Andrew: I have had it on each and every servo motor I have ever tested, including my big AKM Bogeyman, AKM52/3/4, 64, 65, as well as 5 or 6 different size Mige servos, M10010 and M15015 amongst those…
Settings, as well as final inertia, including wheel, QR, button-box and servo-shaft itself, all has a very big influence on how your motor will sound, compared to someone else’s . Sturdiness of your rig, how/where the displays are mounted, even your seat and pedals, also add to this.
As a simple example, you will not find a better, smoother servo, than the Utimate, for DD wheels. My rig must weigh 140+ kg, and it is an absolute study in rigidity - yet, when testing both my Pro and Ultimate servos, you can hear the chatter.
Go and watch my videos, you will hear it. Bogeyman is a lot less pronounced, as it has a very high inertia compared to SC2, thus is less active, on top of that, I am applying a fair bit of damping to manage the 38NM 1:1 torque levels… but when I really drive it in anger, or desperation, once my skills run out, you can hear it too.
On the Ultimate, a simple way to get rid of this is to reduce slew-rate to 0.1, add a bit of Damping, Friction and Inertia, and it is smooth like a rubber-band…