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Thread: Featherweight Horizontal Bar Spinner

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    Ocracoke's Avatar
    Team Kaizen

    Hey there, welcome to the forum!

    Personally, I'd make it wider. Having the motors go through a belt/chain drive when they've already gone through a planetary gearbox is a little redundant (in my opinion) and adds another failure point.
    Team Kaizen - Build Diary for all the robots

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

  3. #3
    welcome to the forum. I have three suggestions. 1) don't build a spinner as your first robot they are very dangerous and unforgiving. 2) change the name as Team Titanium (big nipper) has made spinners in the past with either the same name or very similar. 3) get an internal layout first (drive weapon motor key bulkheads) first before getting too far into the design. also, bear in mind you may need to repair it in a hurry so making something hard to access is going to make you stressed

  4. #4
    Hi Josh

    Of the options you've listed the one I'd recommend most is redesigning the chassis. One issue with the Carbide/Tombstone style bar spinner is you have to sacrifice a large portion of your internal space for the weapon as it spins. Also keep in mind you will still need room for a weapon motor as well as the electronics. If you're desperate for space you could mount the wheels externally.

    Changing to smaller motors is also a viable option, if you haven't bought the 45E's already. I use common HRS-550S 18v drill motors (Gimson sell them too) & they haven't let me down yet, even when the rest of the bot was falling apart around them.

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  7. #7
    Grab a VIP ticket ASAP then you can have closer look

  8. #8
    Ocracoke's Avatar
    Team Kaizen

    Indeed, grab a VIP ticket so you can have a tour of the pits. It is worth the money. For what it is worth, my first iteration of my featherweight was 36cmx36cmx22cm (length x width x height). With a robot of that sort of dimension, it is worth laying out the components in cardboard, as you say. It is also worth noting that unless properly planned out, wiring is a pain in a small robot like this.

    However, I am going to second what Mark said. Spinners are dangerous and having had done a spinner as my first robot, even as a low power variety, I've had spinner arms/tips fly off at speed, not a pleasant experience to put it mildly. You can't really test a spinner either in anywhere else other than an arena either simply because of the dangers of them exploding. There is also the problem of the live events (thinking of Robots Live! here) not always accepting spinners because of the arena not having sufficient protection for them. Extreme Robots can handle spinners, as can RoboChallenge (who do the FW Championship at the moment) but Robots Live! can't so it does limit the number of events you can go to.

    I was pretty sure I was being dim when I suggested adding a belt/chain when there's already a gearbox but I wasn't sure.
    I mean, you could use a 1:1 belt or a simple 1 stage 1:1 gearbox but as I noted, it adds another failure point and more weight/complexity. With that said, You could offset the wheels to allow for this.
    Team Kaizen - Build Diary for all the robots

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

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