{"action":"created","issue":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/1954","labels_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/1954/labels{/name}","comments_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/1954/comments","events_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/1954/events","html_url":"https://github.com/MarlinFirmware/Marlin/issues/1954","id":69933387,"number":1954,"title":"Missunderstandings in G-Code interpretation","user":{"login":"HardRainbow","id":10797066,"avatar_url":"https://avatars.githubusercontent.com/u/10797066?v=3","gravatar_id":"","url":"https://api.github.com/users/HardRainbow","html_url":"https://github.com/HardRainbow","followers_url":"https://api.github.com/users/HardRainbow/followers","following_url":"https://api.github.com/users/HardRainbow/following{/other_user}","gists_url":"https://api.github.com/users/HardRainbow/gists{/gist_id}","starred_url":"https://api.github.com/users/HardRainbow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/HardRainbow/subscriptions","organizations_url":"https://api.github.com/users/HardRainbow/orgs","repos_url":"https://api.github.com/users/HardRainbow/repos","events_url":"https://api.github.com/users/HardRainbow/events{/privacy}","received_events_url":"https://api.github.com/users/HardRainbow/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/labels/Potential%20bug?","name":"Potential bug?","color":"eb6420"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":50,"created_at":"2015-04-21T19:41:59Z","updated_at":"2015-05-12T20:54:57Z","closed_at":null,"body":"Hello everybody,\r\n\r\ni made an CBC-\"Milling\" Machine by myself. It also can print in 3D if i had made an extruder ;-). I decided to use Marlin as Firmware on an Arduino-Board with a RAMPS-Shield 1.4 on it. It works pretty well but i got some annoying fails on milling with Marlin (i already know: \"its not designed for that\")...\r\n\r\nAt First:\r\nI used some Python-Script to convert PyCam ngc Code into RepRap-Gcode for 3D Printers (scaled-down settings / add Z axis and movement Speeds while Cutting / Traveling). The Result could be watched here: https://www.dropbox.com/s/iyifm093criudfr/VirToGravTest4_converted.gcode?dl=0 (converted)\r\nOriginal: https://www.dropbox.com/s/em8l3p4eqd9uimg/VirToGravTest4.ngc?dl=0\r\n\r\nIt works pritty awesome except of these 4 faults:\r\n![dscn3120](https://cloud.githubusercontent.com/assets/10797066/7261067/26cb6880-e86f-11e4-9c60-3ba8eb6b5ef2.JPG) (Dont mention that letters in the background)\r\n\r\nVir(T)oGrav:\r\nThe letter \"T\" got an smaller right \"outrigger\"\r\n\r\nVirT(o)Grav:\r\nThe surrounding of the letter \"O\" dont stop at its starting point\r\n\r\nVirToG(r)av:\r\nThe surrounding of the letter \"r\" dront stop at its starting point\r\n\r\nVirToGr(a)v:\r\nThe \"a\" also got some awkward issues with its surrounding \r\n\r\nI dont know why this happens, but it happens all the time, i made this milling 18x Times with always the same Results. I tried different speeds, differed jerk values, different highs, at last i let a pen draw the lines ;-).. always the same result.\r\n\r\nThen i got a clou from a friend of mine:\r\nI use auto-bed-leveling to recalculate the large milling area (600x380mm) because its terrible uneven. With auto-bed-leveling its quiet great! (awesome feature btw.). The Idea was, these calculation in X Y because of the uneven bed will cause fluctuations in calculating the axes (because auto-bed-leveling is still under process (i thought)). So i tried without -> same result ;-(\r\n\r\nI'm out of ideas and tired of this Problem... the gcode looks okay to me, cant see the issue until it became reality. Maybe someone can see something, maybe its an issue in Marlin.. \r\nI can only guarantee one thing: it is not of mechanical nature\r\n\r\n"},"comment":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/comments/101416874","html_url":"https://github.com/MarlinFirmware/Marlin/issues/1954#issuecomment-101416874","issue_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/1954","id":101416874,"user":{"login":"HardRainbow","id":10797066,"avatar_url":"https://avatars.githubusercontent.com/u/10797066?v=3","gravatar_id":"","url":"https://api.github.com/users/HardRainbow","html_url":"https://github.com/HardRainbow","followers_url":"https://api.github.com/users/HardRainbow/followers","following_url":"https://api.github.com/users/HardRainbow/following{/other_user}","gists_url":"https://api.github.com/users/HardRainbow/gists{/gist_id}","starred_url":"https://api.github.com/users/HardRainbow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/HardRainbow/subscriptions","organizations_url":"https://api.github.com/users/HardRainbow/orgs","repos_url":"https://api.github.com/users/HardRainbow/repos","events_url":"https://api.github.com/users/HardRainbow/events{/privacy}","received_events_url":"https://api.github.com/users/HardRainbow/received_events","type":"User","site_admin":false},"created_at":"2015-05-12T20:54:57Z","updated_at":"2015-05-12T20:54:57Z","body":"@brainscan \r\nthe picture was not completely flat (not much space in my cellar ;-), took the paper home and here we are:\r\n![2015-05-12 22 45 34](https://cloud.githubusercontent.com/assets/10797066/7598339/e578a62c-f8f9-11e4-9efe-eb0b52250294.jpg)\r\n"}}