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Engineer This! — Parallax Forums

Engineer This!

ercoerco Posts: 20,256
edited 2013-06-17 13:41 in General Discussion
A little website with some cool homemade projects, even if the guy uses the wrong processor. :) Some IK for Martin_H, a quad walker, RoboVoice (for me), a CNC router, and a motion tracking airsoft gun.

http://www.engineer-this.com/Quadruped.shtml

http://www.engineer-this.com/robovoice.shtml

Comments

  • WhitWhit Posts: 4,191
    edited 2013-06-14 09:11
    Send him a PropBoe - Quick!
  • Martin_HMartin_H Posts: 4,051
    edited 2013-06-14 18:52
    Thanks for posting. That quadruped is really well built.
  • Duane DegnDuane Degn Posts: 10,588
    edited 2013-06-14 20:27
    I've always thought hexapods looked kind of creepy, but there's something about a quadrapod that's even creepier.

    I like his CNC machine. I've be itching to make/buy some sort of CNC router and I think I'll start looking on ebay for the linear bearing he used.

    I think a 12" x 24" cutting area would be enough for my needs.
  • Martin_HMartin_H Posts: 4,051
    edited 2013-06-14 20:49
    Duane Degn wrote: »
    I've always thought hexapods looked kind of creepy, but there's something about a quadrapod that's even creepier.

    While hexapods are creepy they at least mimic something we're familiar with. This quadruped moves like no animal on Earth because of the weight shifting side to side. It looks a bit drunk as it tries to avoid dynamic stability which is natural to most land animals.
  • Martin_HMartin_H Posts: 4,051
    edited 2013-06-17 12:22
    Martin_H wrote: »
    While hexapods are creepy they at least mimic something we're familiar with. This quadruped moves like no animal on Earth because of the weight shifting side to side. It looks a bit drunk as it tries to avoid dynamic stability which is natural to most land animals.

    The quadruped video made me curious if any animals use that gait. It turns out that it is called the creep or "pacing" gait and is used by cats, camels, and giraffes. The gait is characterized by moving two legs on one side before moving the opposite side. It is statically stable and used when the animal is on uneven ground which makes complete sense. However, these animals can transition to the trot or "diagonal" gait which is the classic dynamically stable quadruped gait.
  • ercoerco Posts: 20,256
    edited 2013-06-17 13:18
    But you knew that already, Martin_H! :)

    http://forums.parallax.com/showthread.php/137983-Giraffe-Gait-ATTN-Duane-amp-Martin_H!?highlight=giraffe
  • Martin_HMartin_H Posts: 4,051
    edited 2013-06-17 13:33
    Well my memory isn't what it once was. The giraffe video is interesting in that it sure looks like both legs on the same side are off the ground at once. That makes it the creep gait plus dynamic stability.
  • ercoerco Posts: 20,256
    edited 2013-06-17 13:41
    A baby giraffe drops 6 feet to the ground after birth from its standing mother. That's a worse slap into reality than spanking a new human baby to make it cry!
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