Appendix D

Adjusting Darkness For “In-Spec” Bar Codes

All direct thermal and thermal transfer materials do not require the same darkness setting. The best way to check for proper darkness is to use a bar code verifier that actually measures bars/spaces and will calculate the print contrast. Without the assistance of a verifier, your eyes and/or the system scanner are the best bet for choosing the optimal darkness setting. What follows is a simple yet effective method for adjusting the darkness to print “in-spec” bar codes.

1.Load media according to the appropriate media loading and ribbon loading instructions in “Getting Ready to Print.” Insure the proper print method has been selected (see “Configuration and Calibration”).

2.To print a label for evaluation, turn the power off; then, press and hold the FEED key. Next, turn the printer power on and release the FEED key. The printer will begin printing test labels.

3.Print a label, then press the PAUSE key. The label will contain two bar codes, as well as other printer information. Normal bar codes are printed in a horizontal (“picket fence”) format as they feed out of the printer. Rotated bar codes are printed in a vertical (“stepladder”) format.

4.Compare the test label printed to the bar codes in Figure 28. If the test label appears too dark or too light, refer to “Configuration and Calibration” and increase or decrease the darkness setting accordingly.

5.Resume printing by pressing the PAUSE key again. Print a few labels at the new setting and verify that proper “in-spec” bar codes are being printed. Repeat steps 3, 4 and 5 until satisfied.

6.To terminate the printing of the test labels, first press the PAUSE key and then press the CANCEL key.

Too Dark

Labels that are too dark are fairly obvious. The normal bar code bars increase in size, and the openings in small alphanumeric characters may fill in with ink. It may be readable but not “in-spec.” Rotated bar code bars and spaces will run together.

Slightly Dark

Slightly dark labels are not as obvious. The normal bar code will be “in-spec.” Small character alphanumerics will be bold and could be slightly filled in. The rotated bar code spaces are small when compared to the “in-spec” code, possibly making the code unreadable.

Slightly Light

Slightly light labels are, in some cases, preferred to slightly dark ones for “in-spec” bar codes. Both normal and rotated bar codes will be in spec, but small alphanumeric characters may not be complete.

Too Light

Labels that are too light are obvious. Both normal and rotated bar codes have incomplete bars and spaces. Small alphanumeric characters are unreadable.

170PAX2-Series User’s Guide

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Zebra Technologies 170PAX2TM manual Appendix D, Adjusting Darkness For In-Spec Bar Codes
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170PAX2TM specifications

Zebra Technologies, a leader in industrial printing solutions, offers the 170PAX2TM printer, a versatile and robust solution targeted towards high-performance applications. Designed for industrial environments, the 170PAX2TM stands out for its advanced features and technologies that elevate operational efficiency and streamline workflows.

One of the key features of the 170PAX2TM is its exceptional printing speed. Capable of producing high-quality labels at a rapid pace, this printer significantly reduces the time required for label production, making it an ideal choice for businesses with large-scale printing needs. The printer supports a broad range of media types and sizes, allowing users to create everything from small labels to larger tags with ease.

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In addition to its robust build, the 170PAX2TM incorporates state-of-the-art printing technologies. It utilizes direct thermal and thermal transfer printing methods, providing flexibility for various label materials. The printer's advanced thermal printhead technology ensures sharp, clear images and text, which is essential for barcode clarity and scannability.

The 170PAX2TM also boasts user-friendly features, including a large LCD display that simplifies navigation and operation. With intuitive controls, users can easily adjust settings, monitor print jobs, and perform maintenance tasks with minimal training. The printer also supports various connectivity options, including USB, Serial, and Ethernet, making integration into existing systems straightforward.

The device is also designed with energy efficiency in mind. It features power-saving modes that help reduce energy consumption, contributing to a greener, more sustainable workplace. Additionally, its smaller footprint allows it to fit seamlessly into any production line without taking up excessive space.

Overall, Zebra Technologies' 170PAX2TM printer combines speed, durability, and advanced printing capabilities, making it an invaluable asset for businesses looking to enhance their labeling processes. Whether in warehousing, manufacturing, or distribution, the 170PAX2TM delivers dependable performance that meets the high demands of today's industrial environments.
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