{"action":"created","issue":{"url":"https://api.github.com/repos/UnifiedEngineering/T-962-improvements/issues/89","repository_url":"https://api.github.com/repos/UnifiedEngineering/T-962-improvements","labels_url":"https://api.github.com/repos/UnifiedEngineering/T-962-improvements/issues/89/labels{/name}","comments_url":"https://api.github.com/repos/UnifiedEngineering/T-962-improvements/issues/89/comments","events_url":"https://api.github.com/repos/UnifiedEngineering/T-962-improvements/issues/89/events","html_url":"https://github.com/UnifiedEngineering/T-962-improvements/issues/89","id":143838041,"number":89,"title":"Initial Test Result","user":{"login":"duncanellison","id":1681591,"avatar_url":"https://avatars.githubusercontent.com/u/1681591?v=3","gravatar_id":"","url":"https://api.github.com/users/duncanellison","html_url":"https://github.com/duncanellison","followers_url":"https://api.github.com/users/duncanellison/followers","following_url":"https://api.github.com/users/duncanellison/following{/other_user}","gists_url":"https://api.github.com/users/duncanellison/gists{/gist_id}","starred_url":"https://api.github.com/users/duncanellison/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/duncanellison/subscriptions","organizations_url":"https://api.github.com/users/duncanellison/orgs","repos_url":"https://api.github.com/users/duncanellison/repos","events_url":"https://api.github.com/users/duncanellison/events{/privacy}","received_events_url":"https://api.github.com/users/duncanellison/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":16,"created_at":"2016-03-27T18:56:31Z","updated_at":"2016-04-28T17:39:49Z","closed_at":null,"body":"Not really sure where to post this as it's not really an 'issue' as such , but I've done some experiments with my oven that are as scientific as I can make them with my set up and thought I would share them.  Please feel free to move / edit / comment / delete as necessary.\r\n\r\nI have a T-962 (not 'A') with the original analogue TC1 and Tc2 flashed with Werner's latest 'master' code as at 27/3/16.\r\n\r\nI have not attempted to calibrate the TC's at all and all slopes and offsets are at 0.\r\nMin Fan Speed is set to 12.\r\n\r\nUsing the serial protocol on the T-962 and an accurate temperature logger with the TC fixed to a small PCB in the centre of the oven (mounted on pcb standoffs and with a small amount of thermal paste between a track on the board and the TC junction), this is what I got -\r\n\r\n![capture1](https://cloud.githubusercontent.com/assets/1681591/14067087/6e08962e-f45c-11e5-91f2-b9c2af73aec1.PNG)\r\n\r\nYellow is the setpoint tracking for SAC305.\r\nOrange and Grey are the two TC's\r\nBlue is the temp as reported by the oven (the average of TC1 and 2)\r\nGreen is the *actual* temperature at the board.\r\n\r\nInteresting points are -\r\n\r\n1) Between 55 and 115C and again at 163C to 217, the two thermocouples track almost perfectly, but outside that, they vary wildly with a really odd kink centered around 139C and in the cool down they are miles apart.\r\n\r\n2)  The actual board is slower to heat up than the setpoint by quite some margin, but does eventually reach the peak temp at about the right time.\r\n\r\n3) With these settings, the board gets around 13C hotter than the intended peak.\r\n\r\n4) The cool down rate of the board is way slower than the air temperature (which is to be expected), but means that you can't accurately rely on the oven reading to give you the cooling profile unless you have a TC on the actual board.\r\n\r\nI have one of the 4 channel digital boards arriving soon and will try to repeat the exercise to see how it compares.  I have a feeling that there's quite a bit of non linearity in the response of the analog TC circuit.\r\n\r\nI'm thinking that the only real way to go is to have the two additional TC's permanently fixed to sacrificial PCB's either side of the one I'm baking.\r\n\r\nComments welcome.\r\n\r\n  \r\n"},"comment":{"url":"https://api.github.com/repos/UnifiedEngineering/T-962-improvements/issues/comments/215505784","html_url":"https://github.com/UnifiedEngineering/T-962-improvements/issues/89#issuecomment-215505784","issue_url":"https://api.github.com/repos/UnifiedEngineering/T-962-improvements/issues/89","id":215505784,"user":{"login":"duncanellison","id":1681591,"avatar_url":"https://avatars.githubusercontent.com/u/1681591?v=3","gravatar_id":"","url":"https://api.github.com/users/duncanellison","html_url":"https://github.com/duncanellison","followers_url":"https://api.github.com/users/duncanellison/followers","following_url":"https://api.github.com/users/duncanellison/following{/other_user}","gists_url":"https://api.github.com/users/duncanellison/gists{/gist_id}","starred_url":"https://api.github.com/users/duncanellison/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/duncanellison/subscriptions","organizations_url":"https://api.github.com/users/duncanellison/orgs","repos_url":"https://api.github.com/users/duncanellison/repos","events_url":"https://api.github.com/users/duncanellison/events{/privacy}","received_events_url":"https://api.github.com/users/duncanellison/received_events","type":"User","site_admin":false},"created_at":"2016-04-28T17:39:49Z","updated_at":"2016-04-28T17:39:49Z","body":"Ah - I guess my L and R peppered in the GUI I wrote doesn't make much sense if you have a -A version then !  That's the downside of writing code for something you haven't seen.\r\n\r\nBelow is a full zip of everything in my LCPXpresso workspace, I wasn't sure how to export this properly, but hopefully you will be able to easily import it.  I just built, uploaded and tested it OK.\r\n\r\n[T-962-Controller.zip](https://github.com/UnifiedEngineering/T-962-improvements/files/241097/T-962-Controller.zip)\r\n\r\nYou sure it's nothing to do with your programmer settings (wrong frequency / part etc)\r\n\r\n"}}