Right, system specs:
AMD Athlon XP 3800+
Nvidia Geforce 7600GT
Logitech Momo Force (black)
Win XP Pro, SP3.
Logitech Drivers ver5.02.
My Momo Force (black) loses calibration while driving. For example, after turning a corner, the center position in the game no longer matches the center position of the wheel, i have to hold the wheel 30deg to the right to make the car drive straight, and after a few more corners, it might have slipped calibration back to normal, or maybe now i have to hold the wheel 60deg to the left to drive the car straight... Basically any time you move the wheel fast, or fight the force feedback. This is not unique to LFS, happens in GTR2, GT Legends, The windows game controller calibration util etc... So i assume its hardware related.
I assumed it would be something slipping inside, so i cracked it open and had a look... Really, there is nothing to slip, as its all geared in there. Then i noticed that these beasties use an optical sensor to detect wheel motion, not a variable resistor, so i assumed it would just be dust causing the optical sensor to miss movements... After a dissassemble and clean, still no dice! Problem is still there...
Then I thought the gear on the back of the motor that runs the optical sensor disc *must* be slipping, even though it has no load on it to make it slip... I marked it with some twink, played a bit to experience the problem, and checked its position relative to the motor spindle... It hasent budged...
I've tried the Logitech clear calibration utility, it tells me there is no calibration information to clear. I've tried the MOMORACINGCenterFix that has been suggested, and it just stuffs up the signals, wheel does basically nothing, and pressing the pedals makes the wheel turn erratically in-game...
One interesting theory I did read is the EMF caused by the force feedback motor brushes arcing on the spindle interferes with the optical sensor circuit... This sort of makes sense, and matches the symptoms, as after further investigation it is only when the FF motor kicks in that the wheel loses calibration. Apparently one gentleman solved this by grounding the case of the motor and wrapping the motor case in aluminium-foil. This is my next step, should be interesting.
Anyway, apart from this last idea, can anyone please shed some light for me? Ive been hunting this inter-web thingee for the last 4 hours and have found alot of people complaining of the same symptoms, but no solid answers...
[edit] - I should mention that for the first 2 years of ownership the wheel was awesome, no problems whatsoever
, this is a recent occurrance.
Chur, Zac.