Modifying servo to full rotation and removing servo circuits

In this tutorial we are going to see how to turn a regural servo into full rotation and remove the servo circuits. After this operation it will be just a dc motor with a build-in gear box. It's needless to say that this is going to void all warranties.

Why would we wan't to ruin a perfectly good servo? At first, most servos can't make 360 degree turn which limits using them in some devices. Secondly, removing circuits enables us to control motor just by turning the power on. Because of the gear box servos have more torque than normal dc motors. It is easy to attach things to the servo horn.

Tools and parts you need:

Servo
Soldering iron
Screwdriver
Carpet knife
 

Step 1.

Remove the screws from the bottom of the servo. Watch out not to drop all the little gears inside the servo.

Step 2.

Spots marked in the picture below are the ones that are keeping the circuit in place. Heat them with soldering iron and gently pull the circuit up.

This is how it looks at this point.

Step 3.

Cut the servo's electric wire and solder it to the motor's + and -. You can remove the white wire as we won't be needing it anymore.

Step 4.

Open the front cover of the servo. Use the carpet knife to cut of the plastic stoppers pointed in the image below.

Step 5..

Screw the cover back to it's place. Your motor is ready.

Please give feedback about this tutorial to kimmo.karvinen (at) bionicmechanic.com