{"id":10079011,"date":"2020-07-03T09:06:36","date_gmt":"2020-07-03T14:06:36","guid":{"rendered":"https:\/\/www.erbessd-instruments.com\/docs\/digivibemx\/digivibe-10\/resolution-points-max-frequency-and-bearings"},"modified":"2021-12-17T12:19:57","modified_gmt":"2021-12-17T17:19:57","slug":"resolution-points-max-frequency-and-bearings","status":"publish","type":"docs","link":"https:\/\/www.erbessd-instruments.com\/fr\/docs\/digivibemx\/digivibe-10\/resolution-points-max-frequency-and-bearings\/","title":{"rendered":"Resolution Points, Max Frequency and Bearings"},"content":{"rendered":"\t\t
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To increase the number of Resolution points (lines) there are 2 methods:<\/p>

  • increase the Sample Rate (with old interfaces i400-i500-i600-i800)<\/li>
  • increase the Recording Time (only method available for GX400 4 channel interface)<\/li><\/ul>

    To increase the Max Frequency, there is 1 method:<\/p>

    • increase the Sample Rate, select “Setup” and “Config” :<\/li><\/ul>

      <\/p>


      Examples:<\/p>

      With a Sample rate s\/s = 11025 and Recording time 3s <\/p>

      With a Sample rate s\/s = 11025 and Recording time 12s <\/p>

      With a Sample rate s\/s = 22050 and Recording time 3s\u00a0 <\/p>

      With a Sample rate s\/s = 22050 and Recording time 12s <\/p>

      With a Sample rate s\/s = 44100 and Recording time 3s <\/p>

      With a Sample rate s\/s = 44100 and Recording time 12s\u00a0<\/p>


      The higher the Recording Time <\/strong>is, better Resolution between points you will get. In these examples, the resolution is improved from 20.19 CPM between 2 points with 3s recording to 5.05 CPM between 2 points. With a Sample rate of 44100 s\/s and a Recording Time <\/strong>of 96 seconds (1 minute 36 seconds), you achieve:<\/p>

      • more than 2 million resolution points<\/li>
      • Max frequency of 17 kHz or 1.3 million CPM<\/li>
      • 63 CPM between points<\/li><\/ul>


        Of course, depending on the sensor, it makes sense or not to measure with such precision. These long recordings consume more machine resources in terms of memory space and processing.<\/p>

        Setting a new bearing into the database<\/h1>

        When you create a new machine in the database (or when you edit its configuration) you can add the bearing’s information on the corresponding area:

        If one of the bearings of the machine is not in the 25’000 items database, you can add the frequency information manually:

        Contact the bearing manufacturer website to be informed about the frequencies in “orders”:<\/p>

        • BPFI (Ball passing frequency inner race)<\/li>
        • BPFO (Ball passing frequency outer race)<\/li>
        • BSF (Ball spin frequency)<\/li>
        • FTF (Fundamental train frequency)<\/li><\/ul>

          Example:
          BPFI = 0.55-0.6 x No. of balls x RPM BPFO=0.45 x No. of balls x RPM BSF = 3.5 x RPM<\/p>

          In this example, we have a recording of vibration on point 1-H:<\/p>

          • select the rotation speed (1797 CPM)<\/li>
          • select the bearing of this point<\/li>
          • click on \u201cFrequency calculate\u201d<\/li>
          • click on \u201cShow Markers\u201d to plot the damage frequencies on the FFT graphic<\/li><\/ul>


            You can right-click on each graphic to add and print it to the report.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"featured_media":0,"parent":10078712,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","doc_tag":[],"class_list":["post-10079011","docs","type-docs","status-publish","hentry"],"acf":[],"yoast_head":"\nResolution Points, Max Frequency and Bearings \u2013 ERBESSD<\/title>\n<meta name=\"description\" content=\"ERBESSD INSTRUMENTS Tutorials for Digivibe 10 Resolution Points, Max Frequency and Bearings\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.erbessd-instruments.com\/it\/docs\/digivibemx\/digivibe-10\/resolution-points-max-frequency-and-bearings\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" 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