Telescoping Arm

[ArmoredFairy698]

With all the robotic arm designs out there...has anyone created a telescopic arm that looks like a telescope?

(As in 2 or more cylindrical pieces that extend out of one another...think toy lightsabers, how they fit inside one another and extend to a larger length).

If you have created one, would you be willing to share how you automated it? Did you use some sort of gear box? Pneumatics? A pulley system?

I'm looking into making one, but I don't know how to keep it entirely self contained and automated. It needs to be some sort of interior mechanism that has the ability to move the "arm" up and down.

Is there any way a servo motor could be brought into this and be used to power the up and down motion of the arm?

Any ideas/suggestions are welcome and appreciated!!