Tips for Modifying Servos
Submitted by airman00 on February 21, 2008 - 12:04am.
OK so here I am making my own tips for modifying servos . After reading all my tips , follow the instructions on the webpage linked on bottom for instructions on modifying the servos .
- To modify the servo replace the pot with two 2.2K precision ( 1% -2% tolerance) resistors
precision resistors are not available ,but you have resistors with the
same color-band , get a multimeter and measure which resistors have the
closest resistance. Then pick the two resistors that have the closest
resistance and use those.
- Be careful when desoldering
the potentiometer ( if it has leads connected to the PCB) . If the
potentiometer has wires coming out of it and not only leads, solder the
resistors to the wires and not directly to the circuit board. ( photo courtesy of Seatlle Robotics Club)
you cut the wires off the potentiometer ( if it has wires) , cut it so
that the potentiometer can be reused later on, you might need it in one
of your projects.
- After you have modified the servo
circuitwise, try to remove the pot from the inside of the servo. If the
potentiometer is hard to remove , DO NOT USE FORCE, and just leave it
- Also, when using servos for locomotion. One
servo has to be going clockwise and one has to be going
counterclockwise for the vehicle to move forward, right? So on one of
the servos , reverse the wires to the motor so that way , both motors
will get the same pulse to go forward.
- When you modify the
output gear for continuous rotation saw it carefully, making sure not
to damage the gear teeth, and use a file to smooth it out.
- Before putting the servo back together , make sure all the gears can move and that nothing is stuck in between the gears
tip: Be careful when opening a servo. Open the screws carefully and
don't lose gears, as well as do not touch the grease too much.
The instructions are below , but remember all the tips I mentioned and follow the instructions in accordance with the tips .
How to Modify A Servo by Seattle Robotics Club