Methods, systems, and products are disclosed for providing communications services. The electric motor device includes: a first drive member that has a plurality of permanent magnets; a second drive member that has a plurality of electromagnetic coils; and a clearance controller that shifts at least either one of the first drive member and the second drive member, thereby changing a size of a clearance formed between the first drive member and the second drive member. The conveyance plate has a plurality of platen openings formed therein at positions corresponding to the belt openings in the width direction, and is disposed on a back surface side of the conveyance belt. The processor is electronically coupled with the sensor. In the auto-selecting mode, movement of a predetermined developing device to a predetermined position is started before the auto-discriminating portion makes the discrimination.