Printer sheet feed device having controller

摘要

The invention comprises a rotatable sheet feed roller; a rotatable press-contacting roller capable of press-contacting against an outer peripheral surface of the sheet feed roller; a sheet feed motor, being a stepping motor, for rotationally driving the sheet feed roller; and a transmission mechanism for transmitting the rotational power of the sheet feed motor to the sheet feed roller; wherein a line feed starting position of the recording sheet at a initial predetermined pitch is set to permit continuation of line feeding by a predetermined amount from a moment a mechanical condition with respect to the recording sheet changes during line feeding at a portion where the mechanical condition changes. The invention provides a printer that performs line feeding by a very accurate amount by line feeding at a constant pitch, even though a mechanical condition of the sheet feed mechanism changes.