No downward or upward motion at all, strictly right and left?

On my car there is upward and downward motion on the widnshield wipers. That's because my windshield has up and down to it. Now maybe if you had wipers on your sun-roof…

Attually® on most windshields these days there is roll and yaw going on, cause the windshield isn't straight up and down.

Your turntable is all yaw. (you remember turntable?)