
48 Make: Robotic Arms
book is made up of a 24 × 24 grid of 10 mm squares, so the lines are 10 mm
apart, giving us a grid of 240 mm × 240 mm. For the end effector to reach
the middle of the board, the end effector needs to reach the coordinates (120
mm, 120 mm). If only there was a way to allow the robotic arm to have a goal
position and to calculate the angles each of the motors would need to reach
in order to get the end effector into a specific position! (As you may have
guessed by now, there is.)
We can achieve a control system in which we can input a desired coordinate,
and the robot will calculate exactly how to get there, all through the ...