Weird Wheel Behaviour

[TiktaalikDreaming]

On some of my wheels (not all) I'm seeing a weird behaviour when the suspension load is either very light or relieved completely (eg, inside wheels on a sharp corner).  The wheels basically snap to past the top of the suspension travel (I suspect top of travel plus the suspension distance again) and back again, sometimes in a vibrating buz between the *correct* position and the anomalous.  Sometimes, with wheels popping up, it reminds me of shovel snouted lizards dancing on hot sands.

I'm assuming there's a combination of settings that is creating this weirdness.

[nli2work]

too light a load can give jittery wheels, this is a constant "buzzing" type of jitter. try dialing up/down Spring/Damper ratio depending on the load. . versus other kind of jitter where the wheel pops up once in a while, that could be non-wheel collider hitting the terrain.

It's hard to say what exactly is causing the problem, too many variables in the kitchen. Double check the layers for the colliders, matching transform names in the config files, before tweaking values. 

if you have LookAt constraints, it could be the looker object flipping when the look-at object passes gimbal axis.

Edited May 11, 2016 by nli2work

[TiktaalikDreaming]

5 hours ago, nli2work said:

too light a load can give jittery wheels, this is a constant "buzzing" type of jitter. try dialing up/down Spring/Damper ratio depending on the load. . versus other kind of jitter where the wheel pops up once in a while, that could be non-wheel collider hitting the terrain.

It's hard to say what exactly is causing the problem, too many variables in the kitchen. Double check the layers for the colliders, matching transform names in the config files, before tweaking values. 

if you have LookAt constraints, it could be the looker object flipping when the look-at object passes gimbal axis.

Thanks.  Nice collection of stuff to check.  The only one I can discount immediately is the layers.  I've been super paranoid about layers since spending days trying to sort out orientation of an IVA that wasn't correctly layered, and I know 100% that the layers are right for the wheels.  But, yes, LookAt constraints in play, wheels are sinking to the point the helper collider for the wheel might be hitting, and obviously there's always tweaking of spring/damper settings.  Easiest to check is the non-wheel collider.  I'll let you know.  :-)

 

Update:
Not the collider, and not lookAt constraints either, damnit.  Suspension tuning it probably is.  :-/

 

Looks like spring.  Added a zero and it spazzes out on the launchpad.  Divided by ten and it's almost gone.  Although the suspension is now almost bottoming out.  moar tuning.  :-(

Edited May 11, 2016 by TiktaalikDreaming