Controller for controlling the current supplied to a motor of an image forming apparatus

An image forming apparatus comprising:

• at least one sheet convey system for conveying a sheet for image formation,
• at least one stepping motor for driving the sheet convey system, and
• a controller for controlling operation of the stepping motor,
• wherein the controller comprises a current value setting unit which sets a current value that actuates the stepping motor based on (i) an image formation mode, and (ii) first sheet information which is obtained through a paper quality detecting unit for detecting a paper quality of the sheets and (iii) second sheet information which is obtained through at least one of a thickness detecting unit for detecting a thickness of the sheet, and a size detecting unit for detecting a size of the sheet.

An image forming apparatus comprising:

• a sheet convey system for conveying a sheet for image formation;
• a stepping motor for driving the sheet convey system;
• and
• a controller for controlling operation of the stepping motor;
• wherein the controller comprises a current value setting unit which sets a current value that actuates the stepping motor based on sheet information obtained through (i) a thickness setting unit for setting a thickness of the sheet, (ii) a size setting unit for setting a size of the sheet, and (iii) a paper quality setting unit for setting a paper quality of the sheet.

An image forming apparatus comprising:

• a sheet convey system for conveying a sheet for image formation;
• a stepping motor for driving the sheet convey system;
• and
• a controller for controlling operation of the stepping motor;
• wherein the controller comprises a current value setting unit which sets a current value that actuates the stepping motor based on (i) an image formation mode, (ii) first sheet information which is obtained through a paper quality setting unit for setting a paper quality of the sheet, and (iii) second sheet information which is obtained through at least one of a thickness setting unit for setting a thickness of the sheet, and a size setting unit for setting a size of the sheet.