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Thread: New humanoid

  1. #11
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    Re: New humanoid

    Some good news:
    Using a Hitec HP-20 servo programmer, I managed to revive all the digital servos and even the analog 645MG's! While I was at it, I turned on protection, which will halve the motors output in the event of a stalled situation and enabled 180 deg rotation instead of the as-shipped 60 degrees. Best $26 I ever spent!

    Going through the old threads regarding PLM designs. I have settled on one easy enough for me to hack together in the garage using the basic hand tools at my disposal. So here's what I'm shooting for. The 45 deg brackets are Lynxmotion SES offset brackets I plan to drill holes into to allow attachment of the parallel link. I have not yet decided if the twin knee servos will be necessary as I am using HS-5990TG's for the upper and lower links.


  2. #12
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    Re: New humanoid

    I am loving your selection of the gearshift knob/head for your bipedal. Can't wait to see pics of machined out with some LEDs in the eyes...
    ---
    Sleep? You don't need sleep...

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  3. #13
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    Re: New humanoid.

    Full-size leg mockup


  4. #14
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    Re: New humanoid

    Thank you mannyr7! Had a rough day today and seeing your bot's 'peg leg' made me lol Even with your bot a bit behind the prototype, that leg looks to be pretty dang tall! If those brackets are any indication, it also looks like you're changing the layout from what you'd drawn (post #11)?

  5. #15
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    Re: New humanoid

    HaHa! I though it was funny too. The wife, whose bot it has become, wasn't quite so amused with my never-ending 'upgrades'.

    As for my design, nope, still the same game plan as before. I have 8 of those aluminum tubes to machine to complete the legs. Trying to figure out solidworks at the moment, so I can import them into surfcam and then on to the cnc.

  6. #16
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    Re: New humanoid

    Machining complete on the PLM leg sections. Quite a while ago. Just been sitting in a box waiting for me to put everything together. I found out I'll need to make a small counterbore to clear the bearing nut opposite the servo horn.
    Click image for larger version. 

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  7. #17
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    Re: New humanoid

    Click image for larger version. 

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    That is my custom robo controller for the new(old) bot. LOL. SB Freeduino with a proto-shield and Parallax X-Bee breakout board and Mini Maestro servo controller all fit in a standard Arduino case. Everything tested and working, including audio and LCD message output via a 3-pin port north of the Xbee. Just waiting to get off my lazy ass and write code for the sending unit, which is an old R/C helicopter controller, with it's transmitter swapped for an Arduino/X-Bee. New legs! PLM setup on the backburner for now, because there's no way to guarantee a slow transmission or garbled message won't let one servo move faster than another and tear the whole leg to shreds. At $125 a pop, not willing to risk it...
    Last edited by mannyr7; 04-27-2013 at 04:17 AM.

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