How does a printer work

1. data form file to be print is sent to printer driver, printer driver checks if it's understandable and if printer is able to carry out print job 2. Data sent to printer is stored in printer buffer 3. piece of paper is fed into printer (if no paper, message is sent to computer) and printer head moves across paper to produce character/image 4. after print head passes, paper is advanced to print for next line 5. process if repeated until printer buffer is empty. If empty, printer buffer will sent an interrupt to computer requesting for more data