Help required related to drive system of robot

[gulati.ishank]

Basically, i have to build a manually controlled wheeled robot which will pic balls from right side of the arena and drop it in the drop zone on the left side.So i was thinking that point turning would be very beneficial but i am not able to decide which drive system should be used.Also robot has to climb a 20 degree slope.
I am making a robot for the first time so any relevant websites where i can read about this particular topic would be great.

[newInRobotics]

So i was thinking that point turning would be very beneficial but i am not able to decide which drive system should be used.

What drive systems do You have in mind (or should I say "steering" systems)? Anyway, from what comes to head, point turning can be achieved with:

• Differential steering system
• Or if Your robot uses ball instead of its wheels
  
  A Robot That Balances on a Ball

I think what You are looking for is "differential drive/steering", for which You simply use 2 (or more) motors on each side of the robot base. If both motors are driven to opposite directions - robot goes straight, if motors are driven to same direction - robot makes point turn.