{"action":"created","issue":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/853","labels_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/853/labels{/name}","comments_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/853/comments","events_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/853/events","html_url":"https://github.com/MarlinFirmware/Marlin/issues/853","id":30002383,"number":853,"title":"Odd single thickness wall bug","user":{"login":"mattsch","id":134440,"avatar_url":"https://avatars.githubusercontent.com/u/134440?v=3","gravatar_id":"","url":"https://api.github.com/users/mattsch","html_url":"https://github.com/mattsch","followers_url":"https://api.github.com/users/mattsch/followers","following_url":"https://api.github.com/users/mattsch/following{/other_user}","gists_url":"https://api.github.com/users/mattsch/gists{/gist_id}","starred_url":"https://api.github.com/users/mattsch/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/mattsch/subscriptions","organizations_url":"https://api.github.com/users/mattsch/orgs","repos_url":"https://api.github.com/users/mattsch/repos","events_url":"https://api.github.com/users/mattsch/events{/privacy}","received_events_url":"https://api.github.com/users/mattsch/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/labels/Needs+update","name":"Needs update","color":"207de5"}],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":73,"created_at":"2014-03-24T00:15:56Z","updated_at":"2015-01-09T20:06:30Z","closed_at":"2014-04-13T20:15:58Z","body":"I had submitted this issue over to Slic3r first ([#1873](https://github.com/alexrj/Slic3r/issues/1837)),  moved here after their review.\r\n\r\nWhen trying to print the standard 20mm calibration cube to calculate extrusion multiplier with the extrusion width set to .40mm, I get a very interesting leaning tower (picture attached).  If I let Slic3r do it's own calculation, bump the width up manually to .48mm, or rotate the cube 45 degrees before slicing then it prints perfectly.\r\n\r\nI went through and checked all my mechanics, haven't had any other issues manifest that would indicate faulty parts.  I'm running the latest from the Marlin_v1 branch and my repo with configs is [here](https://github.com/mattsch/Marlin/tree/mendel90_lcd).\r\n\r\n![img_20140317_110330](https://f.cloud.github.com/assets/134440/2495123/95177e40-b2e8-11e3-83a1-c6db8da6e0d2.jpg)\r\n\r\nSTL, gcode, etc:\r\nhttp://www.excentral.org/files/slic3r_thing_wall_bug.tar.gz"},"comment":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/comments/69390929","html_url":"https://github.com/MarlinFirmware/Marlin/issues/853#issuecomment-69390929","issue_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/853","id":69390929,"user":{"login":"barneycg","id":2004769,"avatar_url":"https://avatars.githubusercontent.com/u/2004769?v=3","gravatar_id":"","url":"https://api.github.com/users/barneycg","html_url":"https://github.com/barneycg","followers_url":"https://api.github.com/users/barneycg/followers","following_url":"https://api.github.com/users/barneycg/following{/other_user}","gists_url":"https://api.github.com/users/barneycg/gists{/gist_id}","starred_url":"https://api.github.com/users/barneycg/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/barneycg/subscriptions","organizations_url":"https://api.github.com/users/barneycg/orgs","repos_url":"https://api.github.com/users/barneycg/repos","events_url":"https://api.github.com/users/barneycg/events{/privacy}","received_events_url":"https://api.github.com/users/barneycg/received_events","type":"User","site_admin":false},"created_at":"2015-01-09T20:06:30Z","updated_at":"2015-01-09T20:06:30Z","body":"By that you mean disable FW Retract in the firmware and clear the checkbox in slic3r ?"}}