Linear Positional Servo Actuator
Take one Glue stick and wash the living daylights out of
it in 30 degreeC water, as the glue is water soluble.
Stick the servo horn to the rotational bottom
Cut a groove in the movable insert (this is the bit that the glue is normally attached to)
This will marry to the slider lug of the potentiometer (it needs to be a snug fit - no backlash)
Take one normal servo and convert it to a continuous rotation type .... however don't attach the normal 2 resistor mod..
... instead extend the potentiometer wire outside the casing.. these will be attached to the new feedback linear pot. :-)
This means that the servo is able to turn approx 7 full turns along its length, with works out as 2000 steps in my case.
..... and giving 7 times more Mega Torque
Side Tip :- unused Cat5 ethernet cables contain twisted pair wire - great for recycling (thanks NASA)
Testing with sons car controller - however was unable to test full range ........
First Test tipped the balance scale into "Err"
Second test i backed off the pressure to show that 3kgs can be reached..... certainly more........