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Legs on Robot — Parallax Forums

Legs on Robot

AImanAIman Posts: 531
edited 2006-08-03 05:20 in Robotics
Has anyone built a robot with·legs that fold in the middle? I see lots of robots that have 6 legs with knees but not many that fold. In other words the robot would look like an M from the end or an upside down U when extended. I guess spider like would be a good term.

Comments

  • dandreaedandreae Posts: 1,375
    edited 2006-07-28 17:47
    Check out this link:· http://www.crustcrawler.com/products/legs.php?prod=9


    Dave

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Dave Andreae

    Tech Support
    dandreae@parallax.com
    Http://www.parallax.com

    ·
  • scary_botscary_bot Posts: 32
    edited 2006-07-29 01:51
    Nice legs..... Take a while to save up for them baby's.... [noparse];)[/noparse]
  • scary_botscary_bot Posts: 32
    edited 2006-07-29 02:55
    Here's a site worth looking at if your interested in legged bots with multiple points of fredom....

    http://www.lynxmotion.com

    ·They have kits with elec, with servos only, or bare bones where you would have to supply your own servo's, and elec.

    I'm considering this one.... http://www.lynxmotion.com/Category.aspx?CategoryID=28


    ·
  • AImanAIman Posts: 531
    edited 2006-07-29 03:47
    Thanks. There good links, I was thinking more·along these lines.

    This is how it would look with a low body



    ·· l\·································· /l
    ·· l· \·······························/· l
    ···l·· ·\···························/··· l
    ·· l····· \·······················/····· l
    ·· l······· \___________/········l
    ·· l·········l___________l······· l
    ·· l····································· l
    ·· l····································· l
    ·· l····································· l


    · With legs that could extended upward it would look more like this

    ·············· __________
    ·· ______l____________l_____
    · l········································ l
    · l········································ l
    · l········································ l
    ··l········································ l
    · l········································ l
    · l········································ l
    · l········································ l
    · l·········································l
    · l········································ l
    · l·········································l
    · l········································ l
    · l·········································l
    · l········································ l


    · Anyone seen anything like it?



    Post Edited (AIman) : 7/29/2006 3:51:23 AM GMT
  • bulkheadbulkhead Posts: 405
    edited 2006-07-29 04:43
    That kind of reminds me of this: www.lynxmotion.com/images/hi-res/ah3r02.jpg

    You could build your own simpler version using only 4 legs, 1 servo to raise/lower each leg and 1 to pivot forwards/backwards, so it only uses 8 servos.
  • AImanAIman Posts: 531
    edited 2006-08-02 19:49
    So if I am getting the drift of this it would take 2 or 3 servos per leg. One for each joint and one for movement forward and backward. In other words 4 legs would run 8 - 12 servos and 6 legs would run 12 - 18 servos depending on if it is a leg with a single joint or a leg with to joints?

    In other words a biped with a knee would require 2 servos but a M shaped leg like I diagramed above would be a 3 servo knee.

    Am I following that correctly?
  • dandreaedandreae Posts: 1,375
    edited 2006-08-02 23:57
    Yes, you are correct.

    Dave

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Dave Andreae

    Tech Support
    dandreae@parallax.com
    Http://www.parallax.com

    ·
  • bob000555bob000555 Posts: 5
    edited 2006-08-03 05:20
    You migh be able to hack the legs of this bot http://www.robotstore.com/store/product.asp?pid=730&catid=1555
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