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If You decide to make one Youself (DIY style) - precision will be horrible.
That is the kind of detail I am interested in : what is the difficulty in making precise robots? Are there special actuators that are required? If so, are such precise actuators available commercially?
I am also interested in what is the difficulty of using somewhat precise sensors in a robotic gripper. Are there no commercial and relatively inexpensive (compared to the insane $35000 price tag of the gripper I mentioned) options for sensors?
I understand that designing a precise robot is very difficult and expensive -- but I want to know if there are other, more "physical" constraints on building relatively inexpensive (say, with a price comparable to a car) robots.
[...] if You want Your robot capable of crushing an elephant [...]