Mana Cat
"Eric Sophie" <[email protected]>
| Newsgroups | gmane.comp.hardware.lego.robotics |
|---|---|
| Organization | Biomechanical Bricks |
| Message-ID | <[email protected]> |
I'm not going to finish the Mana Cat. I rather build something else. It was interesting to test out the leg configuration with the Mana. They actually work really well. <http://www.brickshelf.com/cgi-bin/gallery.cgi?f=128009 <http://www.brickshelf.com/gallery/Legomaster/Mana-Cat/thumb/mr-krackle-3-preview-3.jpg_thumb.jpg>>¬ The gearing works well and is strong. The controlability is tricky and is not really precise. Also due to the orientation of each Mana, the leg button control is different. Making it confusing to control because of the 16 different ways the four legs move. <http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1231061 <http://www.brickshelf.com/gallery/Legomaster/Mana-Cat/thumb/mr-krackle-4-mana-cat-spine.jpg_thumb.jpg>>¬ I needed to create the basic body design to test the application. I learned a couple of things when I tested and built the body. Like the spine idea. It works great! Bends fwd/rev. I developed the ankles to "return" to a level position, thus the spine idea was born. I didn't want to create any additional control surfaces, I wanted the Mana remote to be the only control. So no adjustability in the ankles or elsewhere on the robot. Just the Mana driving the legs in an effort to "shimmy" or walk. <http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1231060 <http://www.brickshelf.com/gallery/Legomaster/Mana-Cat/thumb/mr-krackle-3-preview-4.jpg_thumb.jpg>>¬ Really my dismay with this project started with the feet. They do the job, but are not pretty and they look clunky. Plus the rear feet looked just like the front ones. Yuck. Plus, the neck area created issues and I had difficulty making the kind of components I wanted. They would have required additional motors and sensors. Items I did not want to add. Plus the whole base of the neck was making it difficult to build. I took a break, and then another and another. Got Builders-Block, then began the head. The head was soooooo cool, I decided it belonged to another Mecha. I created the face of a new robot, added a pilot, installed nifty new trans 2x2 LED bricks from HiTechnic (eyes), added the motors and gearing for the head up/down tilt, added the motors and gearing for the left/right pan over the course of this past week. Last night I completed the main shoulder actuation for the upper most fwd/rev joint. I will go to the studio tonight and work on the shoulder splay. All black technic and plates, heavy gearing, z8 to z40, dual high rpm motors, z24 worm driven. <http://www.brickshelf.com/cgi-bin/gallery.cgi?i=1138347 <http://www.brickshelf.com/gallery/Legomaster/Things/thumb/find-the-ball-joints-4x5feetlong.jpg_thumb.jpg>>¬ So the robot that will come about from this project is a more like a promise I kept to myself; complete the <http://www.brickshelf.com/cgi-bin/gallery.cgi?f=4473 Super Mech Bot>. The new robot will look like what was originally intended; an elongated hexapod - like the <http://www.brickshelf.com/cgi-bin/gallery.cgi?f=99659 RG Mech>.¬ I now need two more Mana Units. Anyone? Each leg will have a Mana so the legs can do neat things, while sporting a fully motorized armature on top. My camera charger is messed up, so until I take pictures, so long Mana Cat. The kitty that almost never was. Thoughts? or more dead air, share your ideas, contribute. e <http://www.lugnet.com/~1051/ <http://www.brickshelf.com/gallery/Legomaster/Contact-me/legomaster-icon1-w88-h31.jpg>>