Cognex Barcode Readers—Ten Reasons Why You Should Choose an Image Barcode Reader

1. Read rate

The read rate is the most important way to measure a handheld computer. The read rate is the number of barcodes read divided by the total number of barcodes attempted to be read. It is usually expressed as a percentage, with the closer to 100% the better. That said, the read rate is the best measure of the reliability and stability of the barcode in the barcode reader reading application. Image-based barcode readers can read the entire barcode, not just a single line, so they can use advanced algorithms to address quiet zone scrambling and other code damage that often plagues laser scanners. In addition, image-based barcode readers can use a light source to read codes that are not visible to laser scanners, including barcodes printed with UV inks. In this way, image-based barcode readers can achieve higher read rates, even for codes that cannot be read by laser scanners. High read rates improve production traceability and reduce labor costs associated with the need to manually process "unread" or unreadable parts/packages.

2. All-round code reading

Image-based barcode readers can read barcodes in any orientation in a single read. Conversely, barcodes with irregular orientation often require multiple laser scanners to be configured together to read. Image-based barcode readers can not only process typical trapezoidal or fence-shaped barcodes, but can also read barcodes in any orientation.

3. 2D code reading

Many industries are transitioning from 1D to 2D coding, such as data matrix or QR coding. 2D coding stores more information and helps enable product traceability throughout the production process and supply chain. A combination of 2D and 1D barcodes is often used in the production process. But laser scanners can't read data matrices or QR codes. In contrast, image-based barcode readers can reliably read 2D codes as well as 1D barcodes – even both. In fact, image-based barcode readers are often designed to read 2D codes (i.e., direct part marking, or DPM) that are directly marked on the part. Many 2D codes are laser etched or dot-engraved onto the part, resulting in a permanent DPM. Even hard-to-read codes due to poor marking quality or glass, curved surfaces can be easily read using advanced reading algorithms.

4. Multiple encoding reading and output functions

Since there are currently many types of image-based barcode readers, we must point out that their quality is not the same. The best image-based barcode readers utilize advanced algorithms to locate and decode multiple barcodes (1-D or 2-D) of any type. These readers allow the user to set the order of output, making it easier to integrate the reader into the production process. In many applications, the order in which the encoded information is output by the reader is of great importance.

For example, it can indicate which tube the code is read on, or which part of the chassis is in which position. In addition, these state-of-the-art image-based barcode readers provide a powerful scripting language that allows users to write logic such as ensuring that 1D barcode data matches 2D code data, further guaranteeing product quality and traceability.

5. Long-term reliability

Laser scanners use a swinging scanner to quickly sweep the laser beam across the barcode, creating a laser line that reads the code. These moving parts are often worn out or cracked, requiring repair or replacement. Image-based barcode readers have no moving parts and are designed for long-term reliability and low maintenance.

6. Visualization

Image-based barcode readers are fundamentally different from laser scanners in that they take a picture of the product as it passes by, and then look through the photo for the barcode that needs to be decoded. When using image-based barcode readers on a production line, operators are able to monitor the read rate data and see the image read by the barcode reader. This allows the operator to know how the system is performing and to quickly understand the current situation if it cannot be read. Because it is able to respond quickly to errors such as no label added or the label printer is out of ink, it improves the process and increases throughput. In addition to being able to "what you see is what you get", operators can make simple adjustments to the reader through the online view without having to look through the manual to understand the process of changing settings.

7. Image Archiving

For laser scanners, even if a barcode reading fails, it may not be known. The most powerful image-based barcode readers can archive the images read. Users are often unable to archive images that fail to read, making it impossible to understand the cause or improve the process. For example, these images can be used to see if there is no barcode or if the barcode is of so poor quality that it cannot be decoded.

8. Barcode Quality FeedbackAs many product lines must ensure that codes can be read by other barcode readers in the product distribution chain, it is important to maintain high print quality of barcodes. Image-based barcode readers can provide feedback on print quality, so manufacturers are able to make adjustments before sending poorly printed codes to customers.

9. Communications

Industrial protocols such as Ethernet/IP and Profinet enable image-based barcode readers to be easily integrated into factory networks. Direct communication with the PLC enables data communication and control, making barcode readers part of the quality control process.

10. Adaptable to future needs

While many industries have begun to add 2D codes such as data matrices or QR codes to provide additional tracking information, not all industries are quick to embrace these types of codes. If that's the case, some image-based barcode readers make it easier to help you make the transition from laser-based to image-based reading at a lower cost. These barcode readers can read a full range of 1D barcodes with little risk, and these 1D barcode reading models can be upgraded to read 2D codes such as Data Matrix and QR codes at a low cost. In addition, state-of-the-art image-based barcode readers have firmware upgrade procedures that ensure that the latest decoding methods and new encoding types are available after the reader firmware upgrade. Future-proof features allow users to transition from laser scanners to image-based barcode readers at a lower cost, with the flexibility to upgrade in the future without having to replace the reader again and again.

Cognex Barcode Readers—Ten Reasons Why You Should Choose an Image Barcode Reader

Cognex Barcode Readers—Ten Reasons Why You Should Choose an Image Barcode Reader

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