[TacticalCoder]

I've always wondered... Why aren't pantographs used more with robots when precision is needed?

It's used to cut precise wood pieces or carve wood or metal etc.

https://en.wikipedia.org/wiki/Pantograph

https://youtu.be/s56J_Rnh_Co

You use the "big" part to drive the "small" one, which gives it great precision.

[abecedarius]

Feynman brings up some problems with pantographs and precision in https://calteches.library.caltech.edu/1976/1/1960Bottom.pdf (page 6-7). I haven't thought about it myself, though.

[whamlastxmas]

Pantographs are mostly useful in 2 dimensions and any robot only needing two dimensions can just use rails which will be more accurate