{"action":"created","issue":{"url":"https://api.github.com/repos/alexrj/Slic3r/issues/3612","repository_url":"https://api.github.com/repos/alexrj/Slic3r","labels_url":"https://api.github.com/repos/alexrj/Slic3r/issues/3612/labels{/name}","comments_url":"https://api.github.com/repos/alexrj/Slic3r/issues/3612/comments","events_url":"https://api.github.com/repos/alexrj/Slic3r/issues/3612/events","html_url":"https://github.com/alexrj/Slic3r/issues/3612","id":194878924,"number":3612,"title":"Gap fill creating unreasonably thin extrusions","user":{"login":"VanessaE","id":1733537,"avatar_url":"https://avatars.githubusercontent.com/u/1733537?v=3","gravatar_id":"","url":"https://api.github.com/users/VanessaE","html_url":"https://github.com/VanessaE","followers_url":"https://api.github.com/users/VanessaE/followers","following_url":"https://api.github.com/users/VanessaE/following{/other_user}","gists_url":"https://api.github.com/users/VanessaE/gists{/gist_id}","starred_url":"https://api.github.com/users/VanessaE/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/VanessaE/subscriptions","organizations_url":"https://api.github.com/users/VanessaE/orgs","repos_url":"https://api.github.com/users/VanessaE/repos","events_url":"https://api.github.com/users/VanessaE/events{/privacy}","received_events_url":"https://api.github.com/users/VanessaE/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":1,"created_at":"2016-12-12T02:38:42Z","updated_at":"2016-12-12T02:49:52Z","closed_at":null,"body":"### Version\r\n\r\n11585b88d5a1063f28a17ae5a90698e2c23ddcda\r\n\r\n### Operating system type + version\r\n\r\nDebian 8.6\r\n\r\n### Behavior\r\n\r\nWhen slicing some objects, gap fill is created that's way too thin for the configured nozzle diameter.\r\n\r\nSince you can't reliably print a line thinner than the nozzle, and gap-fill is usually accompanied by retracts/restarts, you get a slightly-blobby, over-extruded line instead.  I guess the underlying layer \"drags\" extra plastic out of the nozzle, so if the next lines are supposed to be thick, they end up under-extruded slightly.\r\n\r\nAs you can see below, the attached model below only allows one perimeter between the interior of the model and the outside, so there's nowhere else for the extra plastic to go.\r\n\r\nI think what's needed here is a configurable lower limit to gap fill width.  Anything smaller should either be omitted entirely, or perhaps those spaces should be filled by altering the width and position of the offending perimeter segments (even if it means overriding a user-configured static value).\r\n\r\nExample screenshot below. Look between the middle circle and its two neighbors, and between the left-most circle and the straight line near it.  The thinnest of these segments is about 0.05 mm wide (by measuring from a screenshot of a much more zoomed-in view).  If you look below the middle circle, you can see a more reasonable gap fill width.\r\n![screenshot - 12112016 - 07 56 49 pm](https://cloud.githubusercontent.com/assets/1733537/21085131/9b6ad352-bfdb-11e6-90fd-1e7298ab41f3.png)\r\n\r\n#### STL/Config (.ZIP) where problem occurs\r\nhttp://www.thingiverse.com/thing:1363023\r\n[Slic3r_config_bundle_1.3.0-dev-2016-12-11.ini.zip](https://github.com/alexrj/Slic3r/files/644932/Slic3r_config_bundle_1.3.0-dev-2016-12-11.ini.zip)\r\nUse \"Single material, 60 mms, 0.2mm layers\" print profile.  I guess the filament profile and printer profile don't matter here (I was using \"Inland Yellow\", and there's only one printer profile)."},"comment":{"url":"https://api.github.com/repos/alexrj/Slic3r/issues/comments/266331977","html_url":"https://github.com/alexrj/Slic3r/issues/3612#issuecomment-266331977","issue_url":"https://api.github.com/repos/alexrj/Slic3r/issues/3612","id":266331977,"user":{"login":"lordofhyphens","id":31754,"avatar_url":"https://avatars.githubusercontent.com/u/31754?v=3","gravatar_id":"","url":"https://api.github.com/users/lordofhyphens","html_url":"https://github.com/lordofhyphens","followers_url":"https://api.github.com/users/lordofhyphens/followers","following_url":"https://api.github.com/users/lordofhyphens/following{/other_user}","gists_url":"https://api.github.com/users/lordofhyphens/gists{/gist_id}","starred_url":"https://api.github.com/users/lordofhyphens/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/lordofhyphens/subscriptions","organizations_url":"https://api.github.com/users/lordofhyphens/orgs","repos_url":"https://api.github.com/users/lordofhyphens/repos","events_url":"https://api.github.com/users/lordofhyphens/events{/privacy}","received_events_url":"https://api.github.com/users/lordofhyphens/received_events","type":"User","site_admin":false},"created_at":"2016-12-12T02:49:52Z","updated_at":"2016-12-12T02:49:52Z","body":"I thought part of the point of gap fill is that it's constrained between two perimeters and so you can usually get thinner areas filled in than you would normally be able."}}
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