elobire's build thread

a couple of people wanted a update on my first robot so i thought id make a build thread.
this is what i have so far:
http://i639.photobucket.com/albums/u...e/PICT0006.jpg
not the nicest looking thing but it will do just for a test untill i get a welder.
i did make it out of aluminium at first (from a dish washer), but with 75mm wheels it wouldnt get any grip, so i bought some 125mm PVC wheels from robochalenge becuase the blue wheels where sold out. anyway, i couldnt be bothered to modify it for bigger wheels so i used some chipboard and other wood.
i might get a photo of the other chasis tomorrow if i have time.

even though it works im going to wait till i get another transmitter, the one i got is for a RC car, and doesnt have two foward sticks.
im also planning on making another before entering a compotion and getting some new batteries (i was adviced to but i was on a tight budget)
i might do more to it tomorrow, but im still undecided on what weapon to use, or what to do next.

well done mate looks like a nice simple setup for a first robot

im thinking about putting a axe on it, a disk would be too dangerous and somebody said i wont be able to take it to some events?
for the transmitter im hoping to get the planet 5:
http://www.galaxymodels.co.uk/detail.as ... 2|134#lift
is this the ideal one i should get? i only have up to £50 for the transmitter.

Yeah with a spinner you will only be able to compete at events run by Robo Challenge as theirs is the only arena that can safely contain spinners at the moment. With an axe you will be able to run at Roaming Robots and Robots Live events too.

The link you've provided is only for the Planet 5 transmitter. You would need to buy the receiver to go with it, which will probably cost ~£15 so that'd be right up at your total of £50.
Alternatively, there is the 2.4GHz 4-channel transmitter and receiver combo from Giant Cod RC for ~£26:
http://www.giantcod.co.uk/gianitcod-24g ... 03779.html

That is a basic-function transmitter/receiver, it will allow you to control your robot and has inbuilt mixing if you wish to have one-stick control, but features such as dual rates etc (commonly found on more expensive transmitters) aren't present but also aren't essential to the control of your robot so it would be a suitable alternative to the Planet 5 set.

http://www.elitemodelsonline.co.uk/Prod ... ET-MODE-II

There you go, with a reciever and under £50.

i might just go with the one from giantcod instead, looks decent enough untill i can afford something better.
done a bit of research on the axe, and a guide said to buy this chain/sprocket set: http://secure.oatleyelectronics.com//pr ... 2cefc40094

what i was wondering is if i can use one of the scooter motors that i bought for the robot drive but decided it was too complicated. the problem with them is that it doesnt have the sprocket for the chain on the motor, would i be able to buy a sprocket and attach it to my motor, to save me buying the one the guide told me to?

here is the motor the guide told me to get: http://secure.oatleyelectronics.com//pr ... 2cefc40094

the guide: http://www.robowars.org/wikka/ElectricAxeWeapons


im also hoping to get a welder for my birthday as well as the transmitter (i want a cheap transmitter so i can buy a decent welder), so once im done with the wooden test frame il start with a metal frame.

yeh

it depends what ratio you want ie how fast you want your axe swing compared to the motor speed

so that would dictate wether that kit would be useful (only had a quick look at the picture)

alex

I recently built an axe using this guide, although I am no expert the following two points may be worth considering.

Wood is no good for axes like this - it cant take the force and just splits, as I found out a couple of times.

Sprocket and chain do work I used one very similar to the one you are looking at (you can get them in the uk if you just ring up a scooter garage) and am pleased with the results - however I am thinking of changing to a geared system for two reasons, first the chain does come off quite a bit which is annoying and secondly it would pack more of a punch with a bigger gear reduction. From suggestions given to me I am looking at getting: Steel Spur Gear MOD 1.0 12 Tooth - Part No: 4710-012, Tbot Steel Spur Gear MOD 1.0 60 Tooth - Part No: 4710-060, Tbot Steel Spur Gear MOD 1.5 12 Tooth - Part No: 4715-012, Steel Spur Gear MOD 1.5 36 Tooth - Part No: 4715-036 (part numbers are for technobots).

Hope this helps

sorry for no updates, my internets been down.

anyway, the robot hasnt changed at all yet apart from some sections i made to tempererily hold the batteries. i havnt bought what i need for the axe or the transmitter due to internet problems either.
however i just got a welder for my birthday, so im hoping on making a metal chasis after testing it all out on the wooden one. my exams are also over next monday so i should have 2 months to make it.

one question though, what kind of metal do most people use?

Lucky, my parents won't let me have a welder as they think I'll blow myself/the house up :(

Steel, Aluminium and Titanium are most commonly used. Chances are you will have a stick welder and steel is used with them. Although but I have seen aluminium brazing rods (use a blowtorch) and aluminium welding rods (for a stick welder) that don't need any gas. Not sure if they're any good but if you don't want so shell out for a different sort of welder and gas and be able to weld ali and steel then they might be the way to go.