, 2016
    #18
  19. Andrew_WOT

    Andrew_WOT Alien

    See how money change people :)
    https://www.assettocorsa.net/forum/i...leife-ac-vs-iracing.29017/page-17#post-598806

    And it's Fanatec.
     
    Andrew_WOT, Jan 16, 2016
    #19
    LeDude83 likes this.
  20. Michael Hornbuckle

    Michael Hornbuckle Alien

    You can enjoy AC all day long with a G27 or DFGT; but you will have to learn to live with a tiny deadzone in the center to do it.
     
    Michael Hornbuckle, Jan 16, 2016
    #20
    irfan.pratama likes this.
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