{"action":"created","issue":{"url":"https://api.github.com/repos/kriswiner/MPU-9250/issues/44","repository_url":"https://api.github.com/repos/kriswiner/MPU-9250","labels_url":"https://api.github.com/repos/kriswiner/MPU-9250/issues/44/labels{/name}","comments_url":"https://api.github.com/repos/kriswiner/MPU-9250/issues/44/comments","events_url":"https://api.github.com/repos/kriswiner/MPU-9250/issues/44/events","html_url":"https://github.com/kriswiner/MPU-9250/issues/44","id":136924508,"number":44,"title":"When IMU moves in 2-D Plane (YZ), accelerometer measures acceleration in third axis (X axis) too?","user":{"login":"mohit5037","id":8141787,"avatar_url":"https://avatars.githubusercontent.com/u/8141787?v=3","gravatar_id":"","url":"https://api.github.com/users/mohit5037","html_url":"https://github.com/mohit5037","followers_url":"https://api.github.com/users/mohit5037/followers","following_url":"https://api.github.com/users/mohit5037/following{/other_user}","gists_url":"https://api.github.com/users/mohit5037/gists{/gist_id}","starred_url":"https://api.github.com/users/mohit5037/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mohit5037/subscriptions","organizations_url":"https://api.github.com/users/mohit5037/orgs","repos_url":"https://api.github.com/users/mohit5037/repos","events_url":"https://api.github.com/users/mohit5037/events{/privacy}","received_events_url":"https://api.github.com/users/mohit5037/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":4,"created_at":"2016-02-27T14:24:01Z","updated_at":"2016-02-27T18:29:31Z","closed_at":null,"body":"I am moving my IMU in YZ plane but it accelerometer is measuring considerable acceleration in X axis as well which very closely follows acceleration curve of Y axis.\r\n\r\nI am drawing a semi-circle in YZ plane with y-axis as diameter of semi-circle.\r\n\r\nHere is the gravity free acceleration curves of all 3 axes:\r\n\r\n![accelertions](https://cloud.githubusercontent.com/assets/8141787/13373334/9bca2128-dd8b-11e5-9ceb-7172b37e86eb.png)\r\n\r\nYou can see that acceleration in x-axis is of considerable magnitude, so I can't treat it as a noise.\r\n\r\nPlease help as I am stuck with this problem since 10 days."},"comment":{"url":"https://api.github.com/repos/kriswiner/MPU-9250/issues/comments/189699297","html_url":"https://github.com/kriswiner/MPU-9250/issues/44#issuecomment-189699297","issue_url":"https://api.github.com/repos/kriswiner/MPU-9250/issues/44","id":189699297,"user":{"login":"kriswiner","id":6698410,"avatar_url":"https://avatars.githubusercontent.com/u/6698410?v=3","gravatar_id":"","url":"https://api.github.com/users/kriswiner","html_url":"https://github.com/kriswiner","followers_url":"https://api.github.com/users/kriswiner/followers","following_url":"https://api.github.com/users/kriswiner/following{/other_user}","gists_url":"https://api.github.com/users/kriswiner/gists{/gist_id}","starred_url":"https://api.github.com/users/kriswiner/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/kriswiner/subscriptions","organizations_url":"https://api.github.com/users/kriswiner/orgs","repos_url":"https://api.github.com/users/kriswiner/repos","events_url":"https://api.github.com/users/kriswiner/events{/privacy}","received_events_url":"https://api.github.com/users/kriswiner/received_events","type":"User","site_admin":false},"created_at":"2016-02-27T18:29:31Z","updated_at":"2016-02-27T18:29:31Z","body":"Close to zero should mean a few milliG on x and y. Even then, one expects\nsome cross axis contamination at about 1% or maybe less. I haven't seen this\nkind of behavior but I usually do not look at just acceleration.\n\nOne thing, is the MPU9250 mounted at the center of your board? Because\nrotations about some radius even without any linear acceleration will show\nup as a linear acceleration component.\n\n-----Original Message-----\nFrom: mohit5037 [mailto:notifications@github.com] \nSent: February 27, 2016 10:11 AM\nTo: kriswiner/MPU-9250\nCc: Kris Winer\nSubject: Re: [MPU-9250] When IMU moves in 2-D Plane (YZ), accelerometer\nmeasures acceleration in third axis (X axis) too? (#44)\n\nHi kris,\n\nYes I did calibrate my accelerometer by uploading the raw sensor data code\nto board and taking mean of 1000 values after 30-40 secs when it was\nstabilised.\n\nThen I called the setAcceloffset() functions with those mean values to set\naccelero and gyro offsets. Then I again checked mean and they were close to\nzero except Z which was close to 16384.\n\nThanks\n\n-\nReply to this email directly or view it on GitHub\n<https://github.com/kriswiner/MPU-9250/issues/44#issuecomment-189697512> .\n<https://github.com/notifications/beacon/AGY1qtAAU7z22nztK0NZqOTEo-5VkAjmks5\npod4lgaJpZM4Hkf1B.gif> \n\n\n"}}