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The_Icestorm

Eurobricks Vassals
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Everything posted by The_Icestorm

  1. The_Icestorm
    Time for another update. Been working on the lifting mechanism. Able to lift whole structure up and down by a considerable angle using 2 linear actuators. The battery boxes at the end of each arm are filled with batteries as counterweights. Also managed to motorise the outer ring via some convoluted method using u joints. Honestly its better than using gears, and it works quite well, so I think I'll leave it like this. Gif of all 3 rings moving at once: The inner ring isn't actually powered in this video, it moves by itself due to the rotation of the other 2 rings. While it's not ideal, I might consider not motorising the inner ring if issues occur. Next up is reinforcing the whole structure.
  2. The_Icestorm
    I love the use of the rims. Some hubs would make it really look good! Interesting to see that people are converging on recreating certain rides, like you/mocbuild and myself/shadow_elenter.
  3. The_Icestorm
    I like the inner passenger seats! I guess we will have to see how different our builds are at the end, I wish you good luck with building!
  4. The_Icestorm
    I'm not entirely sure about the geometry of that mounting system (it was just a quick way to get the motors on), but geometry wise it looks close enough to be viable. Strain might be a problem, I don't see a good way of attaching another mounting point to secure the motor. Also what is this 'big EV3 robot' you are working on? Sounds like a large project...
  5. The_Icestorm
    Another update on the build. Finished making all 3 rings, replaced some of the structural O-frames in the outer ring with dark grey beams to fit the colour scheme better (rings are still very structurally stable). All the power transmission system in the rings is also installed. I also had to increase the overall reduction via the bevel gears to decrease the torque necessary to operate the system smoothly. Hooked up the system to some EV3 large motors to test out the inner rings spinning. I'm pretty happy with the result so far.
  6. The_Icestorm
    Update post. Due to space constraints, I've decided that my original plan of having a 3x3 cross section for all 3 rings is too small, so I've redesigned some things and bumped it up to a 3x5 cross section. This allows for more room for motion transfer axles/gears, as well as making it easier to reinforce things. Pic below shows the new 2 outer rings vs the original middle ring. At the moment the middle ring can move independently, controlled through one of the grey axles sticking out to the sides (the other grey axle controls the innermost ring). The outermost ring rotates via the turntable. Due to the larger size of the rings, I found it was easier to transfer motion via bevel gears rather than u joints. Overall there was surprisingly little friction in the system, which means I should be able to get a smooth and accurate rotation of the final structure. I may need to decorate the rings with more beams or technic panels to keep the colour scheme consistent (I don't own a lot of system pieces). I want dark grey for outer, light grey for middle, and black for inner.
  7. The_Icestorm
    Had a look at it, looks pretty similar to what I have in mind. I probably won't be using gear train system to transfer motion though, due to my lack of pieces, and the rectangular nature of the rings. U-joints sond like a better idea for this design. At the moment, I aim to make each ring's cross section 3x3 studs. The black ring I made is approximately the size I want for the middle ring. I don't have any AAA battery boxes on hand, or IR receivers, so thats not really an option (I also have a lack of PF motors and cables). Besides, I like the idea of the ride automatically operating via Mindstorms, so I think I'll stick with that. Uh oh, judging on your previous builds, it looks like I have some serious competition now . Can't wait to see what you come up with!
  8. The_Icestorm
    I thought I might try to replicate this ride design for this contest. The ride consists of 3 spinning 'rings' with the riders attached to the innermost ring, and the ride rotates them around 3 axes. Some functions I want to include in the ride: Independent motorised control of each spinning ring. All motors external to ride, using a Mindstorms EV3 controlled system. Whole ride raises and lowers to allow riders to get on and off (like in the video) As I want all the motors to be external to the ride (having motors attached to the rings will cause wire entanglement issues) I have to somehow transfer power through the rings to spin the inner ones. Here's a diagram showing how the power will be transferred to spin up the inner rings. Red line is power transmission. Some pictures of the middle (green) ring and a basic mounting frame (not final). Black axle is input and tan axle is output.
  9. The_Icestorm
    Would rollercoaster carts (or similar objects that transport people on rides) count as 'trailers' in this context?
  10. The_Icestorm
    9: 1010: 67: 42: 311: 213: 1
  11. The_Icestorm
    This is super cool! Love how you fit so many functions in such a small space.
  12. The_Icestorm
    Thanks! I hope to do more builds more often now, although maybe not as frequently as before.
  13. The_Icestorm
    Already disabled her neurotoxin and turret production, I'm prepared :)
  14. The_Icestorm
    This is a recreation of the robot character GLaDOS from the game 'Portal', using Technic and Mindstorms. Just to answer a question some of you may have: Why Mindstorms? Why not PF? Well for a start, I don't own that many PF motors (only got 2 medium motors and 1 XL motor), and secondly, I don't own any PF IR receivers or remotes. The mindstorms kit has its own IR sensor and remote, so I used that. Functions: 1. Head elevation controlled by EV3 large motor 2. Head rotation controlled by EV3 medium motor 3. Body elevation controlled by EV3 large motor 4. Body rotation controlled by EV3 medium motor These may not be very many functions, but they allow for most of GLaDOS's movement seen in the actual game. The range of movement is quite reasonable. Regarding aesthetics, I don't own a lot of LEGO pieces, so the model may look a bit incomplete or strange in some places. But I think I did an OK job with what I had to work with, especially the head. Some more images: Video: More info about the robot can be found here: https://www.us.lego.com/en-us/mindstorms/community/robot?projectid=d1208d08-db8f-421c-9aa7-5f618912d7b0
  15. The_Icestorm
    I have a few questions: Are Mindstorms allowed to be used on the vehicle? The rules do state that PF and electronics are allowed, but doesn't state whether Mindstorms can be used. Also, can you build a vehicle that has 2 modes of transportation (including wheels)? For example, can you have a car that drives like a normal car on wheels, but can retract the wheels to be able to walk on legs hidden underneath?
  16. The_Icestorm
    I haven't modified any of my pieces yet, but I've managed to destroy a ton of black pins when forcing in pieces or quickly taking apart models. Sadly, all those pins made their way into the bin; there isn't much you can do to the pins that would make them useful.
  17. The_Icestorm
    Standing 58cm tall and 59cm long, this AT-AT from Star Wars is probably my largest robot to date. It is controlled by an EV3 p-brick, and is capable of walking, turning its neck, and shooting balls from a twin-ball launcher located inside its head. Here is a list of the functions of the robot: - Walking: 2 EV3 large motors - Neck turning: 1 EV3 medium motor - Shooting: 1 NXT motor Also includes an EV3 IR sensor for use with the EV3 IR remote. After getting the BWE, I had a plentiful supply of grey beams and panels, which I used in the aesthetics of the model. The head design was the most tricky part of the build. I needed it to look good, while at the same time have enough space for the twin-ball shooter with magazines. However, I'm happy with the end result, as it looks quite accurate to the actual thing. With the amount of pieces I had, I was also able to achieve a (almost) full body cover, which although adds to the weight of the robot, looks really nice. There are also two flaps on top of the head that can be lifted up to access the ball magazines. Walking was especially tricky to achieve in this model, as it was so top heavy. Rubber bands had to be used to help pull in the legs when they bore the load of the robot, otherwise the motors would not have enough torque. All legs are controlled simultaneously by the two motors, so the robot theoretically can't turn. However, I doubt the robot could turn even if the two sides could be controlled independently, since it is so top heavy. The EV3 brick can be accessed through opening of the panels on the side of the body. This was the easiest way to access the electronics while keeping a full-body cover (The real AT-AT in the movies also had opening side body panels). Here is a video of the AT-AT walking, turning its neck, and shooting. More information about the robot can be found here: https://www.us.lego.com/en-us/mindstorms/community/robot?projectid=afba4def-3b6b-49f3-8e0f-f964224763d9 Hope you enjoyed this robot!
  18. The_Icestorm
    I created this modified Bucket Wheel Excavator some time ago, and I thought I would like to share it on this forum. After building the original BWE, I wanted to try to incorporate some Mindstorms functions into it. I managed to motorise all the active functions, using both an EV3 brick and motors, as well as some PF motors. Functions can be preprogrammed, or can be remotely controlled using an EV3 IR remote. Here is a list of the functions: Bucket wheel rotation and main conveyor belt - PF XL motor Lower conveyor belt - PF medium motor Boom arm elevation - EV3 large motor Lower conveyor swivel - EV3 large motor Superstructure rotation - EV3 medium motor Driving - EV3 medium motor Since I owned an NXT as well, I used it to motorise the small mining truck that was included in the set. There are also some LEDs that illuminate the 'work area', but they don't really do a good job, its just a nice thing to include. Here is a video of the excavator in action, as well as the mining truck (sorry about the poor resolution and bit rate): More info about the machine can be found here: https://www.us.lego.com/en-us/mindstorms/community/robot?projectid=3e125a5b-475c-4a4c-b3ed-e4b4f2192907 Let me know what you think of it in the comments!
  19. The_Icestorm
    Nice setup, everything looks nice and compact, as well as sturdy. Can't wait to see the finished thing! One question: how much clearance is there between the ground and the wheel-frame?
  20. The_Icestorm
    I do wish I did own one, but I don't.
  21. The_Icestorm
    I have around 10000 TECHNIC pieces total. And I thought that was a lot...
  22. The_Icestorm
    Probably will say the 5x7 frame. Super useful if you want to build large structures.
  23. The_Icestorm
    I managed to create a MINDSTORMS version of the BWE, a few months ago. The model uses an EV3 brick and PF to control the BWE and an NXT for the mining truck. 2 EV3 medium motors control the drive and super-structure rotation, and 2 EV3 large motors control the boom-arm elevation and lower conveyor belt swivel. A PF large motor controls the main conveyor/bucket wheel, and a PF medium motor controls the lower conveyor. The truck is driven by 2 NXT motor, one for drive and one for steering. More info here: https://www.us.lego.com/en-us/mindstorms/community/robot?projectid=3e125a5b-475c-4a4c-b3ed-e4b4f2192907
  24. The_Icestorm
    Yet another amazing creation from Sariel!
  25. The_Icestorm
    I'm pretty sure it was around 5 hours, maybe a bit closer to 6 hours. I probably would have spent maybe 30 mins total sorting out the pieces beforehand, which allowed me to find parts easily. And you have to remember that some pieces take shorter to place than others, such as black and blue connector pegs.
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