{"action":"created","issue":{"url":"https://api.github.com/repos/cleanflight/cleanflight/issues/1322","labels_url":"https://api.github.com/repos/cleanflight/cleanflight/issues/1322/labels{/name}","comments_url":"https://api.github.com/repos/cleanflight/cleanflight/issues/1322/comments","events_url":"https://api.github.com/repos/cleanflight/cleanflight/issues/1322/events","html_url":"https://github.com/cleanflight/cleanflight/issues/1322","id":107296652,"number":1322,"title":"SPF3/Kiss30 Calibration issue","user":{"login":"Johnno88","id":14343518,"avatar_url":"https://avatars.githubusercontent.com/u/14343518?v=3","gravatar_id":"","url":"https://api.github.com/users/Johnno88","html_url":"https://github.com/Johnno88","followers_url":"https://api.github.com/users/Johnno88/followers","following_url":"https://api.github.com/users/Johnno88/following{/other_user}","gists_url":"https://api.github.com/users/Johnno88/gists{/gist_id}","starred_url":"https://api.github.com/users/Johnno88/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Johnno88/subscriptions","organizations_url":"https://api.github.com/users/Johnno88/orgs","repos_url":"https://api.github.com/users/Johnno88/repos","events_url":"https://api.github.com/users/Johnno88/events{/privacy}","received_events_url":"https://api.github.com/users/Johnno88/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":8,"created_at":"2015-09-18T23:50:47Z","updated_at":"2015-10-02T13:12:35Z","closed_at":null,"body":"I have found  an issue when setting up a clean firmware install, either 1.9 or 1.10. If i go through the normal steps of Firmware, Ports, Config, Receiver, Motors, and then CLI adjustments all seams to work ok.\r\n\r\nIf however i try to calibrate motors/esc AFTER i have set Looptime=1200,  the motors/esc fail to calibrate.  Further, if i then try to test the motors in this state, i get no reaction until the throttle is approx half, then the motors jump into life at 100% force, in reverse direction and the only way to stop them is to disconnect the main battery.\r\n\r\nI have tested  this at different loop time settings, 3500-1600 all seam to work ok, but as soon as i use 1200 in the process, the fault occurs. \r\n\r\nCLI Dumps attached.\r\n1. Set looptime=1600 and no problems\r\n2. set looptime=1200, THEN tried calibrating and failed, fault occurred, and then took the CLI Dump.\r\n\r\n![cf1 10 1600 without fault](https://cloud.githubusercontent.com/assets/14343518/9973769/158497d6-5ebc-11e5-9794-2d3cb88d67e2.jpg)\r\n![cf1 10 1200 after fault](https://cloud.githubusercontent.com/assets/14343518/9973770/1a477b1c-5ebc-11e5-80fe-9d18f6aeff7c.jpg)\r\n\r\n\r\n\r\n\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/cleanflight/cleanflight/issues/comments/145016385","html_url":"https://github.com/cleanflight/cleanflight/issues/1322#issuecomment-145016385","issue_url":"https://api.github.com/repos/cleanflight/cleanflight/issues/1322","id":145016385,"user":{"login":"borisbstyle","id":10757508,"avatar_url":"https://avatars.githubusercontent.com/u/10757508?v=3","gravatar_id":"","url":"https://api.github.com/users/borisbstyle","html_url":"https://github.com/borisbstyle","followers_url":"https://api.github.com/users/borisbstyle/followers","following_url":"https://api.github.com/users/borisbstyle/following{/other_user}","gists_url":"https://api.github.com/users/borisbstyle/gists{/gist_id}","starred_url":"https://api.github.com/users/borisbstyle/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/borisbstyle/subscriptions","organizations_url":"https://api.github.com/users/borisbstyle/orgs","repos_url":"https://api.github.com/users/borisbstyle/repos","events_url":"https://api.github.com/users/borisbstyle/events{/privacy}","received_events_url":"https://api.github.com/users/borisbstyle/received_events","type":"User","site_admin":false},"created_at":"2015-10-02T13:12:35Z","updated_at":"2015-10-02T13:12:35Z","body":"@ctzsnooze What you are describing there sounds like a know blheli bug on refresh rates >1khz.\r\nDid you upgrade to blheli 14.1 or 14.2....not sure what the latest was.\r\n\r\n@hydra \r\nLow looptimes can have some very high jitter what can confuse some ESC's and especially ones with auto detections.\r\nI suggest them to try to calibrate with more stable looptimes. Depending on FC and pid controller etc this can be different. Naze32 for example needs >1200\r\nI have done some work in betaflight to make the control loop more efficient and stable so the jitter doesn't occur on lower looptimes. Maybe something for the future."}}