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Old January 16th 12, 04:11 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:
>>>>>>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.


Hm, interestingly, 143 to 100 is in similar correlation as 71 to 50,
or as 100 to 71.

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