![]() If you suspect operation issues could be responsible for your scan problems take some time to review the specs and user manual of your scanner. Another scanner might be designed to read bar codes from further away to allow for quick scanning of items as they pass through a workflow on a conveyor belt. For example, one scanner may be best suited for close range, or even contact scanning because it’s intended for use cases where items will be handled closely. Keep in mind that different scanners are designed with different scan distances (or depths of field) to accommodate different use cases. ![]() In this case, our reader can read 5mil bar codes at a distance between 2.5″-6″, but it can read a 10mil bar code between 1″ and 14.5″. This image displays the ranges at which your scanner can read bar codes of different sizes. Your bar code scanner’s manual should contain an image that looks something like the one depicted above. In the simplest terms, the smaller the bar code, the closer the scanner needs to be, however, it’s still possible to be too close, even when a bar code is small. Within that overall range are read ranges defined by the size of bar codes being read. DistanceĮach scanner is designed with a specific read range or depth of field. In this case the best solution is to place or hold the labeled object at an angle that minimizes glare and provides your scanner with the clearest possible image. This glare not only affects the way we see the barcode, but the way the scanner sees it, making it more difficult for the scanner to pick up the image.Įnvironmental and label construction factors play a big role when it comes to the angle you hold your barcode to the scanner, as bright fluorescent lighting or glossy laminates can increase the likelihood of glare. You’ve probably noticed, especially on glossy surfaces, that light reflects off the bar code and visually disrupts the contrast of the code at certain angles. Scanners read bar codes by picking up on the contrast between the dark lines and spaces depicted in the code. The two most important factors when it comes to a good scan technique are angle and distance. ![]() We know! Scanning barcodes sounds like an easy enough task, but there are limits to what your scanner is capable of. If your scan issues aren’t consistent, or you can otherwise confirm your scanner is set up to read your bar codes, you may not be scanning correctly. You’re not scanning at the optimal angle or distance If they aren’t, depending on the most suitable resolution for your application you may want to look into reprogramming your scanner, ordering a new scanner, or trying a different type of barcode. It’s a good idea to check in with your scanner and/or bar code supplier to ensure your equipment and bar codes are compatible. There are many ways to program a bar code scanner and not all of them will work with your bar codes. If your scanner is neither old, nor set to read the incorrect bar code language, your issue may have to do with programming (or one of our later talking points). We should note that turning on auto-discrimination isn’t always the best solution, in fact we recommend against it in certain situations! So, if you have been advised to disable auto-discrimination, or, see that your scanner is only enabled to pick up certain bar code languages, ensure the settings allow your scanner to pick up the bar code language you are using. Check to see if auto-discrimination is enabled, if not you might want to try enabling it. One thing to check for is auto-discrimination. Once you’ve determined you have a suitable scanner, or if your scanner has worked in the past but has suddenly stopped, you can move onto the settings. ![]() Is it linear or 2D? Although you’re unlikely to come across a bar code scanner incapable of reading 2D bar codes nowadays, some older models may only be able to read linear bar codes. Is your scanner older? If so, consider what type of bar code you are using. Your scanner isn’t suited to your bar codesįirst, you need to ensure you have the right scanner for the job. ![]()
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