Image forming apparatus and cartridge detachably mountable thereto

摘要

An image forming apparatus including image forming means for forming an image on a recording material, wherein at least a part of the image forming means is in the form of a unit which is detachably mountable to a main assembly of the apparatus, said apparatus includes memory, wherein said memory is mounted to said unit, wherein said memory stores information relating to timing at which a driving parameter of said image forming means. <IMAGE>