Burf2000

Hey there I made this, if I can help please let me know, I coud scan in some pictures for you

Thats a good idea. I am planning to build it in to a simple bot but just not sure yet. I need to test how much weight it can handle. I am thinking of making a cylinder body instead of the normal square. I keep people updated on the progress

Well after planning it in my head via a train journey. I made my own version of the Automatic Synchro drive. I did not even look at a single online reference. This is just a prototype for me to scale up. Quite chuffed, it took around 2 hours to make and is the 2nd thingy I have built in studless.

I will try to explain it, my grammar is not the best. So there is this main axel that can go up and down which changes the gears. Using central fugal forces, the faster the motor spins, the beams on the yellow spinner move out which forces the axel up and thus changing gears. I then put a elastic band on the shaft to bring the axel back down for lower speeds. I take a feed off the motor too to be the output (e.g wheels)

I have a hamster and he is not going anywhere near this.

So I always wanted to build something massive with big wheels and a few weeks ago I posted asking how to make big wheels. Got some great feedback and so built this Not sure what to do with it yet, I thinking of build a robot body on top, just a smallish one (compared to George). My wife said to make it in to a drag car lol. I also improved it a bit since this video so it does not jam. Notice the body is old grey! Gor that stuff is expensive

I built this for a show just for kids to look at, not the most advance thing in the world! Might give some people some ideas. Controlled via a RCX for speed.

There is over 600 pictures and videos of how he built it!

That is very cool, good price to!

I talk to this guy on Skype, he is an amazing builder!

My avatar picture may give you some hints

This years robot had LA's instead of pneumatics (last years) and to be honest I HATE THE CLUTCH NOISE! and the JAMS. For things that don't need much power, I will use LA's because there precision is very good. However for pure power you can't beat pneumatic pumps running 40psi. You try moving a heavy 4ft long beam with LA's, it failed badly! Steam 2010 (67) by burf2000, on Flickr

I am sooo going to build a massive version of this. Imagine a 5ft tall 2ft round version. I could just let it go round the house!

I am sure we will get some more models with pneumatics in 2012/2013. They just made a new pneumatic pump instead of using the smaller old one, I am sure they will use that on more than 1 set.

Sorry I have been lame at getting the stuff to you, I had a show at the weekend. I would be interested in your code if thats ok?

Very cool model, just trying to work out how the turn tables help.

I so need to get some of these!

So right I clarify my response a bit better so I don't get flamed :) While investigating PC to NXT communication I ran in to reports of it being quite unstable and some BT dongles did not work, etc I just read to many bad things (this was around 2 years a go) So I went with using RobotC(Brilliant) and 2 NXT's (master slave) I wanted to have (master, slave, slave slave) but was told that the way bluetooth worked, the switching between slaves could be slow. Anyway I build a large robot (my avatar) that used 2 master slave (1 per hand) which allowed my direct movement of arms to affect the moment of the robots arms. Also trying to get 2 NXT's to connect involved resetting the BT quite often and pairing them both back up. Also had to take the battery out quite often. However there was a extra switch on 1 that would allow me also to use it to drive the robot about (accelerometer). I first noticed how bad BT was via switching modes. All this was was a NXT button on the master and it would show the mode on the slave NXT. Half the time this just did not work and it was not my code (prof coder for over 10 years) Then between the lag of the BT with the lag of the Hitechnic IR link meant that if you needed to stop suddenly, you had to expect it to go forward for a few seconds. This resulted in my large robot driving itself in to a table after 30 mins of the show it was at opening :( This year I used a Mindsensor PS2 controller setup and it was fantastic! I plan to buy a few more!

Very good mate, better than the one I build. Love your idea for the cart.

I have done this, and BT is crap, it was too delayed for me, unstable and poor to connect up. It's quite well known that the BT on the NXT is rubbish.

Oh you great man! I am so going to try and build this when I get home!

OOO very cool, I am in Budapest with work at the mo but once back I sort something out for you

I have always fancied building one of them, did it take long? Very fine example I must say. Someone did a pneumatic one that was rather interesting

That is a good find, very cool!

Me to, very very cool set and your moc is great!