METHOD OF MARGIN ALIGNMENT AND PLANE-TO-PLANE REGISTRATION IN A TANDEM COLOR ELECTROPHOTOGRAPHIC MACHINE

A method of setting a plurality of margins in an electrophotographic machine (10) includes setting a top margin for a reference color black (K) by establishing a first time delay between a vertical synchronization signal (Vsync) and a first line. A right margin or a left margin for the reference color black (K) is set by establishing a second time delay between a horizontal synchronization signal (Hsync) and a start of printing. The other of the right margin and the left margin is set by adjusting a scan speed of a laser beam (38) across a photoconductive element (28) and adjusting a process speed in the cross-scan direction (54) including the speed of the photoconductive element (28), image accumulation member (36), and print medium. A bottom margin is set by adjusting the process speed. The other three color planes, cyan (C), magenta (M) and yellow (Y) are then registered or aligned to the reference color plane, black (K). A method of setting a plurality of margins in an electrophotographic machine includes setting a top margin for a reference color black by establishing a first time delay between a vertical synchronization signal and a first line. A right margin or a left margin for the reference color black is set by establishing a second time delay between a horizontal synchronization signal and a start of printing. The other of the right margin and the left margin is set by adjusting a scan speed of a laser beam across a photoconductive element and adjusting a process speed in the cross-scan direction including the speed of the photoconductive element, image accumulation member, and print medium. A bottom margin is set by adjusting the process speed. The other three color planes, cyan, magenta and yellow are then registered or aligned to the reference color plane, black. Procédé servant à régler une pluralité de marges dans une machine électrophotographique et consistant à régler une marge supérieure pour une couleur noire de référence au moyen d'un premier retard temporel entre un signal de synchronisation verticale et une première ligne. On règle une marge droite ou une marge gauche pour la couleur noire de référence au moyen d'un deuxième retard temporel entre un signal de synchronisation horizontale et le début de l'impression. On règle l'autre marge droite et l'autre marge gauche par mise au point de la vitesse de balayage d'un faisceau laser à travers un élément photoconducteur et de la vitesse de traitement dans un sens transversal au balayage