I have read online that the a320 rudder pedals provide nose wheel steering up to about 6 degree deflections. Why then do I see a320's performing flight control checks at my local airport, rudder included, and the aircraft remain taxiing in a straight line? Thanks.

They have a nose wheel steering disconnect button on the tiller, and a switch below the brake fan button.Regards

It's possible to disconnect nose-wheel steering.Oops! cross-posted with Flex

:)

Additional info: On Boeings it's not necessary to disconnect anything. The steering tiller (approx 60deg) overrides the rudder pedals.If you make a rudder check it's extremely important to hold the tiller rocksteady to avoid any nosewheel deflection while applying full rudder.

Very informative thanks for the info guys.