 | | Re: articulation points? —Rob Limbaugh
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| | | Everything I've ever seen mentioning DOF refers to absolute reference points (a focus, if you will, or origin) that the range is controlled by. In terms of articuation, each DOF corresponds to a joint, which is a fixed focus point that the range (...) (22 years ago, 20-Nov-02, to lugnet.robotics)
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| | | | | Re: articulation points? —Eric Sophie
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| | | | You present interesting aspects of the term, could it be that the term has many meanings and really if we understood it correctly we would do justice to the proper meaning. Context is everything, yet you raise ideas and examples that indeed (...) (22 years ago, 20-Nov-02, to lugnet.robotics)
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| | | | | | Re: articulation points? —Jennifer Clark
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| | | | (...) I think you've hit the nail on the head here Eric. To me, the most logical way of looking at a robot arm would be from the point of view of the end effector, i.e. what it can and cannot do. The way the arm moves to get there may be of less (...) (22 years ago, 20-Nov-02, to lugnet.robotics, lugnet.build.mecha, lugnet.technic)
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| | | | | | Re: articulation points? —Trevyn Watson
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| | | | | (...) Here I go, tossing my 2 cents in to the fray: I would say that any differential drive on a flat surface has 3 DOF: -Assume it drives along the X axis (thats 1) -it can rotate around the Z axis (2 now) -once it rotates it can drive along the y (...) (22 years ago, 18-Nov-02, to lugnet.robotics, lugnet.build.mecha, lugnet.technic)
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| | | | | | | Re: articulation points? —Gordon Bentley
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| | | | | | (...) Exactly. Another way to look at DOF is that it is the number of things that have to be specified to define a particular configuration of the system. In other words how many RCX outputs does it take to drive. Another thing to keep in mind is (...) (22 years ago, 22-Nov-02, to lugnet.robotics, lugnet.build.mecha, lugnet.technic)
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| | | | | | Re: articulation points? —Gordon Bentley
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| | | | The main reason it would make sense to quote the total DOF is that is determines the volume the arm needs or is able to work in. For example imagine a snake-bot with a dozen 2 DOF joints. It can reach around objects to position it's effector. So it (...) (22 years ago, 21-Nov-02, to lugnet.robotics, lugnet.build.mecha, lugnet.technic)
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| | | | | | Re: articulation points? —Steve Baker
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| | | | (...) The trouble with this is that it's not necessarily true. Take 100 Lego turntables and connect them up into a vertical column. By this measure, it has 100 DOF - but as a mechanism, it has no more flexibility than a single turntable (1-DOF). (...) (22 years ago, 21-Nov-02, to lugnet.robotics)
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