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hexcrawler's legs wont move — Parallax Forums

hexcrawler's legs wont move

T. BradshawT. Bradshaw Posts: 6
edited 2007-09-12 20:03 in Robotics
Hi every one i am new so i might sound weird.
My hexcrawler's legs won’t budge even though they have power to them. The BOE and PSC are communicating but nothing moves when i run a program.
Do any of you have any ideas as to what could be causing that?
·
······ Thanks
····· Taylor

Comments

  • FranklinFranklin Posts: 4,747
    edited 2007-09-10 02:59
    Well, I would say you did something wrong when you hooked things up. what does debug say you are sending to the psc? Are your grounds connected together? do you have enough power to the servos? How about some help here?

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    - Stephen
  • T. BradshawT. Bradshaw Posts: 6
    edited 2007-09-10 19:38
    The debug says nothing. The 7 segment LED and the 2 pushbuttons work. But when i run a program the PSC's green light blinks and nothing moves.

    Thanks Mr. Stephan,
    Taylor
  • FranklinFranklin Posts: 4,747
    edited 2007-09-11 00:50
    What code are you sending to the PSC?

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    - Stephen
  • T. BradshawT. Bradshaw Posts: 6
    edited 2007-09-11 11:20
    i have sent "Tune the HexCrawler" and "Demo walking code".


    Taylor
  • T-manT-man Posts: 24
    edited 2007-09-11 15:52
    Taylor,

    I had similar issues when I attempted to get my quad crawler moving.· It may be a mechanical problem.· Are your connections at all joint locations loose enough to allow for leg movement?· This would be my first consideration.· If the bolts are too tight, you'll burn your electronics out for sure.

    t-man· roll.gif
  • T. BradshawT. Bradshaw Posts: 6
    edited 2007-09-11 22:42
    Thanks T-man

    That never accrued to me. But yes my joints are loose enough to move.

    Taylor
  • GrievousfishGrievousfish Posts: 54
    edited 2007-09-12 09:28
    Taylor - have you tried sending a simple progam loop that would send a centering pulse to just one of the servos instead of a whole program code to see if that gets through?

    Sorry I am not that familiar with Crustcrawlers - I have Lynxmotion's walkers. If your hexcrawler's board has jumpers that are used for different set ups like Lynxmotion crawlers do, you might want to check your jumper settings.
  • T. BradshawT. Bradshaw Posts: 6
    edited 2007-09-12 14:01
    Please describe jumper settings and how change them. Do you have a simple program that you can send me to test 1 leg?

    Taylor
  • GrievousfishGrievousfish Posts: 54
    edited 2007-09-12 16:59
    Taylor - sorry! Like I said, I don't have the Crustcrawler line of products so I don't know for sure if you even have jumpers on your boards. You will need to review the documentation that came with your walker to check that. As far as a code to check your servo, typically you just need to know which i/o the servo is connected to and loop it a PULSOUT command of 750 with a PAUSE of 20. If you had a servo connect to the #12 I/O port the code would look like:

    DO
    PULSOUT 12, 750
    PAUSE 20
    LOOP

    Sorry I can't be of more assistance. Have you not been able to get any assistance from Crustcrawler with your problem?
  • T. BradshawT. Bradshaw Posts: 6
    edited 2007-09-12 20:03
    That’s fine. I am getting a little assistance. They just gave me an address to send it to for testing.
    thanks for the code.
    Taylor
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