| 摘要 |
A method for registering printer dots in a printer having separate cartridges or print bars which create dots on paper moving therebeneath. Commands are generated to drive a paper carrier past the cartridges. Machine readable targets on the paper carrier are scanned and a processor uses signals generated by the targets for measuring the distance traveled by the carrier between detection of the first and second marks. The difference between the measured distance and the distance which yields ideal registration is used to delay (or advance) dot firing to improve registration. In another aspect, targets comprising slots oriented transverse to paper movement and at a 45 DEG angle relative to paper movement are photolithographically engraved in nozzle plates. The slots are scanned to produce information about misregistration along an axis in the direction of paper movement and along an axis transverse thereto.
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