Calibrating your force feedback wheel using wheelcheck and ffbclip

@Atle Dreier
I made an icon for your app because I had too many 'default' ones and couldn't easily find it while racing.
I post it here should anyone want to use it too.

If I wasn't allowed to, just tell me and I'll delete it.
Thanks for your app!



Unzip in your Assetto Corsa folder

 

Did the FFBClip app say 200 even after driving a few minutes?

Sent fra min SM-N910F via Tapatalk

 

I just drove for a few hundred metres. Less than half a lap. Trembling etc....And for example in the 488 it changed from 100 to 126 to 115, then I stopped because it did not feel good
Do I have to drive a few laps or?

Cheers
Robin

 

A few minutes at least.

Sent fra min SM-N910F via Tapatalk

 

C:\Program Files (x86)\Steam\steamapps\common\assettocorsa\system\cfg\assetto_corsa.ini

[FF_EXPERIMENTAL]
ENABLE_GYRO=0
DAMPER_MIN_LEVEL=0.1
DAMPER_GAIN=0.1

 

If GYRO=1 what can I expect ? ATM not near my rig.

Cheers
Robin

 

Hmm... like a slight tightening of the wheel's rotation as you move away from centre.

I used to really prefer Gyro=1 but I feel something changed in the last update and now it feels better to me with Gyro=0.

This is something you should really test yourself though, when back at your wheel.

 

I would describe it as the name "Gyro" implies - it acts as a stabilizing-effect. Dampening can have a similar feel but, perhaps comes with loss of detail; maybe just my suspicion though.

 

Thanks man. This GYRO thing works for me! It now again just feels the way I want it to.

Interesting stuff.

Cheers
Robin

 

Hi Atle, love the FFBClip app, the change to the histogram technique is a winner. Thanks so much for the time and effort you've poured into it.

You may have seen that I've jumped on the coat-tails of grimdanfango in challenging the common assumption of non-linearity of our consumer wheels based upon the common misinterpretation of the default Wheelcheck linear force test. I encourage you to have a look in the LUT thread if you haven't checked it recently.

In short, it appears that the T300 is actually quite linear and therefore T300 owners can save themselves a lot of mucking around and crank their wheel up to 100% and then use your FFBClip app to get the most from their wheel.

I've only got the T300 to test, but it's very likely many (most?) consumer wheels are also linear enough to do the same. Eg your T500.

Wheelcheck still has some uses, eg perhaps for exploring minimum force, but it seems it's not as important as we've long believed.

It's quite a paradigm shift, and you're a key figure in influencing the sim racing masses. The idea of de-throning wheelcheck is not likely to be adopted easily, especially since threads like this one start with a big wheelcheck graph and a description that 60% is the more linear overall compared to 100%. I hope you can take a moment to review and consider.

 

I haven't read it, but I've been made aware of it several times lately. I don't use my T500 any more, after the OSW got here. Naturally, LUT and FFB processing is less interesting to me with such a wheel, but I won't stop supporting and developing the FFBClip app. I'll make it my mission to update both the app and the Calibration thread soon™. It's very intersting that Thrustmaste have 60 as the default overall gain for the T500 (and I believe 70 for the T300), since both those gain levels are the ones seemingly most linear in Wheelcheck.

Having said that, on a "lossy" system like the T500 and T300 (and most other consumer wheels) the transient capabilities of the wheel seems very different from the static capabilities. If this is from processing, mechanical losses or other factors I haven't really done any research. Both a dynamic (wheelcheck) and static (pole and scales) have their strength and weakness. I have thought about the flaws in the Wheelcheck method, and indeed discussed it in one thread somewhere. If the window is long enough to allow the wheel to reach close to maximum speed, the result will be exactly what we see for the T300 in particular, the "flattening" of the higher forces. With a shorter window the result "should" approach" the static result, and that does indeed seem more linear than the default window suggest. On the other hand, is the T300 really that much weaker at higher speeds, like the Wheelcheck result seem to suggest? In that case, at what speed doe we measure it? When driving the wheel is certaily not stationary, so ow fast is fast enough to convey the real deal? So, the issue with these wheels is the non-linearity, or inability to keep the torque at higher speeds, depending on how you measure it. For such wheels using LUT is flawed, since the LUT will only compensate for a single measurement, usually a dynamic, speed limited scenario like you get from Wheelcheck. I'll surely catch up with the dicussion and chime in where I can.

 

Yes Atle, I agree with you. Both methods have their place in understanding the characteristics of our wheels, but should not be taken as the Bible of linearity. When we receive forces through the wheel we resist them, but we don't keep the wheel steady, we move it too. So, neither method of measurement is exactly the result we should be basing our settings on. Something in the middle is usually the best and then go from the by feeling and preference.

 

Or go the DD way, and keep the servo so well within it's capabilities that it becomes irrelevant. It's only an issue for consumer wheels that are driven to the extremes of their perfomance envelope.

 

I have completely missed this post! Sorry! Do yo mind if I use the icon in the next releases as an integral part of the app?

 

Updated the first post a bit, so it's more relevant, and with links to updated information about LUT and linearity. The thought is to fully update the post at some point, but at least I have removed the blatant misinformation now..

 

Of course you can use them. Glad you like them

 

I'm already using them - they are a great, simple addition to an already great app

 

How do you make a grach like what I am seeing on this forum I am trying to figure out the min force on my ts pc racer

 

Dampening is only used by AC in the 'near zero kph' physics; it adds weight/resistance to the wheel while sitting still. Once you go above a handful of kph it is completely turned off, no matter what percentage it is set to in your wheels control panel.

The gyro effect amplifies the gyroscopic effect of the rotational mass from the tires on the steering rack. It basically makes your wheel progressively heavier the faster you are going. It has a stronger effect on open wheel cars than on tintops.

 

Thanks for the clarification about Gyro.