Re: 1 joystick or 2?
 

I agree that two joysticks is good for a tank drive system. What does everyone use for a crab drive?

Re: 1 joystick or 2?
 

Two joysticks for driving, hands down. We also used two joysticks for our developmental mecanum drivebase from a year ago; it worked really well to control it.

In years past we have used one joystick to control arms with a shoulder joint.

All of the joysticks (in the past) have been the old school flight sticks. Compared to the new ones, they are leaps and bounds better.

Re: 1 joystick or 2?
 

I like having two joysticks... even if they are both right-handed ones. I control the bot by placing my pointer finger and index finger on top of them and gently moving them with my arms. Kinda like a DJ scratching a disk. Others prefer holding the sticks at their base and moving them with their wrists. Consult your driver for his/her input.

Re: 1 joystick or 2?
 

I'd imagine for crab, we'd use tank as well... We'd probably just add a potentiometer to the OI that turned the wheels when we turned it.