Continuous Rotation Micro Servo (5min, No Soldering or Extra Parts)

I used a 9g microserver from Towerpro, but most of these servos are similar, so most should work.

This took me under 5 minutes, and if you're doing more than one should be even quicker.

Tools:

Screwdriver

Glue (hot glue is probably better than super glue)

Knife

1.5mm Drill

Instructions:

1. Plug in the servo and run the following arduino script to centre the servo:

#include <servo.h>

Servo myservo; // servo object

void setup() { myservo.attach(2); } // attaches servo to pin 9 to the servo object

void loop() { myservo.write(90); } // sets servo to midpoint

Leave the servo connected and running

2. Remove the screws, and take off the top casing.

3. Remove the gears and twist the potentiometer until you find the stable angle with no motor activity or humming (it should be pretty close already).

4. Glue the potentiometer so it can't turn. Glue it away from the wiper to stop the glue interfering with the electrical connection.

5. Now cut the rotation stop off the top gear.

6. Drill the index flat out of the top gear bearing hole with a 1.5mm bit (the potentiometer shaft is 1.3mm, but the extra clearance won't cause problems). This should now spin freely (previously the gear rotated the potentiometer).

7. Reassemble et voila.