Originally Posted by livonia bob
The other problem is that the last gear also drives the shaft that turns the wiper on the pot. This shaft is driven by a brass insert in the plastic gear, this insert on some servos is NOT held to the gear very well and will slip, when it slips the gear/arm is moving to the end of it's travel and jamming because the shaft turning the wiper on the pot isn't turning due to the insert slipping. So the servo doesn't know that the arm has moved and is now jammed and is still trying to move it,,, this burns out the motor if allowed to go on very long..
Little bit of hot glue to fix this one maybe. Do it before it becomes a problem.