{"id":3556,"date":"2015-11-10T03:05:51","date_gmt":"2015-11-10T11:05:51","guid":{"rendered":""},"modified":"2020-08-08T11:57:38","modified_gmt":"2020-08-08T18:57:38","slug":"3556","status":"publish","type":"post","link":"https:\/\/www.vernier.com\/til\/3556","title":{"rendered":"Motion Encoder System readings only increase or only decrease."},"content":{"rendered":"

Occasionally the motion encoder system will work as a ratchet, with readings only increasing or only decreasing. This is not a setting in Logger Pro<\/i> or LabQuest App; no software change can create the problem. The issue is between the detectors on the cart and the receiver.<\/p>\n

Try these things to troubleshoot, in order, testing after each step:<\/p>\n

    \n
  1. Confirm that the receiver is firmly in the the track grooves and is not out of alignment.<\/li>\n
  2. Turn out the room lights to see if there is an interfering light source.<\/li>\n
  3. Run the LabQuest or computer on batteries to check for a noisy power supply.<\/li>\n
  4. Look for an obstruction on one of the sensors on the underside of the cart.<\/li>\n
  5. Look for an obstruction over the transmitting LED (not the blue power light)<\/li>\n
  6. Put fresh batteries in the transmitting cart.<\/li>\n
  7. If you are using a 2.2 m track, confirm that the range switch on the underside of the cart (by the batteries) is set to 2 m.<\/li>\n
  8. Use a different cart with the same receiver. If that resolves the problem, the cart needs repair.<\/li>\n
  9. Use a different receiver with the same cart. If that resolves the problem, the receiver needs repair.<\/li>\n
  10. If no additional cart\/receiver pairs are available for testing, contact Technical Support to set up a repair for both the cart and receiver.<\/li>\n<\/ol>\n

    Other issues with the motion encoder system include
    \nMotion Encoder zero drifts when used with LabQuest App on AC power.<\/a>
    \n    Motion Encoder does not measure distances over 1.2 meters.<\/a>
    \n    Motion Encoder Cart turns on but does not register motion.<\/a>
    \n<\/p>","protected":false},"excerpt":{"rendered":"

    Occasionally the motion encoder system will work as a ratchet, with readings only increasing or only decreasing. This is not a setting in Logger Pro…<\/p>\n","protected":false},"author":31,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[],"tags":[3042,5354],"class_list":["post-3556","post","type-post","status-publish","format-standard","hentry","tag-dts-ec","tag-vds-ec"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/3556","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/users\/31"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/comments?post=3556"}],"version-history":[{"count":0,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/posts\/3556\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/media?parent=3556"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/categories?post=3556"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vernier.com\/til\/wp-json\/wp\/v2\/tags?post=3556"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}