Are you still worrying about the uniformity of servos？The solution is very simple：output same pulsating signal，check the angles of different servos.But if you use Dr.Servo,all you need is just three steps：set required journey range，connect with servo you need to test and push the button.S1 uses accurate measuring angle of servo helps players who require highly of servos to know better about the servo in their hands.

Right picture: as per the order on packing case, connect S1 to BATTERY, gyro sensor to GYRO..
Measurement of servo travel linear and range:
Long press on the button of S1 to adjust and switch the display, now switch the display to “ servo travel measurement---PWM output ”（short press on the button is to turn on the back light）
On the S1 button, “up” and “down” is to adjust step-length, “left” and “right” is to adjust output impulse signal range, servo will work. The bigger the step-length, the servo works faster. We can measure the travel range and know the servo dead band.
Measurement of servo speed:
First, to make the measurement of servo 60° travel impulse signal by the protractor printed in the manual.
Long press on the button of S1 to adjust and switch the display, now switch the display to “ servo travel measurement---PWM output ”（short press on the button is to turn on the back light）
“up” and “down” is to adjust step-length, “left” and “right” is to adjust output impulse signal range, servo will work. The bigger the step-length, the servo moves faster