Servo Tester

This is a device I made to test and setup servos for my RC airplanes. My most recent build was a sailplane with V-tail and spoiler. The servo setup got quite complex. Each ruddervator servo had inputs from both the rudder control and the elevator control. The ruddeer stick required nearly twice the response on the ruddervator as the elevator stick. In addition I wanted dual rates and expo. When the spoiler is activated I needed to mix in some up elevator to offset the loss of lift.

Before installing the servos into the sailplane I wanted to be sure everything was working the way I envisioned. I tried hooking up the servos and receiver just laying loose on my desk but found it was hard to get a good feel for exactly how much a servo was responding to a transmitter stick movement. This thing allows me to measure the servo response in degrees.

There are 2 different versions. One uses rubber bands to hold the servo while the other uses a pair of bolts. Other than that they do the sa