Make: Robotic Arms

83Chapter 4: More Links, More Precision

remixed design provides us with a great deal of

benefits when compared to our first robot. Now

that we have both motors at the base of the system,

this allows for a much lower weight nearer the end

effector, increasing the overall efficiency of

the robotic-arm system. Additionally, the

end effector is now supported from two

sides, making the tip of the robotic arm

much sturdier.

The mix of active and passive joints with our

new design means that if we want to effectively

control our robot, we need to be able to move

both motors together. Generally speaking, if the

motors are moving farther and closer together ...