Autonomous floor cleaning with removable pad

An autonomous floor cleaning robot, comprising:

• a robot body;
• a controller supported by the robot body;
• a drive supporting the robot body to maneuver the robot across a floor surface in response to commands from the controller;
• a pad holder attached to an underside of the robot body and to hold a removable cleaning pad during operation of the cleaning robot, the removable cleaning pad comprising a mounting plate and a mounting surface, the mounting plate being attached to the mounting surface;
• and
• a pad sensor to sense a feature on the removable cleaning pad and to generate a signal based on the feature, the feature defined at least in part by a cutout on the mounting plate;
• wherein the mounting plate enables the pad sensor to detect the feature, and wherein the controller is responsive to the signal generated by the pad sensor to perform operations comprising:
• selecting a cleaning mode from among cleaning modes based on the signal, and
• controlling the robot according to a selected cleaning mode.