{"id":2927,"date":"2023-03-27T10:10:33","date_gmt":"2023-03-27T14:10:33","guid":{"rendered":"https:\/\/www.1stvision.com\/machine-vision-solutions\/?p=2927"},"modified":"2023-03-28T10:15:01","modified_gmt":"2023-03-28T14:15:01","slug":"do-i-need-cables-designed-for-machine-vision","status":"publish","type":"post","link":"https:\/\/www.1stvision.com\/machine-vision-solutions\/2023\/03\/do-i-need-cables-designed-for-machine-vision.html","title":{"rendered":"Do I need cables designed for machine vision?"},"content":{"rendered":"\n

Do I really need cables designed specifically for machine vision? As a distributor of machine vision cameras, lenses, camera systems, cables, and accessories, we hear this question many times a day. Why does your GigE<\/a><\/strong> or USB3<\/strong><\/a> cable cost so much?  I can just buy a cable online from Amazon, Ebay, etc. for $5 when yours costs $25 or more!<\/p>\n\n\n\n

The answer is:<\/strong> You can…  sometimes\u2026 but it depends upon many things, and how critical those things are to your application. <\/p>\n\n\n\n

Here are 5 key variables you need to consider in a camera cable selection<\/u><\/strong><\/p>\n\n\n\n

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  1. Distance from camera to computer<\/li>\n\n\n\n
  2. Data rate in which the camera is transmitting  <\/li>\n\n\n\n
  3. Importance of reliability of application <\/li>\n\n\n\n
  4. Structural integrity of connection at camera and computer<\/li>\n\n\n\n
  5. Total cost of your process and \/ or down time<\/li>\n<\/ol>\n\n\n\n

    From many years of diagnosing industrial imaging problems, especially after incorrect software setup, BAD CABLES ARE NEXT ON THE LIST FOR  \u201cMY CAMERA DOESN\u2019T WORK\u201d <\/strong>problems!! (Inadequate lighting or sub-optimal lensing also come up, but those are topics for another day.)
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    Distance, the killing factor!  If you were to look at a “bode plot<\/a>” of the signal transmitting from the camera to the computer you would see dramatic attenuation of the signal vs. distance, and also versus the data rate. In fact, at the distance limits, you might wonder if it actually works as the signal is so low! <\/p>\n\n\n\n

    GigE is rated at 100 meters, however, the signal does degrade quite a bit, so cable quality and data rate will be the determining factors.  USB3 does not have a real specification and it is difficult to find consumer grade cables greater than 2 meters in length. In fact, we have experienced poor results with consumer cables greater than 1 meter in length!<\/p>\n\n\n\n

    \"\"<\/figure>\n\n\n\n

    Click here for all USB3 Industrial camera cables<\/a><\/strong><\/p>\n\n\n\n

    Click here for all GigE Industrial camera cables<\/a><\/strong><\/p>\n\n\n\n

    What are the differences between \u2018Industrial\u2019 and \u2018\u2019consumer\u2019 cables?  <\/strong><\/p>\n\n\n\n

    8 differences are listed below: <\/strong><\/p>\n\n\n

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    \"\"
    Assorted machine vision cables<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n
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    1. Industrial cables are tested to a specification for each cable.  There are no batch to batch differences. <\/li>\n\n\n\n
    2. That specification usually meets organization requirements such as IEEE or Automated Imaging Association (AIA) standards<\/li>\n\n\n\n
    3. Industrial cables give you consistency from a single manufacturer (when buying online, you are not always sure you are getting the same cable)<\/li>\n\n\n\n
    4. Industrial cables have over-molded connectors<\/li>\n\n\n\n
    5. Industrial cables have screw locks on the ends<\/li>\n\n\n\n
    6. Industrial cables are usually made with larger gauge wire<\/li>\n\n\n\n
    7. Industrial cables typically specify bend radius<\/li>\n\n\n\n
    8. Industrial cables are made with flex requirements (bend cycles they can meet)<\/li>\n<\/ol>\n\n\n\n

      When should we consider using an \u201cIndustrial cable\u201d?  Here are a few examples to consider:<\/strong><\/p>\n\n\n\n

      Example 1:<\/strong> In a research lab, using a microscope 1 meter from the computer running low data rates, non automated.<\/em><\/p>\n\n\n\n

      Distance is small, data rate is low, chance of someone pulling on the cable is low, and if the data doesn\u2019t get delivered, you can re-acquire the image. There is no big need for a special cable and can buy it off the internet.<\/p>\n\n\n\n

      Example 1a:<\/strong> Let\u2019s change some of these parameters, now assuming you are not in lab, but the microscope is in an OEM instrument being shipped all over the world<\/em>. <\/p>\n\n\n\n

      If the system fails because you went with an unspecified cable, what is the cost of sending someone to fix this system 3000 miles away? In this situation, even though the distance is small, and the data rate is low, the consequences of a cable failure are very high!<\/p>\n\n\n\n

      Example 2<\/strong>: GigE cameras running at close to the full bandwidth. If you don\u2019t need screw lock connectors, and the distance is not too great (< 10 or 20 meters), <\/em><\/p>\n\n\n\n

      You can probably get by with \u2018higher quality\u2019 consumer cables. At distances greater than 20 meters, if you care about system reliability, you will definitely want industrial cables.  <\/p>\n\n\n\n

      Example 3.<\/strong> Two to Four GigE cameras running at close to full bandwidth in a system.<\/em><\/p>\n\n\n\n

      If you need system repeatability, or anything close to determinism, you will need industrial cables. On the other hand, if you your application is not sensitive to packet re-sends, a consumer cable should work at under 20 meters<\/p>\n\n\n\n

      Example 4<\/strong>. GigE cameras in an instrument.  Regular GigE cables are just locked into the RJ45 with a plastic tab. <\/em><\/p>\n\n\n\n

      If your product is being shipped, you can\u2019t rely on this not to break. You want an industrial cable with screw locks.<\/p>\n\n\n\n

      Example 5<\/strong>. GigE cameras in a lab. <\/em><\/p>\n\n\n\n

      Save the money and use a consumer cable!<\/p>\n\n\n\n

      Key takeaways:<\/p>\n\n\n\n