[KenWittlief]

the difference between a jog button and limiting the output values of the joystick to a lower range is: with a jog button you can hit your motors with a single full power pulse of energy, about 16mS long

its impossible to do that with a joystick, to push it full (or half) on, and get it back to zero in 1/60th of a second.

Hitting the motors with a short full power pulse overcomes all the friction in the system. Turning the motors just slightly on (with the joystick) doesnt.