Make: Robotic Arms

53Chapter 3: Inverse Kinematics for 2D Movement

WHAT ARE WE BUILDING?

Now that we have our first robotic arm built, we can use some of the math

we just discussed to determine a set of mathematical equations that

will allow us to quickly and accurately point the end of the robotic arm to

anywhere on our grid system. Though this might not sound too important,

these sorts of equations can be used for all kinds of fun projects, like a robot

that plays board games, a drawing robot, or even an automatic homework-

writing machine.

Thanks to some helpful geometric principles, our first step will be to add

a new line to our mathematical model (Figure

3-6 ...