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h3X

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About h3X

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  1. h3X

    Daredevil's first wheel...

    I don't have the disposable income to go through five wheels... So I better get it right the first time. Sounds like I should just get the XL and ask my wallet for forgiveness later...
  2. h3X

    Daredevil's first wheel...

    Did you hear about anyone actually having an issue with the store or is it just hearsay? I live in Oslo so I'm planning to take a trip to Drammen and visit the store when my schedule allows. Do you ride in fall and winter? Where do you live?
  3. h3X

    Daredevil's first wheel...

    I will probably try to take it off road and play around with it, but that capability is not strictly necessary. I want a wheel I can commute with as much of the year as possible, as well as take it on group rides and go scary fast some times. Maybe many times. It needs to tackle hills very well because I live on top of a long, steep one. So basically, I want speed power and range. I suppose that means I should go for the 18XL, but that's a lot of money...
  4. h3X

    Daredevil's first wheel...

    That being mentioned, I do want to buy at the beginning of summer so I can learn to ride in the vacation season and when it's warm outside! Better learn on pavement before the snow arrives... Does anyone else have an opinion? Do you think I'd outgrow the 16S? Can that one do off-roading?
  5. h3X

    Daredevil's first wheel...

    Safety first, which is why I want something that has a good margin on top of the speeds I want to go... When is the 16X coming out?
  6. h3X

    Daredevil's first wheel...

    Hello everyone! I've been lurking around the forum and absorbing all I can from youtube in the last month or so, and I'm plannng to buy my first wheel in June. I am 100% decided that I want a Kingsong because of the superior build quality and good brand reputation. I come from esk8 where I've made my own diy board. I love fast group rides and pushing my limits on steep downhills. This means I would probably outgrow anything below 35 kph as soon as I can ride without falling. I usually can't afford much, but about once a year I get tax returns and vacation bonus, so I thought I'd splurge on a wheel this summer. I've found a local store that offers the KS16S, KS18L, and KS18XL for prices of respectively €1255, €1670, and €2090. The Gotway MSX is also on offer for the same price as the 18XL. I can possibly afford the most expensive, but only if I can justify it to myself (and the wife). I know someone is going to say I should buy from ewheels, but that means I'm going to have to add shipping and import duties to the price (and the wait!!). I can't justify spending several hundred euros on a kids' wheel I'll outgrow any time soon, so I'm looking for advice. Are the prices good? Which is the best value for the price at these prices? Is it worth spending the extra money for a better model? Are 18 inch wheels really unwieldy / lack agility? I am going to visit the store in a few weeks to test ride different models (and fall a lot) so I may get a better feel for what fits me. Edit: I just wanted to add that I don't mind a few scuffs and scars from learning, so that's not really an excuse to get a learner wheel first... Edit 2: I'm about 90 kg and 190 cm
  7. It was more a suggestion than a question, but thank you for the response. 🙂
  8. h3X

    Open-source EUC motherboard

    In my own experience, the sensorless algorithms are generally less efficient (and a lot more noisy!) and we should definitely use FOC. Matlab's YouTube channel has a decent introduction to its requirements. I suppose the motor driver is the only board that needs Hall sensor data from the motor. Should there be a rotary encoder or another way to sense the wheel angle or does the IMU provide all the needed data? Regarding CAN, I see the problem with data overhead and lag, and that is definitely something you'd want to avoid in a time critical task like balancing the EUC!
  9. h3X

    Open-source EUC motherboard

    If the motor is sensored it can report rotational offsets that may be helpful to a control processor? I'm thinking that we should use an established protocol for communication unless we only need very basic signals. CAN bus comes to mind as it's already a standard between sensors and controllers in cars and many other applications, and is flexible towards software based expansion.
  10. h3X

    Open-source EUC motherboard

    It's a good point, pst. It would be best if we end up with a collection of black box devices that are interchangeable. That being said, the coding is being done on STM32 for now.
  11. h3X

    Open-source EUC motherboard

    I probably don't need the Rockwheel BTLE module if I have the other one?
  12. h3X

    Open-source EUC motherboard

    I already have an arduino, but not an stm32 dev board. Do I also need an mpu6050? What is the black board in the upper left? I'd love to help out with anything during the summer, after my exams are done!
  13. h3X

    Open-source EUC motherboard

    Here are two books from the library (with ISBN page)
  14. h3X

    Open-source EUC motherboard

    I'll visit the library tomorrow and look them up for you. They have pretty generic names like "introductory control theory" or somesuch... Edit: Here's a book I own on the topic, but it only covers electronics and not control systems engineering as in algorithms and mathematics.
  15. h3X

    Open-source EUC motherboard

    I have been looking around the university library and found some books on control theory that are interesting, and some even use the inverted pendulum as an example. While I'm busy with exams right now, I want to build an inverted pendulum to get more familiar with the practical solutions and all the little niggles that aren't mentioned in the theory books. I've also decided to get a commercial wheel (looking at ks16s). That way I can get sensor data from an imu that certainly would help tuning a controller later.
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