Optimizing print quality

Smooth curves—setflat

PostScript masters that use the PostScript operator setflat produce inconsistent output across different PostScript printers. setflat controls curve rendering smoothness. PostScript curve operators use cubic Bezier control points to define the curve shape. These curves can be rendered from straight line segments. Normally the line segments are so short that the curve appears smooth. The setflat operator indirectly controls the length of the straight line segments. As stated in the PostScript Language Reference Manual, second edition, “If the flatness parameter is large enough to cause visible straight line segments to appear, the result is unpredictable. Setflat sets a graphics state parameter whose effect is device-dependent. It should not be used in a page description that is intended to be device-independent.”

Invisible strokes—0 setlinewidth

PostScript masters that use the PostScript operator setlinewidth are not consistent across different PostScript printers. setlinewidth controls the width of a stroked line. When setlinewidth is executed with an input of zero, it produces a line that is one pixel wide. On devices whose dot size is small, single- pixel-width lines may be invisible.

Scan conversion—fill, eofill, and stroke

Scan conversion algorithms are implementation-dependent, so different PostScript printers paint (“turn on”) different dots, resulting in output differences. For filled circles, PostScript printers differ in the dots they paint at the edge of the circle; thus, some printers produce slightly larger circles than others. For large circles this is not noticeable, but for small circles, it is.

Sections 2.2 and 6.5 of the PostScript Language Reference Manual, second edition, discuss scan conversion. Section 6.5 states that scan conversion details are not part of the PostScript standard.

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Troubleshooting Guide

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Xerox 4090 IPS manual Smooth curves-setflat, Invisible strokes-0 setlinewidth, Scan conversion-fill, eofill, and stroke
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4090 IPS specifications

The Xerox 4090 IPS and the Xerox 4050 IPS are two of the most advanced digital printing solutions offered by Xerox, catering to the needs of high-volume printing environments. Both models are designed to enhance productivity and deliver exceptional print quality, making them ideal for commercial printing houses, universities, and corporate environments.

The Xerox 4090 IPS, for instance, boasts a robust design capable of handling large print jobs with ease. Its standout feature is its high-speed printing capability, reaching up to 90 pages per minute. This speed is complemented by the advanced imaging technology that guarantees sharp text and vibrant images. The 4090 IPS utilizes a laser printing mechanism, which contributes to its ability to produce fine detail and consistency across various media.

On the other hand, the Xerox 4050 IPS offers slightly lower speed at 50 pages per minute but compensates with additional versatility. It supports a diverse range of media types, including heavy cardstock, envelopes, and labels, making it a perfect choice for businesses requiring varied print outputs. Both models feature a powerful processor and an extensive memory capacity, ensuring seamless print processing even for complex documents loaded with graphics and images.

Both printers come equipped with Xerox’s Intelligent Print System (IPS) technologies, which optimize print workflows for efficiency and manageability. This system allows for easy integration into existing network environments and supports various file formats, enhancing compatibility across different platforms. In addition, the user-friendly interface and touchscreen control panel simplify navigation and job management.

Security features are also a priority in both models. They include secure print functionalities and options for user authentication, ensuring that sensitive information remains protected during the printing process.

In summary, the Xerox 4090 IPS and 4050 IPS deliver outstanding performance through their high-speed printing, exceptional print quality, and adaptability to various media types. Coupled with innovative technologies designed for efficiency and security, these printers are well-suited for organizations needing reliable and high-quality printing solutions. Overall, both the 4090 IPS and 4050 IPS represent a significant advancement in digital printing technology, setting a high standard in the industry.
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