Maintenance cart for moveable flatbed media marking system

A method of cleaning a marking station, the method comprising:

• moving a maintenance cart along an air-bearing portion of a rail support track, the air-bearing portion of the rail support track extending past a marking station for marking substrate media sheets, the movement along the air-bearing portion facilitated by a first motion support assembly extending from the maintenance cart, the first motion support assembly including a glide surface providing a non-contact bearing support for the maintenance cart, the non-contact bearing support being between the air-bearing portion and the glide surface;
• cleaning a marking element of the marking station using a marking station cleaner mounted on the maintenance cart, the movement of the maintenance cart past the marking element enabling the marking station cleaner to clean the marking element;
• and
• moving the maintenance cart along a second portion of the rail support track, the second portion of the rail support track extending beyond the air-bearing portion of the rail support track, the movement along the second portion facilitated by a second motion support assembly, the second motion support assembly directly engaging the second portion of the rail support track during movement thereon, the second motion support assembly being disengaged from the rail support track when the glide surface provides the non-contact bearing support for the maintenance cart.