Meet Marvin

OK so here he is.

We named him Marvin after the famous depressed robot from the hitch hikers guide to the galaxy, perhaps not very original but still, in the end, it suited him.

Here are all the many things Marvin can do. Firstly you will notice there is a simple scoop at the front. This allows the robot to push things across the field mat and into position. The two sticks in the centre of the scoop keep tall, tricky thing in place so we can get the programming more accurate. This scoop also raises so it can be used to lift things and trap things for dragging back to base (which is one of the things he did very well on the day).

When the scoop is raised the two sticks also act as a holder for the bowling ball so it can be launched at the bowling pins.

On the side and back of the robot are two little contraptions that help keep the wires out of the way of the wheels and other moving parts of the robot. One of them is the long stick at the back with all the wires threaded through, the other is just on the side and is only for the colour sensor.

On a stalk at the side is an additional colour sensor which you can see really well in the first two photo's. This tracked along and found the green medicine bottle which was then picked up by the little sticky out backwards bit of scoop you can see in the photo below.

Those sticky out bit was also used to trap the chair and bring it back to base and had the potential to pick up the lower shopping bag. This photo also shows the other important feature really well, which is the other sensors, one colour for finding green on the mat and one light so the robot can follow a line. These are important for accurate positioning on the mat, (although it is interesting to note that the winning team did not use line following at all, finding it too slow). You can also see from this photo that the central sticks fold back along the top of the scoop when they are not needed.

The there is this little stick.

located just behind the front wheels it catches one of the levers on the way past and gives us more points!!

Also there is this little stick 

which can be added anywhere on the scoop to lift levers or pick things up.

So that's Marvin. And that is how we came third in the design. there was only one task on the mat he was not capable of achieving and we know how we would fix that now. Sadly we were unable to programme him to do everything, but then neither could anyone else. It seems you have to choose wisely from among the tasks and work hard to solve those you can, but also keep an eye on the design to make sure it can do more that will be required of it. If you pont this robot at any of the tasks it can do them, its getting there from base, lining up accurately and all within the time and with nervous fingers.

 

The tasks we had to do are in this little video below. It takes a while to watch but for those really interested in the process, then here it is.

 

http://youtu.be/116QPFHygYk

The Big Day

So here we are all dressed up and ready to go!

We had a great day at our FLL tournament. It is so hard to put into words what the experience was like. It was exciting and terrifying and amazing to be a part of. I think this was especially so as it seemed unlikely we would get there at all. The odds were against us from the start as the whole competition is set up for schools and existing clubs who have both financial and practical support to call on. But we did get there and we did it in style.

Following long months of fund raising and team building, learning to work together and how to make up again when we didn't manage it, we finally unveiled Marvin to the world. Marvin is our robot by the way and we will introduce him in a separate post later on. There is so much to tell about the process now it is over and we are no longer competing I am going to tackle it in a few sections over the next week or so.

It turns out that the robot game is a nightmare for everyone. It wasn't just that we were new or inexperienced, the whole thing just has so many variables that a lot can go wrong even for the most experienced teams. If Marvin had done all the things we had programmed him to we would have made the semi-finals but it seems that is not the way it goes at these things. In fact Marvin did very little that was asked of him and yet we came 5th over all in the robot game, just outside the semi-finals. Watching the final was heartbreaking, there was so much at stake as only one team goes through to the next round, some of the parents were quite glad we didn't have to endure it, it was hard enough to watch in the early rounds.

As well as the robot game the team are also interviewed about the design of the robot and the programmes on it, asked to complete a team building task, they have to present all their research, in this case into ageism and plug socket design (more interesting than it sounds). In addition there is a roving interview team who catch team members on the hop during the day. Laurence did us proud despite having the flu as all the others were on rides somewhere in the Lego centre.

We know we came third in the robot design category which is extraordinary for a rookie team but we are waiting for the centre to locate our score sheets and send them to us before we know how we did on the rest of the criteria.

We must have done OK because we were awarded a judges commendation award which we think means they likes us a lot, we were good, but there were others better than us. It's also a means of encouraging us. It's worth having another go - a kind of you did really well and we want to give you something trophy. So here it is...

and here we are with it...

 The purple monster in the photos was a last minute mascot addition. He was named by the team and one of the judges as Mad Dr. Squeekums and if we do try this again I'm sure he will be a fixture in the future.

After all the excitement was over we went back to Maria's house for a post match party, unfortunately most of us were tired and a few team members were quite poorly on the day so it turned into X-box and Pizza, which is what they have all been desperate to do anyway.

We are hoping to arrange an full X-Box and trampoline day at Maria's house, to make up for all those times they were dragged away to play with robots or go through presentation scripts yet again!!!

So now all that remains is the Oscar speech. Three huge thank yous are needed. Firstly to the lovely Maria who lent us her house for the duration of the competition. One of the biggest headaches I had as team coach was finding somewhere to meet and in the end it was just too expensive or inconvenient. Maria stepping into the gap made it possible for us to carry on in the competition and the last week was especially busy in her house!! Secondly Jeremy who mentored the programmers in using the NXT software. Jeremy and his family kindly donated their house and their time to making this possible. He taught them complex programming, printed t-shirts and leaflets, and generally spent plenty of time reading up on NXT software and what we needed to learn. And finally to Sophie who mentored the team through the design process for the project side of things, helping them clarify their thoughts around what they wanted from their design and how they would make it appealing, who would but it etc., etc.,

And then there are the parents who ferried children around, Paul who helped with the table, former team members who were all a part of getting to this point, Sean at Techniquest who first introduced us to NXT programming, Dave who designed and maintained a wiki for them to practice some basic programming and Tara who helped with the session. I'm sure there are many more but all will have been acknowledged in this blog somewhere.

So Thanks. A great team effort.

The day it all went wrong!!

There's always one, in the run up to any deadline, there is always one day when nothing goes your way. It is also, always, something unexpected. Rather than broken props or forgotten lines, bad light conditions or dead lap tops, we actually managed to break the robot.

It turns out that Marvin, as our robot has been christened, does not get along well with new, good quality batteries. It went completely bonkers while trying to place the gardening patch where it was supposed to be and snapped one of the connectors holding on the back wheel as it careened out of control over the transition table. We did also manage to make hi break dance at one point!!

Of course it took a lot of head scratching to figure out why everything had gone so wrong when none of the programs had been changed. Fortunately we decided not to change anything until we had been through all the programs to find out what else didn't work. By the time we had done that, the batteries had run down a bit and Marvin was back under control.

We have found a huge problem in one of the programs though, it just takes too long to line up accurately so we are going to have to come up with a last minute plan. Sam and Jeremy to the rescue!!

One more session on Monday to practice our presentation, practice our interview and practice lining up. We have no idea whether we can do the robot game within the time or whether we can line up when the table is raise doff the floor. It's all getting a bit close to the wire.

5 days to go

One week to go!!

Well the tension is mounting, the last minute scrabble round for props is upon us, it is the last chance to iron out glitches in computer programmes, power point presentations and scripts. In exactly one week from now we will know how well all our work has paid off. This time next week we will have done it, we will have competed in our first FLL tournament.

Part of the process is to be interviewed as a team on both the project and how we tackled the robot game. This is no easy matter, as we found out today, as we do not know what the questions will be. Trying to answer as a team is tricky; usually everyone aanswers at once, pr no one answers at all. Everyone needs to listen to everyone else, give everyone a chance to speak and at the same time make sure all the information has been given that might be needed. Members of the team who may be reluctant to speak in a group need to be given a chance and those who have a tendency to speak all the time need to give everyone a chance.

The presentation is great. The final touch will be for everyone to learn lines so that they are not juggling scripts and props and they can look at the judging panel. The power point that they have put together is largely sorted out and on Friday we are going to work on making sure it is where we need it as we had some technical difficulties accessing it on the laptop today.

The robot game needs some tweaking and loads of practise, of course the more we practise the more problems we find, but we are generating a reliable list of thing that need to be checked before the robot leaves base. There are a few minor programming glitches to be overcome and we still need to make sure we all know what we need to do when.

It's all getting a bit exciting!!