Tag Info

Hot answers tagged

6

Assuming that you're asking about the engine in particular, it seems to be a large number of pneumatic engines that have been coupled together in order to supply the required torque. LEGO pneumatic engines typically consist of a pneumatic cylinder driving a crankshaft. Here's a basic picture to give you an idea: The shaft usually also controls a pneumatic ...


6

This seems pretty much bordering on the impossible, given the current state of (LEGO) engineering capabilities. What you are describing is a Von Neumann Machine and as far as I know nobody succeeded in creating one, not just in LEGO but in general. The problems you'd have to overcome: The robot must be capable to exert sufficient force to overcome the ...


5

Mathematically, the largest driver wheel you can buy for LEGO is Big Ben's XL driver, with a diameter of 36.8mm. To reach 10 mph, that wheel will have to spin: 36.8 mm diameter -> 115.6 mm circumference -> 7.2 x 10^-5 mi/revolution -> 2320 RPM (!!) This means that you have to gear up a motor to run at 2320 RPM. An XL PF motor with no load spins at about ...


3

You need to ensure that your program has a way to stay alive (wait block, wait for sensor, etc...), otherwise as soon as the program ends all motors are stopped.


3

The basic LEGO Power Functions motors (M, L, XL) use a fairly standard DC motor internally. The terms synchronous and asynchronous only apply to AC motors. I'm not sure exactly where you are headed with this question, but if you are curious about whether or not PF motors can be controlled directly from a simple voltage source, the answer is yes. You don't ...


3

In EV3, use a negative number for the power to go backwards.


3

10 mph (16km/h) is a crazy speed at that scale [citation needed]. Chances are quite high that your car will derail even on straight lines. Now, is it possible to reach that speed using lego motors and lego pieces ? I'd say no, but I think you can get quite fast, in the magnitude of 10-12 km/h (6-7.5mph). As stated in another answer, using the bigger train ...


3

Unfortunately it's direct drive so gearing it down really isn't an option. That leaves changing the electrical system. What battery are you using? Fundamentally, any change to the electrical system is going to amount to "use a half flat battery", and if you're using a high-voltage battery now the easy option is to switch to lower-voltage rechargeable ...


2

Aside from the mechanical enhancement, you could also apply more electrical power to the motor. Some LUGs achieve record-breaking train speed by doing just that, although they usually use custom rails as well as transformers. Of course, overpowering motors isn't usually recommended; and for a PF one you'll have the issue of embedding a larger battery; but ...


2

We experimented with the invert motor block at the beginning of this year's FLL season with disappointing results. The invert motor block only worked with the large motor block and not the move steering or move tank blocks. Use a negative number in the power field to go in reverse.


2

LEGO Power Functions would probably be the most suitable option. You could use a PF M-Motor (8883) combined with a PF AAA Battery Box (88000) which has a two-way switch and is more than capable of powering four medium size or two extra large motors (each item sold separately).


2

Is there anyway in which I can use 1 motor for efficient/quick movement while turning left and right? Yes, if you use one motor to drive a wheel and another to steer the vehicle. Using an NXT motor for steering would be quite wasteful however, you should at least use gearing to convert the jittery, fast movement of the NXT motor into slower, more ...


2

I agree with HaydenStudios, it is impossible to disassemble completely NXT motor without breaking the orange axle hub. You can nonetheless half-open it enough to see what's happening inside (you need a Torx screwdriver - T10 size if I remember well - to open it. See photos here http://philohome.com/nxtmotor/nxtmotor.htm. Anyway, first try to see what LEGO ...


2

If the original train motor is not fast enough, you could build your own engine using normal PF motors and use gearing that is suitable for your needs. Then drive your train via stand-alone train wheels:


1

The clicking mode means that you need to reload the firmware on the NXT (under the Tools menu in the NXT software). If you still get the overcurrent shutdown using different cables and different computers, then the conclusion has to be that there is something wrong with the NXT itself. The USB port should be drawing little to no current at all since the NXT ...


1

If the one motor exhibits the same behaviour on any port with any cable and the other motors are working on all of the ports with any cable, then it is safe to say that the problem is definitely with the motor itself. Make sure you swap cables as well as motors to rule out a faulty cable. Also, check for signs of corrosion on the pins of the cables, motors ...


1

When my train was flying off the tracks, I solved the problem by adding more cars to it, or adding extra weight to the existing cars.


1

You can switch 4 pairs of gears on each end of the crawler (2 pairs in the portal hubs and another 2 pairs inside the gearbox infront of the motor) do this on both ends or you run the risk of broken gears or premature motor wear. I ran 12 tooth gears all the way from the motor to my hubs for a dramatic increase in speed however the torque suffered severely, ...


1

I suggest using google to search for them. When I did that I found two threads on EuroBricks discussing this - here and here. The first thread links to a youtube video that has downloadable instructions. Note that the instructions are 19MB and the website is fairly slow.


1

Procedure as follow, uninstall libusb_win32 driver; not disable activate back NXT fantom driver transfer MotorControl22.rxe with NeXTTool or TransferMotorControlBinaryToNXT.bat execute install-filter-win from directory libusb_win32/bin for USB NXT connection it work for me


1

In NXT-G if you place a block after another block it will run in succession. To get two motors running at the same time you can place two motor blocks, one at the start and the other just above or below. Drag the sequence beam (the white Technic beam) to the second block to complete the circuit. Don't forget to make sure the motor blocks are controlling ...


1

It depends on the programming language, but assuming you're using NXT-G then the Move block may be sufficient. The Move block is designed to coordinate 2 motors so that they both rotate at the same speed over a distance. The Move block has settings for speed/power of the motion. There is a forward/backward setting. There is also a steering setting, which ...



Only top voted, non community-wiki answers of a minimum length are eligible