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My Penguin is more like a do-do... — Parallax Forums

My Penguin is more like a do-do...

geekythinggeekything Posts: 53
edited 2007-08-06 22:44 in Robotics
Very strange behaviour from my freshly built Penguin...

The Stamp seems to work, I can run the LED test and I can see output from the servo calibration in the debug window. But when I run the centre servo program now that he's built, he has conniptions...and when I run the calibrate program nothing much happens at all.

Any clues?

Thanks.

-marc

P.S: No, I didn't lobotomize him yet! (See my earlier post).

Comments

  • geekythinggeekything Posts: 53
    edited 2007-08-06 15:15
    Apparently you have to connect the stride and tilt servos to the right headers -- I had them transposed [noparse];)[/noparse]

    -marc
  • dandreaedandreae Posts: 1,375
    edited 2007-08-06 17:50
    I take it that you have everything up and running correctly?· If not, please let me know and I will guide you through it.

    Regards,

    Dave

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    Dave Andreae

    Parallax Tech Support·
  • Ken GraceyKen Gracey Posts: 7,392
    edited 2007-08-06 18:18
    Transposed headers is a certain recipe for a do do bird. The tilt movement is more than the stride, so a mix-up could make him strip a a stride linkage or gear in the stride servo as it hits the physical limitation.

    As for your lobotomy, how about the speaker I/O?

    Ken Gracey
  • geekythinggeekything Posts: 53
    edited 2007-08-06 22:44
    Hi Dave and Ken,

    I have everything going well right now. Thank you.

    As for the lobotomy, at first I assumed the 7-segment LED was extraneous. I'm now learning how incredibly useful it is for feedback! I love the way it indicates the next move in object avoidance and I even had a concept to make it show compass measurements...

    So, yes...getting rid of the piezo might be a good idea.

    Have you considered just putting the LED on a shift register? With a little rework of the board layout, you could then put a second set of three I/Os behind the expansion header and folk could go wild [noparse]:)[/noparse]

    I do have to comment the Penguin is beautifully machined! Makes me want to buy a CNC..


    -marc
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