Some general tips please

[team_ireland]

Some general tips please

Ewan said:
Electronizes more than IBC??? The external relay mod only allows for about 40A I wouldve thought. But yeah, as Alan says, second hand 4QDs may be a cheaper option. Also you might be able to buy the interface with the 4QDs if someones got a whole driving set-up going.

Depends on the relays you use. The fets can take in excess of 90amps compaired to the IBCs 50!

[Guest]

Some general tips please

ok ok people. please dont get too technical here and remember when i see tight budget i mean tight. also we have an 80kg weight limit for the compeptition but we are aiming for 40-50kg. Could someone give me the easiest set-up for an r/c system

[blazerbotics]

Some general tips please

what competition are you entering?

the set-up will depend on what speedos you use, some are just a case of pluging the things in, other systems can require more.

[storm]

Some general tips please

Mark, can you give us some more details on the competition youre entering. Am not aware of anything running to an 80Kg limit in the UK at the moment... if if you can use 80Kg, why in the world would you aim to only use 40 ?

Ed
http://www.teamstorm.comhttp://www.teamstorm.com

[Guest]

Some general tips please

I am entering a British Nuclear group competition. I would prefer a servo where it was just a case of plugging things in. We also have to have a button wired in which will turn the robot completely off. Id like some speedo reccomendations please. One that i can get for as much under £100 as possible.

[jim]

Some general tips please

One other option Mark: get in touch with Roger Plant (http://www.bigcheeserobot.com/http://www.bigcheeserobot.com/) and see if he still sells the Curtis speed controllers. They were £50 each when I got mine (so £100 for both motors) and are easily powerful enough for wheelchair motors.

They take a 0-5V analogue input so youll still need an interface of some sort.

[Guest]

Some general tips please

Ok ill consider that.

are these the kind of interfaces ill need?-
http://www.technobots.co.uk/en-gb/dept_78.htmlhttp://www.technobots.co.uk/en-gb/dept_78.html

[woody]

Some general tips please

http://www.technobots.co.uk/en-gb/dept_518.htmlhttp://www.technobots.co.uk/en-gb/dept_518.html

Try the MD22 rated @ 22 amps with a suitable heatsink NOT SUPPLIED .....plugs straight into your reciever and drives 2 motors.

Thats 500 watts of power @ 24 volts .....should be enough for your 50 kg bot.

[team_ireland]

Some general tips please

The problem still is failsafeing and whether or not they are required by the competition.

[Guest]

Some general tips please

A failsafe isnt required but a visible isolating switch is

[woody]

Some general tips please

Switch ...
http://www.vehicle-wiring-products.co.uk/VWPweb2000/battisol/battisol.htmlhttp://www.vehicle-wiring-products.c.../battisol.html

Note :- The 500watts mentioned in my previous post is I believe EACH motor WITH a suitable heatsink.

BTW ... What is the competion about?

[simon]

Some general tips please

Mark.I have a part built middle. Send me an e if your interested.

[Guest]

Some general tips please

Ok thanks peeps.
Could someone please give me some tips for interfaces that work with these speedos. And whatis and how do i obtain a heatsink?

[Guest]

Some general tips please

maybe i should say what our initial design is at the moment. We are going to use a flat cuboid type shape with bucket scoops on both ends, one inverted so we can allow for flipping and its also ideal for the obstacle which we must complete and for pushing people of the arena

[woody]

Some general tips please

Mark.
They DONT need an interface ....its as I said plug -n - play.

5. Control of the module can be any of;
a) I2C bus, up to 8 MD22 modules, switch selectable addresses and 4 modes of operation including steering..
b) 2 independent 0v-2.5v-5v analog inputs. 0v full reverse, 2.5v center stop, 5v full forward.
c) 0v-2.5v-5v analog input for speed ,with the other channel for steering.
d) independent channel RC mode. Motors are individually Controlled directly from the RC receiver output.
e) RC mode with steering, allows speed control with one stick of radio control, and steering with the other

Option e)