Number of motors: 2 Size: Estimated 10amps.... 24V 250w What do you mean positing feedback? and also I am to have a caster controlled at the front controlled by a servo idk if that will make me have a custom Movement Panel as I really don't know how to script it.. but if you know how to script it and I need to use it, I would appericiate your help with the scripting.... and I might actually use the sabertooth depending on how this "custom movement panel" scripting is gonna go.. Motor I am planning to use: http://www.jojocycling.com/index.php?route=product/product&product_id=76747&currency=AUD&language=en

Thank you rich and everyone else for taking your time to help me.

My advice for you since you don't have much experience in robotics is to start basic and small. Purchase the EZ Robot developer's kit and build yourself a small robot from the kit... The kit has everything you need save for a chassis to attach the wheels and ezb4 to... The experience you gain building it will allow you to build a bigger more complex robots.....

Richard, I have had ALOT of experience with arduino robots. But I never used motors or Hbridges with it or EZ-Robots I have the confidence that I can make this ima try my best

If you know EZ-robot scripting let me know

I don't think I have ever built a robot that didn't use motors or servos to some extent... What did you build with the arduinos? My way of scripting won't help you since it is specific the robots I create... A manual for a Honda wouldn't be any good for working on a Toyota... Albeit both are similar cars, they are still quite different in details... Saying that, ARC provides tons of example code to help you get started in scripting....

I can help with the Sabertooth (which is easy). Rich is the H-Bridge guru... But again a physical robot would really help with the coding....

I usually write my software after building my bot...

I used servos but no motor.

Richard so basicly all it is a caster at the front that is controlled with a servo and 2 wheelchair motors at the back and I wanna use the custom Movement Panel with it.....

Ok so what you would do: Straight: Have the custom Movement Panel set to move both motors forwards and backwards(which, if using a sabertooth, you will have to put a serial code line for each motor, and each direction.) And along with the forward arrow have the steering servo go straight.

Turning: to turn you will need to make the servo turn in the direction you want to turn and at an angle you want. Setting up a joystick which moves a slide script would make this big bot turn smoothly. Along with the servo you'll need to slow down the motor your turning towards,or you'll just start peeling the front tire off the servo. (Think of a 2wd 4wheeler. If you lean back while turning, it barely turns, and if you lean forwards the inside wheel spins as you turn.)

Once you get that out of the way, you need to design the bot and think about these points:

-how will you power it? Most wheelchair motors pull 5-10amps each. This means if you want to go far you'll need lots of power(car batteries)

-how much weight will the motors be moving? You have to think of the chassis, your weight, your passengers weight, and the battery weight.

Hope this helps! Tech