RE: Setting up pull-pull with JR 8611
I have digis on several planes, small and large. They hum most of the time. At first I thought it would run down the battery. Has never happened. BUT, you can check for the following. Any kind of bind or pressure will cause them to hum. On the pull-pull if the tension is to tight, they will hum; if a normal servo arm is off line or twisted, it will make the servo hum.
Most of the time, they hum just because they like to.