sawyer klegr

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    lego GBC and technic

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  1. sawyer klegr

    [WIP] Lexion Combine harvester

    Looks great already! Just curious, do you think the front tracks will have any issues rolling on hard surfaces if it is not powered? I guess if most of the weight is on the center two small wheels of each then it should not cause any issues?
  2. sawyer klegr

    Lego GBC Closing Forks Module

    Thanks! The arms are only lifted by the tension from the three pins at the end not being able to move any more. Basically the weight of the arms themselves is what cases the pins to close. That is a much better explanation than mine, that is correct.
  3. This great ball contraption uses a series of gears and pins to grab the balls and lift them. The mechanism is quite reliable, especially for a module that I designed. Would like to have made it run a bit faster as it does not quite run at 1bps, but it should be able to run at that speed if it is run on 9v. (it was only running at 7.2v in the video as the batteries are rechargeable) Photos on Flickr.
  4. How dare you imply that most GBCs are not intelligent! ;)
  5. This lego great ball contraption (GBC) module uses a mindstorms ev3 to control a ball sorting and ball counting mechanism. The module was programed using micropython / python. The module keeps track of the ball count, the count to left and right, the ball per second, and ball per minute. Obviously this was programed using python, which presented some challenges. (I am familiar with almost all major programing languages with the exception of python as a result of my computer science degree... ) In the end I decided to use threads for each of the main tasks of counting the balls and sorting by color. It makes it run much better and faster than just putting all the code in t he main program loop. Hope you like the module! (the full code is on Rebrickable if you want it ;) Rebrickable Flickr
  6. sawyer klegr

    Lego GBC Extending Forks Module

    Thanks! Figured I should actually make a reliable module once in a while ;)
  7. 42125 Ferrari 488 GTE 'AF Corse #51 The big red car
  8. That Ferrari looks great! Hopefully will be more affordable than the Lambo and Bugatti...
  9. sawyer klegr

    Lego GBC Extending Forks Module

    Thank you so much! I really enjoyed building it.
  10. sawyer klegr

    Lego GBC Extending Forks Module

    Thank you so much! I am glad you like it. I came up with the mechanism by accident while messing around with the gears for another project. Thanks :) was great fun to build it.
  11. Built another module using a new mechanism, it has two arms that extend half way through the motion to pick up the ball before lifting it to the next module. It is quite reliable and runs better at slightly higher speeds. Would be cool to have two forks on each side, kind of like a "cup to cup" module, however I did not want to do it as it would be much less reliable. Instructions on Rebrickable. Flicker.
  12. sawyer klegr

    Lego GBC Ball Batch Module

    Thanks! It was partly inspired by vending machines and a old clock :)
  13. sawyer klegr

    Lego GBC Ball Batch Module

    ^ That is a great idea! Did not think of using the motor to lift a heavy weight for something like that, maybe could start with a clockwork module so you don't need to worry about waiting for 13 balls?
  14. sawyer klegr

    Lego GBC Ball Batch Module

    You could also just set the weight to trigger at 12 balls to account for any differences between real and "fake" balls. Thanks! Your idea of having the motor turn of while it is waiting is a great idea! I think it could be quite challenging, it might be necessary to have a more complicated mechanism, maybe having the last ball roll off into another part of the mechanism to give it more leverage of the electric switch the motor is attached to?
  15. sawyer klegr

    Lego GBC Ball Batch Module

    Yes, the weight can easily be adjusted. I added some 2x2 round plates to the back of the module for this very purpose. The module can also run faster, as I was running it on only 5V as my rechargeable batteries finally died.