Servo humming

[TRUCKMAKER]

What radio are you using? If I understand this you have a battle switch connected to your receiver and the latch servo connected to the battle switch? If so, why?

Radio is an airtronics RDS 8000. I'm not sure if battle switch is the correct term. The switch is on the left upper side under the "retract gear" this is how I bought it from another member on here. What you originally said makes sense. It only hums when the latch is locked. The end point probably needs to be adjusted. Can this be done directly on the servo or does it have to be done with programming on the tx?

[ricm]

Test for 'servo binding' by removing the servo from the model and activating it as you normally would with it installed. If the humming goes away then something in your model/ linkage set up is restricting servo movement. If not resolved then your servo will burn out as noted by TRUCKMAKER.

You could move the connection point of your cable or rod closer to the servo horn center screw. Mechanically, this has the same effect on the linkage as reducing the servo end points and might be a simple way to solve a binding problem if you have limited options with trimming/ set up.