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  #19  
Old January 16th 12, 01:53 PM posted to rec.autos.simulators
Mario Petrinovic
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Posts: 253
Default How to balance FFB

Mario Petrinovic:
> Mario Petrinovic:
>> Mario Petrinovic:
>>> Mario Petrinovic:
>>>> Mario Petrinovic:
>>>>>Mario Petrinovic:
>>>>>> FolkGT:
>>>>>>>Mario Petrinovic:
>>>>>>>>FolkGT:
>>>>>>>>>Tony R:
>>>>>>>>>>FolkGT:
>>>>>>>>>>> I'm hesitant to make any
>>>>>>>>>>> changes from the default of 50%, because I'm concerned that 50%
>>>>>>>>>>> might mean "linear", which is desirable.
>>>>>>>>>>
>>>>>>>>>>50% is indeed linear, above this is exponential and below
>>>>>>>>>>logarithmic.
>>>>>>>>>>
>>>>>>>>>>I seem to recall earlier profilers actually displayed the graph of
>>>>>>>>>>how
>>>>>>>>>>the controller profile was being mapped. Non linear can help with
>>>>>>>>>>brake
>>>>>>>>>>pedal mappings (iRacing include this option in sim) linear seems
>>>>>>>>>>pretty
>>>>>>>>>>good for steering though. 100% is making it much more sensitive
>>>>>>>>>>around
>>>>>>>>>>the centre, could be why it feels like it is removing any deadzone
>>>>>>>>>>though.
>>>>>>>>>
>>>>>>>>> That is my understanding. A value of 50% for steering sensitivity
>>>>>>>>> =
>>>>>>>>> linear response. Reducing the value would cure steering that is
>>>>>>>>> too
>>>>>>>>> twitchy around the center, and increasing it would do the
>>>>>>>>> opposite.
>>>>>>>>
>>>>>>>> Well, I just tested it. With Ford Falcon it is very easy to
>>>>>>>> see what
>>>>>>>>is going on. BTW, if you click with right mouse button on slider,
>>>>>>>>you'll get
>>>>>>>>"What's this" box. Clicking on it, you'll get explaination of what
>>>>>>>>this slider does.
>>>>>>>> It is very simple, with 100% you get direct contact with
>>>>>>>> FFB,
>>>>>>>>anything less loses contact with FFB, and introduces slack, which
>>>>>>>>behaves
>>>>>>>>very much like a dead zone, only it isn't dead zone, but just a lack
>>>>>>>>of sensitivity.
>>>>>>>> 50% isn't linear, 100% is linear, anything else is less
>>>>>>>> linear.
>>>>>>>
>>>>>>> Then you have to ask yourself... why did Logitech make the default
>>>>>>> 50%?
>>>>>>>
>>>>>>> Two people have told you that 50% = linear. A Google search would
>>>>>>> turn up
>>>>>>> the same answer. You can go with that, or ignore the facts and just
>>>>>>> muddle about on your own.
>>>>>>>
>>>>>>> You should certainly consider the possibility that you've jacked
>>>>>>> some
>>>>>>> other setting up so much that what you're "feeling" with the slider
>>>>>>> at something other than 50% is just a compensation.
>>>>>>
>>>>>> You guys are right, thanks. Steering wheel on the "Options"
>>>>>> screen clearly shows that you are right, thanks.
>>>>>> But, this isn't that easy. 100% drive so beautifully, and this
>>>>>> is
>>>>>> the ultimate judge. But, thanks, you are right, somewhere else is the
>>>>>> problem.
>>>>>> Well, I already checked absolutely everything, and the only
>>>>>> thing
>>>>>> that is left is the calibration process, which I started to fiddle
>>>>>> with. Here somewhere I must be getting slack.
>>>>>> Thanks again, : ).
>>>>>
>>>>> Ok, I found it. With calibration everything is ok, calibration
>>>>> is
>>>>> simple process, and it doesn't affect FFB significantly (thanks God).
>>>>> Regarding removing slack, I did the same like when I've put
>>>>> Overall
>>>>> at 143%, only this time I left Overall (O) at 100%, and lowered Spring
>>>>> (S),
>>>>> Damper (D) and Centering Spring (CS) equally. I tested a lot today, so
>>>>> I am
>>>>> too tired to find "the right" value for S, D and CS today (I'll resume
>>>>> tomorow). It is somewhere between 58 and 70%. I tested 50-56%, and
>>>>> tried
>>>>> 57%, and it is above those. It isn't 57%, so the difference between O
>>>>> and S/D/CS isn't the same like before, but it is close.
>>>>> Regarding how this behaves (so far), excelently. I am more than
>>>>> pleased. It behaves just like it should.
>>>>
>>>> Oops, it is 54%, maybe even less (who knows, it could be 50%),
>>>> meintenance disturbed testing. It isn't more.
>>>
>>> Ok, I am having some progress.
>>> Yes, it should be 50%. Centering Spring should be 50% (and it is
>>> responsible for slack). Spring and Damper is per individual preference,
>>> as
>>> long as they are equal. One can even run them at 0% if he wants "pure"
>>> forces.
>>> This is for Overall = 100% and natural FOV. I don't know if
>>> Centering Spring should be other than 50% if Overall isn't 100% and FOV
>>> isn't natural. Maybe I'll test this some day.

>>
>> Hm, it turned out that it isn't just any Spring and Damper (equal)
>> the best. Too low, too spring, too high, too dampy. It turned out that
>> the
>> best is 71%. Well, this isn't good. Why? Because if I put 100/71/71/50,
>> then
>> 50 is 71% of 71, which means that Spring and Damper are equaly distanced
>> from Overall, as Centering Spring is from Sping and Damper. Not good.
>> Well,
>> too late today, I'll have to resolve this puzzle some other day, : ).

>
> A new day, : ).
> Since 100/100/100/100 works well if sensitivity is 100%, I wouldn't
> be surprised if all this doesn't have something with the position of
> sensitivity.


Hm, Spring and Damper at 71% work well with Centering Spring at
100%. I'll see if there is more to it.

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