Media conveyance device, printer, and control method of a media conveyance device

A media conveyance device comprising:

• a paper roll rotating mechanism having a spindle to support a paper roll, and configured to drive the spindle and rotate the paper roll;
• a conveyance mechanism configured to convey media delivered from the paper roll;
• a controller configured to control the paper roll rotating mechanism and the conveyance mechanism, and convey media delivered from the paper roll;
• a first detector including a first emitter and first photodetector disposed vertically below the spindle, and outputting to the controller a signal based on the amount of light detected by the first photodetector;
• and
• a second detector including a second emitter disposed vertically below the first emitter and a second photodetector disposed vertically below the first photodetector, and outputting to the controller a signal based on the amount of light detected by the second photodetector;
• the controller selectively driving the first emitter and second emitter when driving the conveyance mechanism, and driving the spindle based on signal output from the first detector when the first emitter emits, and signal output from the second detector when the second emitter emits.