{"action":"created","issue":{"url":"https://api.github.com/repos/repetier/Repetier-Firmware/issues/499","repository_url":"https://api.github.com/repos/repetier/Repetier-Firmware","labels_url":"https://api.github.com/repos/repetier/Repetier-Firmware/issues/499/labels{/name}","comments_url":"https://api.github.com/repos/repetier/Repetier-Firmware/issues/499/comments","events_url":"https://api.github.com/repos/repetier/Repetier-Firmware/issues/499/events","html_url":"https://github.com/repetier/Repetier-Firmware/issues/499","id":141564571,"number":499,"title":"Strange jerky movements","user":{"login":"Megane008","id":2848488,"avatar_url":"https://avatars.githubusercontent.com/u/2848488?v=3","gravatar_id":"","url":"https://api.github.com/users/Megane008","html_url":"https://github.com/Megane008","followers_url":"https://api.github.com/users/Megane008/followers","following_url":"https://api.github.com/users/Megane008/following{/other_user}","gists_url":"https://api.github.com/users/Megane008/gists{/gist_id}","starred_url":"https://api.github.com/users/Megane008/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Megane008/subscriptions","organizations_url":"https://api.github.com/users/Megane008/orgs","repos_url":"https://api.github.com/users/Megane008/repos","events_url":"https://api.github.com/users/Megane008/events{/privacy}","received_events_url":"https://api.github.com/users/Megane008/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":3,"created_at":"2016-03-17T12:08:01Z","updated_at":"2016-03-18T14:09:24Z","closed_at":null,"body":"Im having problem with Repetier, probably path planner. \r\nThe printer moves without problems in dry run mode. But when I print it makes jerky movements. \r\nIncreasing acceleration helps ( but it only helps because of higher velocity mass )\r\nIm using delta printer with Ramps 1.4 board, standard onboard drivers for XYZ\r\nusing acceleration 1000, Jerk 20 ( triied modifing up and down but no help ) \r\nA bit improvement if I decrased extruder acceleration from 5000 to 1000 but still a bit jerky movement. \r\nIm using 3 extruders wired trough external stepper drivers Toshiba ( I had to manualy switch step HIGH/LOW in firmware to make them work )\r\nI triied diferent temperature control even simple bang-bang but still the same. \r\n\r\nAny Idea what could be an issue? "},"comment":{"url":"https://api.github.com/repos/repetier/Repetier-Firmware/issues/comments/198376232","html_url":"https://github.com/repetier/Repetier-Firmware/issues/499#issuecomment-198376232","issue_url":"https://api.github.com/repos/repetier/Repetier-Firmware/issues/499","id":198376232,"user":{"login":"jamesarm97","id":929192,"avatar_url":"https://avatars.githubusercontent.com/u/929192?v=3","gravatar_id":"","url":"https://api.github.com/users/jamesarm97","html_url":"https://github.com/jamesarm97","followers_url":"https://api.github.com/users/jamesarm97/followers","following_url":"https://api.github.com/users/jamesarm97/following{/other_user}","gists_url":"https://api.github.com/users/jamesarm97/gists{/gist_id}","starred_url":"https://api.github.com/users/jamesarm97/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jamesarm97/subscriptions","organizations_url":"https://api.github.com/users/jamesarm97/orgs","repos_url":"https://api.github.com/users/jamesarm97/repos","events_url":"https://api.github.com/users/jamesarm97/events{/privacy}","received_events_url":"https://api.github.com/users/jamesarm97/received_events","type":"User","site_admin":false},"created_at":"2016-03-18T14:09:24Z","updated_at":"2016-03-18T14:09:24Z","body":"I was going to recommend the RADDS board plus expansion but that would only get you 5 extruders. http://doku.radds.org/dokumentation/radds/ "}}