{"action":"created","issue":{"url":"https://api.github.com/repos/learn2develop/hx711py/issues/1","repository_url":"https://api.github.com/repos/learn2develop/hx711py","labels_url":"https://api.github.com/repos/learn2develop/hx711py/issues/1/labels{/name}","comments_url":"https://api.github.com/repos/learn2develop/hx711py/issues/1/comments","events_url":"https://api.github.com/repos/learn2develop/hx711py/issues/1/events","html_url":"https://github.com/learn2develop/hx711py/issues/1","id":340964942,"node_id":"MDU6SXNzdWUzNDA5NjQ5NDI=","number":1,"title":"No effect of offset and scale","user":{"login":"robster0326","id":4252654,"node_id":"MDQ6VXNlcjQyNTI2NTQ=","avatar_url":"https://avatars3.githubusercontent.com/u/4252654?v=4","gravatar_id":"","url":"https://api.github.com/users/robster0326","html_url":"https://github.com/robster0326","followers_url":"https://api.github.com/users/robster0326/followers","following_url":"https://api.github.com/users/robster0326/following{/other_user}","gists_url":"https://api.github.com/users/robster0326/gists{/gist_id}","starred_url":"https://api.github.com/users/robster0326/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/robster0326/subscriptions","organizations_url":"https://api.github.com/users/robster0326/orgs","repos_url":"https://api.github.com/users/robster0326/repos","events_url":"https://api.github.com/users/robster0326/events{/privacy}","received_events_url":"https://api.github.com/users/robster0326/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":52,"created_at":"2018-07-13T10:22:33Z","updated_at":"2018-11-29T05:51:41Z","closed_at":null,"author_association":"NONE","body":"Hi!\r\n\r\nI have difficulties getting the right values from my raspberry pi 3 + 4 strain gauges (50kg each) - Load Combinator - Load Cell Amplifier setup. After running calibration and modifying offset and scale in example.py, **i receive the same values regardless the values of offset and scale**. I see that the values are changing when i add more weight.\r\nThanks for your help!"},"comment":{"url":"https://api.github.com/repos/learn2develop/hx711py/issues/comments/442715014","html_url":"https://github.com/learn2develop/hx711py/issues/1#issuecomment-442715014","issue_url":"https://api.github.com/repos/learn2develop/hx711py/issues/1","id":442715014,"node_id":"MDEyOklzc3VlQ29tbWVudDQ0MjcxNTAxNA==","user":{"login":"NeonSpork","id":33250853,"node_id":"MDQ6VXNlcjMzMjUwODUz","avatar_url":"https://avatars3.githubusercontent.com/u/33250853?v=4","gravatar_id":"","url":"https://api.github.com/users/NeonSpork","html_url":"https://github.com/NeonSpork","followers_url":"https://api.github.com/users/NeonSpork/followers","following_url":"https://api.github.com/users/NeonSpork/following{/other_user}","gists_url":"https://api.github.com/users/NeonSpork/gists{/gist_id}","starred_url":"https://api.github.com/users/NeonSpork/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/NeonSpork/subscriptions","organizations_url":"https://api.github.com/users/NeonSpork/orgs","repos_url":"https://api.github.com/users/NeonSpork/repos","events_url":"https://api.github.com/users/NeonSpork/events{/privacy}","received_events_url":"https://api.github.com/users/NeonSpork/received_events","type":"User","site_admin":false},"created_at":"2018-11-29T05:51:41Z","updated_at":"2018-11-29T05:51:41Z","author_association":"CONTRIBUTOR","body":"I haven't made it yet which is why I had to make a png! Essentially I'm\njust talking about carving out a little notch underneath the load sensor so\nthe middle part can move freely up and down.\n\nOnce I get mine made I'll take a picture, which will probably explain what\nI mean better than my words are doing!\n\nOn Thu, Nov 29, 2018, 06:47 robster <notifications@github.com> wrote:\n\n> Do you have an image of the \"little square in the middle \" you mention\n> above?\n>\n> NeonSpork <notifications@github.com> ezt írta (időpont: 2018. nov. 29.,\n> Cs,\n> 6:27):\n>\n> > If it's on a completely flat surface you're going to experience a lot of\n> > random variation, ideally the little square in the middle should be free\n> to\n> > move up and down. The tension that arises when that part bends is how it\n> > measures the load. I'm personally going to use two cutting boards so I\n> can\n> > cut out a small hole underneath the sensors.\n> >\n> > I believe most of the load sensors have a precision of roughly 1,5%. All\n> > each sensor has a max load of 50kg, so that's the max load of the whole\n> > system, which would mean a variance of about 100g plus/minus would be\n> > reasonable in my mind :)\n> >\n> > On Thu, Nov 29, 2018, 06:02 robster <notifications@github.com> wrote:\n> >\n> > > THanks, i will try it maybe today. Also thanks for the suggestions. The\n> > > sensors are located on a completly flat surface and i put a cutting\n> board\n> > > on top of them, so everything is nice and flat. Yeps, that is also my\n> > > concern, that if the system has 4x50kg max limit, how can i precisely\n> > > measure a few kilos? It's crucial for me since i will measure bee hives\n> > > where i need to see the progress how the weight is growing. :)\n> > >\n> > > NeonSpork <notifications@github.com> ezt írta (időpont: 2018. nov.\n> 27.,\n> > K,\n> > > 23:00):\n> > >\n> > > > @robster0326 <https://github.com/robster0326> I believe the latest\n> > > merge (\n> > > > #6 <https://github.com/learn2develop/hx711py/pull/6>) should fix\n> your\n> > > > problems. Things to take into account:\n> > > >\n> > > > - Triple check your wiring: Remember that the wire colors used by\n> > > > various vendors vary *a lot*. For example mine was backwards compared\n> > > > to the sparkfun schematic\n> > > > <\n> > >\n> >\n> https://cdn.sparkfun.com/datasheets/Sensors/ForceFlex/SparkFun%20Load%20Sensor%20Combinator%20v11.pdf\n> > > >,\n> > > > specifically my white was their black and vice versa\n> > > > - Remember that in order to work properly the load sensors have to be\n> > > > placed over a socket that has been hollowed out. (I made a quick\n> > terrible\n> > > > .png trying to illustrate what I mean)\n> > > > - Essentially the little bit in the middle has to be able to move\n> > > > freely and independently of the C shaped outer arm\n> > > >\n> > > > Let me know how this all works out for you. Mine was reading a bit\n> > > > erratically, but it was producing gram values that were reasonable\n> for\n> > > what\n> > > > I was measuring, and seemed within the tolerance for the load sensor.\n> > If\n> > > > yours has a max weight of 50kg that can mean quite a bit of variation\n> > > > especially if the item you're weighing is light.\n> > > >\n> > > > Hope this helps! :)\n> > > >\n> > > > —\n> > > > You are receiving this because you were mentioned.\n> > > > Reply to this email directly, view it on GitHub\n> > > > <\n> > >\n> https://github.com/learn2develop/hx711py/issues/1#issuecomment-442233577\n> > >,\n> > > > or mute the thread\n> > > > <\n> > >\n> >\n> https://github.com/notifications/unsubscribe-auth/AEDj7gKrDRxbvgGuAoFCdlhAd-YoLzwDks5uzbXrgaJpZM4VOqI9\n> > > >\n> > > > .\n> > > >\n> > >\n> > > —\n> > > You are receiving this because you were mentioned.\n> > > Reply to this email directly, view it on GitHub\n> > > <\n> > https://github.com/learn2develop/hx711py/issues/1#issuecomment-442707427\n> >,\n> > > or mute the thread\n> > > <\n> >\n> https://github.com/notifications/unsubscribe-auth/AfteJaxZRHr3oQOSqXeKbF3afSSHDeHhks5uz2p4gaJpZM4VOqI9\n> > >\n> > > .\n> > >\n> >\n> > —\n> > You are receiving this because you were mentioned.\n> > Reply to this email directly, view it on GitHub\n> > <\n> https://github.com/learn2develop/hx711py/issues/1#issuecomment-442711152>,\n> > or mute the thread\n> > <\n> https://github.com/notifications/unsubscribe-auth/AEDj7qB-ky_H6j_QsFGZsCT_BlMzNaHkks5uz3BGgaJpZM4VOqI9\n> >\n> > .\n> >\n>\n> —\n> You are receiving this because you were mentioned.\n> Reply to this email directly, view it on GitHub\n> <https://github.com/learn2develop/hx711py/issues/1#issuecomment-442714373>,\n> or mute the thread\n> <https://github.com/notifications/unsubscribe-auth/AfteJZl-r3jTTfOjetoCSEHczPC0Iu0rks5uz3UIgaJpZM4VOqI9>\n> .\n>\n"}}
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