{"action":"created","issue":{"url":"https://api.github.com/repos/alexrj/Slic3r/issues/2960","labels_url":"https://api.github.com/repos/alexrj/Slic3r/issues/2960/labels{/name}","comments_url":"https://api.github.com/repos/alexrj/Slic3r/issues/2960/comments","events_url":"https://api.github.com/repos/alexrj/Slic3r/issues/2960/events","html_url":"https://github.com/alexrj/Slic3r/issues/2960","id":91841061,"number":2960,"title":"Gapfill problem with thin walls","user":{"login":"teppix","id":1038040,"avatar_url":"https://avatars.githubusercontent.com/u/1038040?v=3","gravatar_id":"","url":"https://api.github.com/users/teppix","html_url":"https://github.com/teppix","followers_url":"https://api.github.com/users/teppix/followers","following_url":"https://api.github.com/users/teppix/following{/other_user}","gists_url":"https://api.github.com/users/teppix/gists{/gist_id}","starred_url":"https://api.github.com/users/teppix/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/teppix/subscriptions","organizations_url":"https://api.github.com/users/teppix/orgs","repos_url":"https://api.github.com/users/teppix/repos","events_url":"https://api.github.com/users/teppix/events{/privacy}","received_events_url":"https://api.github.com/users/teppix/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":12,"created_at":"2015-06-29T15:46:23Z","updated_at":"2015-07-08T22:24:56Z","closed_at":null,"body":"I think that the gapfill feature may be producing too wide extrusions, and needs to be configurable.\r\n\r\nThese tests were done in 1.2.9.\r\n\r\nThis model shows the problem really well.\r\nhttps://dl.dropboxusercontent.com/u/448992/github/idler.stl\r\nSlic3r profiles are linked below the images.\r\n\r\nNote that the inner walls of the object is slanted in some places, which causes the gap fill to vary along the height.\r\n\r\nHere is the result when using automatic width for perimeters:\r\n![idler_a](https://cloud.githubusercontent.com/assets/1038040/8409132/a6f85766-1e75-11e5-9a85-4d0c7587d1cb.jpg)\r\nSlic3r profile: https://dl.dropboxusercontent.com/u/448992/github/slicer_gapfill_issue/idler_a.ini\r\n\r\nThe measurements are pretty accurate, apart from the obvious bulge on the middle of the part. This bulge coincides with the layers where the gap-fill is made. The g-code shows perfect sides, but I believe that the problem is caused by the gap fill pushing the perimeters apart.\r\n\r\nI can work around the problem by manually tweaking extrusion width for perimeters, but that seems to introduce other inaccuracies in the model like the perimeters becoming inaccurate. i have calibrated the extrusion multiplier, so I don't think that's the problem.\r\n\r\nThis is the result with manually set 0.5 mm perimeters.\r\n![idler_b](https://cloud.githubusercontent.com/assets/1038040/8411508/8ede2b1a-1e84-11e5-9a66-a63a7dbba8ab.jpg)\r\nSlic3r profile: https://dl.dropboxusercontent.com/u/448992/github/slicer_gapfill_issue/idler_b.ini\r\n\r\nYou can clearly see that the thickness of the rim is affected (guess this is another issue though).\r\n\r\nI'll add more information if needed, but I think this is enough to be able to reproduce the problem."},"comment":{"url":"https://api.github.com/repos/alexrj/Slic3r/issues/comments/119748607","html_url":"https://github.com/alexrj/Slic3r/issues/2960#issuecomment-119748607","issue_url":"https://api.github.com/repos/alexrj/Slic3r/issues/2960","id":119748607,"user":{"login":"teppix","id":1038040,"avatar_url":"https://avatars.githubusercontent.com/u/1038040?v=3","gravatar_id":"","url":"https://api.github.com/users/teppix","html_url":"https://github.com/teppix","followers_url":"https://api.github.com/users/teppix/followers","following_url":"https://api.github.com/users/teppix/following{/other_user}","gists_url":"https://api.github.com/users/teppix/gists{/gist_id}","starred_url":"https://api.github.com/users/teppix/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/teppix/subscriptions","organizations_url":"https://api.github.com/users/teppix/orgs","repos_url":"https://api.github.com/users/teppix/repos","events_url":"https://api.github.com/users/teppix/events{/privacy}","received_events_url":"https://api.github.com/users/teppix/received_events","type":"User","site_admin":false},"created_at":"2015-07-08T22:24:56Z","updated_at":"2015-07-08T22:24:56Z","body":"@joecarpita \r\n\r\ni think it's very likely that the problem in picture B is the same.\r\n\r\nIn picture C you get other errors, simply becaulse slic3r doesn't check for perimeter collisions, so you may get too much extrusions there also, but that's expected. The assymetry is probably caused by pressure buildup in the extruder along the extrusion path. Part of the pressure problem might go away by increasing temperature and/or decreasing speed (assuming you are printing at lower temperatures now, i.e. 190-200 C)."}}