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Thread: Team Kaizen - Kaizen

  1. #121
    Ocracoke's Avatar
    Team Kaizen

    Status
    Offline
    Name
    Michael
    Robots
    AW: Osu, Ikari, Ramu / BW: Shu!, ??? (planning) / FW: The Honey Badger / MW: Kaizen
    Location
    Somewhere on the Wirral
    Posts
    757
    So I've had time to examine and start mending the damage to Kaizen and the long and short of it is that the drivetrain needs overhauling. Gimsons, as a complete package, are lovely but the wheel hubs are too soft and the three I have tried to get off I can't. I assume the 4th one is the same.

    To make matters more complicated, the front right motor seized up and that caused the rear right motor to overdraw and now when it spins up, it explodes into a shower of sparks and smoke. I think that had the front motor not done this (bearing in mind, the front motors are from The Honey Badger 2.x and 3.x) and the hubs were made of steel, not aluminium alloy and the motor had a hole for a roll pin rather than a grub screw, this wouldn't have happened. Lesson learned.

    So if I can't get the hubs off without mangling the shafts, I am planning on building a single stage gearbox for each corner with a set of brushless inrunners (something like this: https://hobbyking.com/en_us/turnigy-...-inrunner.html) with a 4.08:1 reduction. I would prefer to have some outrunners if I can find ones that are < 50mm high and can cope with 8S LiPo but I can only find 6S. Then again, it is independent 4WD so... that might work. If needed, I can try for a two stage box.

    EDIT: Yeah... with that reduction and that motor specifically, its still > 10,000 RPM as a output drive. With that motor, a two stage is needed.

    Long and short of it is that I don't think it'll be ready in time for Chelentham so it may have to wait until the start of the 2019 season, showing up at wherever EXR has the April event.
    Last edited by Ocracoke; 1st October 2018 at 18:50.
    Team Kaizen

    AW: Osu, Ikari, Ramu
    BW: Shu! (Build Thread)
    FW: The Honey Badger (Build Thread)
    MW: Kaizen (Build Thread)

  2. #122
    Roboteer

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    Name
    Tom
    Robots
    Son of a beach
    Location
    Henley on Thames
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    20
    If you want 8s use 2 4s in series

  3. #123
    Ocracoke's Avatar
    Team Kaizen

    Status
    Offline
    Name
    Michael
    Robots
    AW: Osu, Ikari, Ramu / BW: Shu!, ??? (planning) / FW: The Honey Badger / MW: Kaizen
    Location
    Somewhere on the Wirral
    Posts
    757
    I do already :P 2x 4S1P 4200mAh LiFe batteries wired in series. The axe is a similar affair with 2x 3S1P 2100mAh LiFe batteries.

    What I meant was that I wasn't able to find 8S Outrunners that fit within the 50mm clearence (unless I missed something when looking last night). However, happy to run 7S or 8S Inrunners for the same effect, it won't be as if it'd be lacking in pushing power if 4x 775 motors can shove ~80kg around
    Last edited by Ocracoke; 2nd October 2018 at 15:38.
    Team Kaizen

    AW: Osu, Ikari, Ramu
    BW: Shu! (Build Thread)
    FW: The Honey Badger (Build Thread)
    MW: Kaizen (Build Thread)

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