No I am not set on 6 wheels bud I just don't know if 4 wheels will do the trick :/ and yes I will check that out.How do you think I should set up the steering? Do you think these motors will be good? http://www.motiondynamics.com.au/worm-drive-motor-12v-24v-200w-180-rpm-20nm-torque.html and where can I get these "wheelchair motors" from? I am probably gonna cut wood out (very light wood) and I am gonna make the frame probs gonna spary it with spray paint and make a cool image or something on it....

I would do differential steering. It is much easier than trying to build a steering system that turns the wheels, particularly on a big heavy bot.

eBay is the best place for wheelchair motors. I imagine the availability in OZ is pretty good, although maybe not as good as the USA. I'll need to do some research to see if the motors you selected are a good choice. One advantage they have is that worm gear motors hold their position well when you stop providing power, so you don't need to worry about a brake system or your bot rolling away if you park on a hill (not 100%, but better than a lot of other motors that will just spin free when un-powered.

Nothing inherently wrong with a 6 motor system, just takes some thought and engineering to make sure the speeds match and that when you are turning they all are doing the same thing and not fighting each other. Done right, you get a lot of stability and control under adverse conditions (rough ground) using a six motor system, and of course, good weight bearing without worrying about breaking your frame since you are spreading the load across a larger surface.

Alan

Thx for the advice Alan and I think now I might actually do 4 wheel but how do I do the differential steering with that I don't really get differential steering works.... please explain......... is it like that motor bike type or ?

Differential steering is what you automatically get when you drive motors through an EZ-B movement panel.

In its most basic form, to turn right, the right wheels spin backwards and the left spin forwards. Vis Versa to turn left.

basically it turns in place.

However, if moving forward at and turning, instead of one set moving backwards, the wheels on the side you are turning towards just move slower or stop while the other side wheels push you around the turn.

Think tank or 6-wheel off road ATV.

The other option. What i call "normal" steering is actually much more complex to engineer in a robot. It the way a car turns. Where the front wheels turn in the direction you are turning. Making a robot control a steering wheel or steering shaft is actually quite complex, particularly on a large (or powerful) robot.

Alan

Differential steering is like how a tank steers... Left wheels spin one direction, right wheels spin the opposite or vice versa... A wide, short chassis will turn better...

RR is that not how roli works?

@nomad18.08.... Yep, Roli uses differential steering....

maybe the roli is a good for starting ez,for theekchana.