Starting Point

[zoll]

Re: Starting Point

cheers, just waiting for reply from grant but does anyone know how bit the blue wheels are nd how easy they are to attach?

[RogueTwoRobots]

Re: Starting Point

The two main sizes of blue wheels used are 75mm and 100mm. They are also available in 63mm and 120mm and sizes upwards of that I believe. When it comes to attaching them, if they've got a nut fitted into the centre of the wheel it is simply a case of screwing the wheel directly on to the output shaft of the drill motor. As a securing method, the reverse-threaded screw that comes with the drill that holds the chuck on can be screwed back in with a washer on it to stop the wheel unscrewing.

Quite simple and allows for relatively straight-forward maintenance.

[muchalucha]

Re: Starting Point

you will also want to look into some way of mounting the drill motors , this often overlooked but very important for a reliable bot.

[psycho_fling]

Re: Starting Point

Grant (robochallenge) can also supply the drill mounting kits

[zoll]

Re: Starting Point

Excellent, just waiting to hear back from him, doesnt appear to have been online in the last week. Any idea how much the wheels and the mounting kits cost?

[psycho_fling]

Re: Starting Point

i have never bought the mounting kits

and the wheels vary depending on size

[muchalucha]

Re: Starting Point

roughly : 75 mm ar a fiver , 100 mm are £6 and 125 are £7 , add another pound per wheel for the nuts melted in (which you will need) . so for 100 mm wheels , itd be £28 for a 4wd bot like yours , there worth the monies. No idea how much the mounting kits are.

[zoll]

Re: Starting Point

Cool just need to wait for Grant to get back to me on them then. Below is a list of bits that ive decided on and those which I am still undecided.

Motors: 4 drill motors (2 already bought and dismantled)
Speed Controller: Sidewinder (looking at buying in the next week or so)
Body: HDPE (also looking to order in the next week)
Batteries: (going to use those of the drill, does this sound alright for a start?)
TX & RX (looking at the DX5 but not sure on this atm, any comments?)

Weapon: Axe (where can I find information of the a design for this?)

Thanks again as always for all your help

[RogueTwoRobots]

Re: Starting Point

If you're opting for an electric axe, this article sheds a bit of light on the basics of an electric axe. Obviously axes don't have to be made exactly like this one but it should give an insight into the process/parts required:

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

And that same robot a couple of evolutions later:

http://www.youtube.com/watch?v=Fl1cOdXizC8

[psycho_fling]

Re: Starting Point

i think the dx5 is good but never used it before the planet 5 is a cheaper option which a few people are very pleased with for about £40

the batteries you can make them work but you can buy some cheap nimhs off ebay which will last much longer, thi would mean you would need a different charger (not sure if you are planning on using the drill charger for those batts?) i have a multi charger which can handle many different types of batteries with lots of other functions (let me know if interested)

alex

[zoll]

Re: Starting Point

If i bought batteries off ebay, how many would i need for 4 drill motors and what would i be looking for? If i did go this route I would be interested in your charger but what kinda price are we talking?

[psycho_fling]

Re: Starting Point

ok 2 of these would do fine

http://cgi.ebay.co.uk/7-2v-NiMH-3700mAh ... 3357365ba0

this shop/seller has been very helpful to me and loads of other roboteers

the charger new would be £75 but mine is used but in good condition and comes with box and instructions and all the leads, (btw this is the type you can just plug into a wall socket)

i would be looking for £50 however i have said to someone else that they are welcome to buy it but i will contact them to see what they say and repost later

let me know if interested

alex

[zoll]

Re: Starting Point

I would need 4 or 8 for 4 motors? and yeah if hes not interested let me know

[muchalucha]

Re: Starting Point

2 would be fine, 7.2 V batteries n series make 14.4 V , an ideal voltage for a 12 V drill motor.

[calumco]

Re: Starting Point

im running 12 volt drill motors on 14.4 volts on 100cm blue wheels and its a really nice nippy speed that you get. so i recommend it also