Erco's Figure Eight Challenge

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  • MikeDYurMikeDYur Posts: 1,694
    edited November 2016 Vote Up0Vote Down
    Heater. wrote: »
    Hey, I'm just this guy, y'know.

    Rummaging in my junk box now:

    Propeller - check.
    Motors - check.
    Chassis/Boxes - check.
    MOSFETS - check.
    Sensors - ...

    .... rumage, rumage...ColorPal.... Hmm. That could do it.




    Hey guy's I budged him, we need to pester him a little, or he will put it on a back burner and turn down the heat.
  • Well Heater sure talks a good game anyway... :)
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Booya, EIGHT! Just two more to double digits unless someone breaks my streak!

    As suspected, treads suck consistency-wise. It took several tries and luck to get fairly close in this video. Every test run wears down the alkaline cells (which also suck) and it goes slower. Which means not as far with the simple timing commands used here.

    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Erco,
    I gather your figure 8 is being done withoutthebenefit of odometers .
    Jim
  • Yup, just using timing commands here. Wheels are so much easier than treads.
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • I built up this Feetech 4WD chassis today. Reckon I'll "8" it without anyone interrupting my streak. I done lost track of how many 8's I have in a row. Have to page back sometime.

    1536 x 864 - 378K
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Since two motors on one side are binding, this bad boy will turn best in one direction. The Fig 8 must wait!

    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • ercoerco Posts: 17,679
    edited December 2016 Vote Up0Vote Down
    Laser Trike blazes my ninth "eight" in an uninterrupted row. One more and I'll make it into double digits while everyone's out Christmas shopping! Edit: Updated video

    Still experimenting with speed, sampling and steering rates. The high pitched sound is the beeper toggling every time the sensor is sampled. Those ten-cent beepers are solid gold.



    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • The F8 test is great, the bot looks very animated.

    I need to get another pair of motors for that chassis you gave me. Any recommendations?
  • ercoerco Posts: 17,679
    edited December 2016 Vote Up0Vote Down
    That chassis has cutouts for those specific 9g servo-sized motors. You need more of those? Didja borrow those for another project, blow 'em up, or you just wanna hotrod the chassis with different motors?

    Edit: Or you could get in on my next Feetech order from China and get some bolt-in 9G digital CR servos... I'm sure our pal Gordon wants some too.

    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • You gave me 2, I want to make it AWD. I should probably match what is on there now, got a link to em?

    Thanks.
  • Not readily available, no link. Feetech has a website but most of their robotic stuff isn't even listed: http://www.feetechrc.com/product-category/ft-robot/

    You would think your servo/gearbox would be listed there somewhere but it ain't.

    I email their customer service directly and it takes a few replies and iterations and translations to place an affordable order. Shipping adds up very quickly.
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • 2WD is fine then, it has the caster :)
  • Just tip it up and make it a balancer. Saves 2 motors!
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Great new sensor Sir erco! Saw the demos on your YouTube Channel...

    New title - Erco, the 8th or erco VIII.
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • erco wrote: »
    Just tip it up and make it a balancer. Saves 2 motors!

    Good idea, I'll give it a shot.

  • Hey Whit's checking in. NOW it's a party! Merry Christmas, Boss!
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Here is my humble attempt at a walking figure eight. It is made from Minds-i parts, uses a Propeller Activity board and is programmed in Blocklyprop. Notice the red line on the floor to see the calibration of the figure eight. HEE HEE I DID IT! The Blocklyprop code is attached. You can all tell me how to make it better as I am getting my feet wet with it. Love it too. A lot of fun to use.
    626 x 606 - 59K
    Carol Lynn Hazlett
    carolhaz391@gmail.com

    In the birthing of any machine there is that moment when it actually works. It is always fresh and astounding for me...............Red Whittaker

  • Perfect! Great job, welcome to Team F8C!
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Can't let Carol have all the fun! My new trike bot takes a shakedown cruise. Surprisingly accurate & consistent, even using alkaline batteries & simple timing commands.

    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • PublisonPublison Posts: 9,351
    edited January 19 Vote Up0Vote Down
    erco wrote: »
    Can't let Carol have all the fun! My new trike bot takes a shakedown cruise. Surprisingly accurate & consistent, even using alkaline batteries & simple timing commands.

    That is wicked fast! Good job!
    .


    Infernal Machine
  • ercoerco Posts: 17,679
    edited January 19 Vote Up0Vote Down
    Publison wrote: »
    That is wicked fast!

    Especially since there's no motor braking, or even reverse here. Just PWMing 50% (yes, faster is possible) through a DC motor using a mosfet, so I had to allow for power-off coasting down at the end.

    Ramping the motor down? No time for that!

    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • Wow!
    Whit+

    "We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
  • As Requested, re-posting in this thread.

    I would like to introduce my robot call 'zBot' to the Parallax forum community. I have been working on it as a winter project for a few years. Last winter I started working on an auto-pilot. I needed a test environment and chose the "Figure 8 Challenge".

    The robot I am developing is meant to operate in larger spaces (10 x 10 meters). It was never intended to be used to perform small accurate movements. For me it was an interesting software challenge to coax the auto-pilot to behave correctly at this scale. On my 'Still to Do' list I have now added the need for an "Auto-Pilot 2.0" that will do cursive writing.

    ""
  • Malcolm, I have been meaning to make a comment on your great little robot writers. I'm going to be following your progress, as your robot's graphical interface is very interesting. I wish my cursive was that smooth.
  • Recursive writing is even harder!
    "When you make a thing, a thing that is new, it is so complicated making it that it is bound to be ugly. But those that make it after you, they don’t have to worry about making it. And they can make it pretty, and so everybody can like it when others make it after you."

    - Pablo Picasso
  • I can recursively write this "I can recursively write this "I can recursively write this "I can recursively write this "I can recursively write this "I can recursively write this "I can recursively write this "..." easily." easily." easily." easily." easily." easily." easily.
  • <A> ::= <B><A>
    <B> ::= "I can recursively write this"
  • What language is that?

    It looks like it has a different output to the algorithm I was hinting at above.

    I might guess it would be:

    <A> := "I can recursively write this \"<A>\" easily."

    If we can introduce double quotes with escape sequence as shown.
  • Heater. wrote: »
    What language is that?

    It looks like it has a different output to the algorithm I was hinting at above.

    I might guess it would be:

    <A> := "I can recursively write this \"<A>\" easily."

    If we can introduce double quotes with escape sequence as shown.

    Getting a little off topics guys. Let's see some robotic videos.


    Infernal Machine
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