摘要:
A method for aligning a printhead to compensate for printhead roll when an image receiving member moves laterally during printing has been developed. The method includes generating at different times a plurality of marks in a process direction with different inkjets in a printhead and identifying relationships between marks in each plurality. Lateral motion is thereby detected and removed from the analysis identifying the magnitude of the roll corresponding to the locations of the marks in the pluralities of marks.
摘要:
A method for aligning a printhead to compensate for printhead roll when an image receiving member moves laterally during printing has been developed. The method includes generating at different times a plurality of marks in a process direction with different inkjets in a printhead and identifying relationships between marks in each plurality. Lateral motion is thereby detected and removed from the analysis identifying the magnitude of the roll corresponding to the locations of the marks in the pluralities of marks.
摘要:
A system and method is provided for detecting and correcting color-to-color process direction misregistration errors, including a printer capable of printing in a plurality of colors, the printer having a sensor for generating a signal including information corresponding to a color registration pattern printed on a substrate by the printer. The system and method further include a processor for receiving the signal from the sensor and analyzing the signal for detecting color-to-color process direction misregistration via an algorithm. The color registration pattern includes a plurality of segments, each segment associated with a different color of the plurality of colors and each segment including at least one different dimension from at least one other segment of the plurality of segments.
摘要:
In a color marking assembly, a series of ROS units are aligned above a photoconductive surface. These units have side mounts and a side positioned outboard linear actuator connecting them to this assembly. The inboard mounts are attached to a first inboard side of the ROS, and the outboard mounted linear actuators are attached to a second outboard side of the KROS unit.The inboard mount is an elongated bar extending beyond the height of the ROS unit. This elongated bar has hinged portions on both its top and bottom connections to the ROS unit. The linear actuator that is positioned on the outboard side of the ROS unit has a rigid sphere, resting in a V-housing in a V-Block. This actuator configuration and the board mount enable the ROS unit to be easily deskewed when required to provide improved vibration-free images.
摘要:
A system and method is provided for detecting and correcting color-to-color process direction misregistration errors, including a printer capable of printing in a plurality of colors, the printer having a sensor for generating a signal including information corresponding to a color registration pattern printed on a substrate by the printer. The system and method further include a processor for receiving the signal from the sensor and analyzing the signal for detecting color-to-color process direction misregistration via an algorithm. The color registration pattern includes a plurality of segments, each segment associated with a different color of the plurality of colors and each segment including at least one different dimension from at least one other segment of the plurality of segments.
摘要:
Disclosed are embodiments that use multiple, belt-steering systems to control and maintain alignment of an endless belt. The position of the edge of the belt is measured by multiple belt edge sensors and then corrected by at least two steering rollers connected to corresponding steering mechanisms. The steering mechanisms tilt the rollers in order to selectively adjust the lateral position of the belt. Steering can be controlled independently with the tilt of each steering roller being adjusted based solely on information obtain from a corresponding belt edge sensor. Alternatively, steering can be controlled dependently with the tilt of each steering roller being adjusted based on information obtain from multiple sensors at multiple locations and further based on the predictable impact of the simultaneous movement of both rollers on belt positioning. In addition, at least one of the steering rollers can also be configured as a drive roller.
摘要:
In one embodiment, a method of measuring color-to-color registration includes: a) marking test pattern images on an image receiving member using a reference color separation station and a first color separation station over a process direction span in relation to selected target media and a cyclic characteristic of a multicolor marking platform, b) detecting each test pattern image, c) determining a registration measurement associated with the first color separation in relation to the reference color separation for each test pattern image, and d) determining a repeatable registration error pattern associated with the first color separation and the selected target media in relation to the cyclic characteristic based at least in part on the registration measurements determined in c). In one embodiment, the multicolor marking platform includes a marking engine, a controller, an image receiving member, a sensor, color registration measurement logic, and repeatable registration error determining logic.
摘要:
A method of maintaining a rotational velocity of an imaging drum in an image producing device includes constructing a table of a drive current for a transfer roll for a plurality of first distances between the imaging drum with the transfer roll, and utilizing the table to control the transfer roll drive to maintain a substantially constant imaging drum rotational velocity at each of the plurality of distances.
摘要:
A method for aligning a printhead to compensate for printhead roll has been developed. The method includes simultaneously operating a plurality of inkjets in a printhead to eject ink drops to form a plurality of marks on an image receiving member. A plurality of cross-process direction distances between one mark formed by a reference inkjet and each of the marks formed by the other inkjets is identified. A magnitude of a difference between an angular orientation of the printhead and the cross-process direction with reference to the plurality of identified cross-process direction distances indicates any printhead roll.
摘要:
A method for monitoring an image printing system that prints color images on an image bearing surface movable in a process direction is provided. The method includes placing marking material to form a row comprising a plurality of registration marks on the image bearing surface, wherein each row of registration marks extends along a cross-process direction transverse to the process direction; detecting a position of each registration mark using a linear array sensor extending in the cross-process direction, wherein the position of each registration mark is detected in both the process and cross-process direction; determining a process direction misregistration between the registration marks of each row in the process direction and cross-process direction misregistration between registration marks from each of the rows.