{"action":"created","issue":{"url":"https://api.github.com/repos/alexrj/Slic3r/issues/2599","labels_url":"https://api.github.com/repos/alexrj/Slic3r/issues/2599/labels{/name}","comments_url":"https://api.github.com/repos/alexrj/Slic3r/issues/2599/comments","events_url":"https://api.github.com/repos/alexrj/Slic3r/issues/2599/events","html_url":"https://github.com/alexrj/Slic3r/issues/2599","id":55972876,"number":2599,"title":"Infill extrusion width getting way too wide when printing thin Layers","user":{"login":"simonkuehling","id":296454,"avatar_url":"https://avatars.githubusercontent.com/u/296454?v=3","gravatar_id":"","url":"https://api.github.com/users/simonkuehling","html_url":"https://github.com/simonkuehling","followers_url":"https://api.github.com/users/simonkuehling/followers","following_url":"https://api.github.com/users/simonkuehling/following{/other_user}","gists_url":"https://api.github.com/users/simonkuehling/gists{/gist_id}","starred_url":"https://api.github.com/users/simonkuehling/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/simonkuehling/subscriptions","organizations_url":"https://api.github.com/users/simonkuehling/orgs","repos_url":"https://api.github.com/users/simonkuehling/repos","events_url":"https://api.github.com/users/simonkuehling/events{/privacy}","received_events_url":"https://api.github.com/users/simonkuehling/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":27,"created_at":"2015-01-29T23:24:15Z","updated_at":"2015-12-11T09:27:57Z","closed_at":null,"body":"I'd like to open a discussion about the maximum extrusion width used for a specific nozzle diameter.\r\n\r\nMy reference setup:\r\n- Nozzle diameter 0.35mm\r\n- Extrusion widths all in \"auto\" mode (=0)\r\n\r\nWith these settings, for **0.1mm layers** i get an **infill extrusion width of 0.98mm, which is 2.8x the nozzle diameter**:\r\n\r\n```\r\n; generated by Slic3r 1.2.6-dev on 2015-01-29 at 23:39:38\r\n\r\n; external perimeters extrusion width = 0.35mm\r\n; perimeters extrusion width = 0.59mm\r\n; infill extrusion width = 0.98mm                         <-----------------------------\r\n; solid infill extrusion width = 0.59mm\r\n; top infill extrusion width = 0.59mm\r\n; support material extrusion width = 0.35mm\r\n```\r\n\r\nFor **0.05mm layers** i get an **infill extrusion width of 1.93mm, which is 5.5x the nozzle diameter**:\r\n\r\n```\r\n; generated by Slic3r 1.2.6-dev on 2015-01-30 at 00:10:27\r\n\r\n; external perimeters extrusion width = 0.35mm\r\n; perimeters extrusion width = 0.59mm\r\n; infill extrusion width = 1.93mm                         <-----------------------------\r\n; solid infill extrusion width = 0.59mm\r\n; top infill extrusion width = 0.59mm\r\n; support material extrusion width = 0.35mm\r\n```\r\n\r\nI think there should be some (static?) limit for the maximum extrusion width a nozzle can safely handle in the automatic calculation. This may depend on the shape of the nozzle tip of course - meaning that a bigger diameter of the flat face on the tip could possibly print wider lines than others, but i think we can find a safe value that fits most hardware designs.\r\nSomething like 1.5-1.6x the nozzle diameter would be my suggestion (which still may be manually overwritten in the Print Settings) - but i'd really like to hear other's opinions on this as well!\r\n\r\nEdit:\r\nThe full config files for reference\r\n[config.ini for 0.1mm layers](https://www.dropbox.com/s/jcw20k4y61k5rgg/config-point1.ini?dl=1)\r\n[config.ini for 0.05mm layers](https://www.dropbox.com/s/2073d9o8itk7c0s/config-point05.ini?dl=1)"},"comment":{"url":"https://api.github.com/repos/alexrj/Slic3r/issues/comments/163884963","html_url":"https://github.com/alexrj/Slic3r/issues/2599#issuecomment-163884963","issue_url":"https://api.github.com/repos/alexrj/Slic3r/issues/2599","id":163884963,"user":{"login":"bubnikv","id":5830947,"avatar_url":"https://avatars.githubusercontent.com/u/5830947?v=3","gravatar_id":"","url":"https://api.github.com/users/bubnikv","html_url":"https://github.com/bubnikv","followers_url":"https://api.github.com/users/bubnikv/followers","following_url":"https://api.github.com/users/bubnikv/following{/other_user}","gists_url":"https://api.github.com/users/bubnikv/gists{/gist_id}","starred_url":"https://api.github.com/users/bubnikv/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/bubnikv/subscriptions","organizations_url":"https://api.github.com/users/bubnikv/orgs","repos_url":"https://api.github.com/users/bubnikv/repos","events_url":"https://api.github.com/users/bubnikv/events{/privacy}","received_events_url":"https://api.github.com/users/bubnikv/received_events","type":"User","site_admin":false},"created_at":"2015-12-11T09:27:57Z","updated_at":"2015-12-11T09:27:57Z","body":"Hello Alessandro.\r\n\r\nFirst, you are my hero. Doing such a great programming job for free, having an architecture degree is quite an achievement!\r\n\r\nI seem to have similar issues with over extrusion using Slic3r 1.2.9. When printing membrane structures like the wonderful throw plane,\r\nhttp://www.thingiverse.com/thing:1115840\r\n\r\nSlic3r extrudes too much material and I am getting excessive pressure at the 1st and 2nd layer. The 2nd layer is the last on the wings and the print looks ugly and the excessive pressure causes curling of the material away from the bed. G-code generated by Cura prints much better for this model.\r\n\r\nI may set the extrusion width manually, but I understand that fixing the extrusion rate effectively disables the automatic, so some gaps may then be created in the print, which are too narrow for an infill and too wide for a regular extrusion. The way Cura handles the gaps is a zig-zag infill. The zig-zag infill strains the machine and it often ruins the print on overhangs, which is deadly when printing ABS with cooling off. Your heavy over-extrusion tactic works wonderfully for PLA prints for me. PLA fuses with the already lain threads very well and the newly added PLA flows into the gaps easily. With ABS, I am having issues with the nozzle scratching and digging into the uneven lower layer. Some over-extrusion will likely be helpful to make the print stronger, to accelerate the print and to prevent the gaps or the need for the zig-zag infill, but the over-extrusion needs to be limited.\r\n\r\nI would wish for another column in the manual extrusion width configuration page. How about having a \"maximum\" field for each extrusion width? So the automatic extrusion width would still work, but it would heed the maximum value?\r\n\r\nThanks, \r\nVojtech"}}