oracid

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Everything posted by oracid

  1. oracid
    This series of small videos is ended. The last video, I present it in a new thread for those who are not interested by the "making off»: http://www.eurobricks.com/forum/index.php?showtopic=122127 But do not worry, I come back soon with a new series, with highest stairs and a bigger tank. Thank you for your attention.
  2. oracid
    Don't worry. Be sure that I always keep my free will and my critical mind.
  3. oracid
    Tommy, thank you very much for that answer so complete and well documented. Of course, I expected such a response, it is for this reason that in my video, I am very skeptical. I did not know that the Soviets have used this type of suspension, although significantly improved. I understand your reservations about the horizontal forces acting on the axles, but still, do not you think that this is an acceptable compromise on this scale? Or, finally, do you think I should abandon this solution? I think back to all this more closely watching your videos and your documentation. Thanks again.
  4. oracid
    This time it is not about track, but about suspension. The idea was to make a suspension that keeps the horizontal symmetry of the tank. Usually the tanks are oriented, there is a "front" and a "back", and the suspension is oriented to favor the advance, which could cause problems when the tank goes back. My suspension is not new, but I think, it has never been used on a tank. This is a vertical suspension. For a small robotic tank, I think it will not be a problem. But I know that here there are specialists and would like to know their opinion on this subject. Thanks in advance.
  5. oracid
    Nothing to say. Except this is awesomme !
  6. oracid
    I love your jukebox. Why did you choose to make an ellipse rather than a circle? Don't you think that a circle would be faster?
  7. oracid
    Until now, I have shown what was working. But, as you can imagine, I did other tests that did not work. I think it is interesting to know what does not work. This saves time, unless we want to study the reasons for these failures. The balloons for sculpture: It is these balloons with which one can do all kinds of animals in folding. This seems a great idea. The balloons are thin, they can be cut into slices or braiding on track. But unfortunately, they are very slippery. Too bad, it was very nice. The inner tube of a bicycle wheel: This was my first failure. I was very disappointed. The idea was to cut thin strips of more than one meter in one tube and move them into the holes of the tracks. Unfortunately, if through the plait, the car rides well stairs, he cannot climb the slope because the material is too slippery. Hot glue: The idea was to place hot glue on the sculptures of the elements track. It works fine, but it become very slippery very quickly. The "silent blocks" for door : It is these little buttons that are stuck on the door frame to avoid the noise. This does not work at all, very slippery. Silicone collapsible tube: Too slippery.
  8. oracid
    Thank you all for your support. Indeed, it is too expensive for me.
  9. oracid
    Thank you everybody. As far as I know, this piece is not yet available. Do you have any news ? Of course, I will test it. I hope it will not be too expensive.
  10. oracid
    In this new video, I present the most effective solution, the cheapest and easiest to implement. My only regret, why I have not thought of it before? I always use a D joint, but I cut into slices of 1.5 Lego stud. The diameter is perfect and the adherence is great. At the end of the video, I suggest a store that sells D joint on eBay, for areas in the world this is not usual. Of course, I have no interest with this retailer and there are certainly many others. Thank you in advance for your comments.
  11. oracid
    In this new video I show you how to make a very effective tank track. In the previous version using a window D joint, it come off easily when the tank was rubbing on the floor. In this new version, the new thing is that the D joint is folded on the back of each track link, which gives resistance to all tests. If the D joint double-sided adhesive tape did not stick enough, you must use your own double-sided adhesive tape, applying it only to the back of the track link, as not to create extra thickness on the in front of. Thank you in advance for your comments.
  12. oracid
    Not very nice, but...
  13. oracid
    Your project interests me enormously. In general, reasonable projects do not interest me much. Why do you not persevere in the humanoid with a spinal column like you've already done. There the body looks like a wall and I do not understand where you're going.
  14. oracid
    Here is my working place where I spend most of my time. As some here knows, and as you can see, I am currently interested about tank climber. It's here : http://www.eurobricks.com/forum/index.php?showtopic=119844 Very cozy, isn't It ?
  15. oracid
    Don't worry about XL motors. Look at this : http://www.eurobricks.com/forum/index.php?showtopic=110051 But the lithium battery is sick. I can't anymore modulate the speed.
  16. oracid
    Load testing with a window D joint. The load capacity of the tracks of a tank climber have to be evaluate. For this, I had the idea of using nuts placed on the chassis on blue pins. The window D joint, introduced in my previous video, is a very effective solution. In this new video you will judge its effectiveness with a load of 1500g to which we must add the 800g of the tank itself, a total of 2300g.
  17. oracid
    What do you think of the idea to memorize the location of objects and thus to evaluate the probability of finding an object in the next pass. In this way, it could decide the best way to get from one point to another. Not easy, I presume...
  18. oracid
    The weight is a big problem, but what do you mean by friction balance? Could you be more specific?
  19. oracid
    Your comment is interesting. Note that I said "intuitively". And I am very suspicious about my intuitions. Must be tested.
  20. oracid
    Yes, of course, the weight of the tank has some bearing on the outcome. But already, weight for weight, we see they are solutions that are better than others. Intuitively, I would say that if we want to increase the weight of the tank, then we must also increase the contact surface of the tracks, so their width. I'm making a big tank, a very large tank, and I have some ideas on the issue. Of course, I will come back. For now, I am waiting for material, besides, I am always waiting for material. And I still have many ideas to test. Then the next step will be to double the steps size from 5cm to 10cm ...
  21. oracid
    The idea seems good, as long as each little wheel is not in contact with the previous and the next one. Maybe, can you try to alternate two different wheel sizes. This will reverse the rotational direction alternately. So the larger wheels supporting the plateau turn all in the same direction.
  22. oracid
    Here is the second video of my series on testing of a climber tank. This time I propose a solution that is closer to reality by using window sticker seal. As the elastic, this solution comes at a very low cost. In France, and perhaps in other countries, window seals often have the profile of the characters D, E, P and V. They are found under that name in DIY stores. Here I use a D seal. The advantage of this solution, unlike elastics is that it does not impact the interior of the track and any bearings located on either side of its axis. After some tests, I quickly found that the grip on the incline was not good. So I decided to cut the curved portion of the D. There, the result exceeded my expectations. Note that the material that I used to make the staircase and the incline is not cardboard, but plastic sheets. You should know that these leaves are very slippery. Thank you in advance for your comments.
  23. oracid
    Very good idea !
  24. oracid
    You are a fine psychologist ! Kelkschiz, thank you, you're one of my favorite references for everything related to the tanks. Philo, thank you, greatly flattered !
  25. oracid
    How did you guess ?