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Thread: Crumbs! (And Friends) - Team Manuva's Antweight Build Log

  1. #11
    Ocracoke's Avatar
    Team Kaizen

    It is looking mighty neat in there, well done! For posts, couldn't you fill in four corners of the print a little and use something like a M2 self tapper to hold a lid down with? To save weight, might be worth shortening the wiring a bit?
    Team Kaizen - Build Diary for all the robots

    AW: Amai, Ikari, Lafiel, Osu, Ramu
    BW: Shu!, The Honey Badger
    FW: Azriel
    MW: Jibril, Kaizen

  2. #12
    Quote Originally Posted by Mr Manuva27 View Post
    Positives


    • Motor mounts fit perfectly


    Negatives

    • Wheel gaps are too tight and exposed
    • Not much extra space
    • Print quality is awful.
    • I absolutely hate it.


    That last point made me chuckle.

    The new Crumbs looks really nice, very impressive. Good plan on using F360 too, I was also a bit incredulous that they let us use it for free!

  3. #13
    Bit late, but Crumbs is done.... kind of. This whole build has given me a new respect for those who have antweights as their "main class", because this has been so awkward and fiddly to build. Probably a large portion of that is due to my design choices, but still.



    Lifter gears have been put in place and the lifter works. The lifting arm itself is just some leftover 1mm stainless steel I have from the toaster on Bread Dead. It doesn't lift much, just kind of waggles. I think the pivot is too far forward to get proper leverage. Looks cute though!

    Had some issues with the gears slipping, but that was solved with a larger lifter axle and printing the servo gear 1mm bigger.

    Printed some top panels, then it was time for a test drive!



    So Crumbs is fully functional. It weighs in at 142g, so may use the final few to redesign the top panels so they print better.

    IMG_20200520_210552.jpgIMG_20200520_204743.jpg

    One final development is that I have managed to get my hands on one of BBB's beta sale of the new Malenki-Nano Rx/ESC, which can drive 3 channels and replace both the Rx and ESC all on one 2.6g board. I'll fit this to Crumbs eventually (key word being eventually. I have a big project to be working on soon. More on that later....), but this will save a lot of weight that could be used for reinforcing the front with more stainless and changing the lifter servo out for an N20 for extra lifting power.


    Link to the Malenki-Nano specs if anyone is interested, they are planning more stock soon.
    https://shop.bristolbotbuilders.com/product/malenki/

  4. #14
    Ocracoke's Avatar
    Team Kaizen

    Looks awesome, well done! I do like the look of the lifter mechanism, even if it isn't the most effective. I guess the only way to test it is to try and lift 150g+. I know Ikari can lift that much with a similar forward pivot, just awkward to get underneath opponents due to the shape.

    This whole build has given me a new respect for those who have antweights as their "main class", because this has been so awkward and fiddly to build. Probably a large portion of that is due to my design choices, but still.
    Indeed, I struggle to build Ants for relatively similar reasons. Takes a few goes with a Dremel and a steady hand to get it right :P
    Team Kaizen - Build Diary for all the robots

    AW: Amai, Ikari, Lafiel, Osu, Ramu
    BW: Shu!, The Honey Badger
    FW: Azriel
    MW: Jibril, Kaizen

  5. #15
    The flipper looks great! Agreed on the fiddliness of building ants. I think the layout will get easier after a few goes but I'm also struggling with the tiny solder pads.

    I saw the nano ESCs on the BBB shop, it'll be good to see your test run. For our ants I've come up with a halfway house using one of these taped to the standard dual-channel ESC. Saves the weight of the wires and connectors at least!

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