How To - Servo 360 Mod

I get a lot of question as to how i did the servo mod for my rc rover. That is involving modifying a normal 9g servo to be able to turn freely on both direction.
I got the tips from a youtube channel rctestflight which happens to be the same person i got the idea to build the rc rover. The build is really cool (you can ask my son) and the modification needed is simple. Anyone with a spare servo and couple of old broken one could easily make it.



Basically its involve extending the limit of which the servo can operate by removing its mechanical stopper. And telling the servo board that it is always at its center position so it will stop rotating once no stick input is given.

So lets get going. You will be needing:

• a working servo
• a broken servo
• wire cutter
• soldering iron
• knife

A working 10g HK servo and a broken 9g TP servo

Open the broken servo to get its potentionmeter.

Potentiometer from above. Placed under the gears.

Potentiometer from inside.

I cut the servo casing to take the potentiometer out.

Potentiometer out from the servo casing.

Add caption

Potentiometer removed from the servo board with its 3 wires intact.

Open up your working servo.

Disable the internal potentiometer by removing its 3 wires of the servo board.

Solder the 3 wires from the potentiometer that you just salvage from
your broken servo to the servo board. Placed it where the internal potentiometer
wires were placed before.

Mechanical stopper.

Remove the stopper by cutting.

Stopper removed.

Afterward you can put the servo back together with the added potentiometer placed outside the servo. The 3 potentiometer wires can came out the same place your servo wire is. Sorry that i forgot to take a picture of this step.

Setting up your new modified servo.

You can setup the test like i did or just use you tx and rx. Put the servo in one of your channel with the stick that have spring in it (self centering). When you power it on, your servo going to move to one side none stop. Try to turn the external potentiometer till the servo stop. Then your a done.

Glue the external potentiometer to avoid it from turning as if you are
locking the servo center/stop position.

Hotglued the potentiometer to the servo where you seem fit.