{"action":"created","issue":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/10341","repository_url":"https://api.github.com/repos/MarlinFirmware/Marlin","labels_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/10341/labels{/name}","comments_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/10341/comments","events_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/10341/events","html_url":"https://github.com/MarlinFirmware/Marlin/issues/10341","id":312248133,"node_id":"MDU6SXNzdWUzMTIyNDgxMzM=","number":10341,"title":"Pauses in K factor test pattern - read ahead issue?","user":{"login":"Squid116","id":804121,"node_id":"MDQ6VXNlcjgwNDEyMQ==","avatar_url":"https://avatars2.githubusercontent.com/u/804121?v=4","gravatar_id":"","url":"https://api.github.com/users/Squid116","html_url":"https://github.com/Squid116","followers_url":"https://api.github.com/users/Squid116/followers","following_url":"https://api.github.com/users/Squid116/following{/other_user}","gists_url":"https://api.github.com/users/Squid116/gists{/gist_id}","starred_url":"https://api.github.com/users/Squid116/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Squid116/subscriptions","organizations_url":"https://api.github.com/users/Squid116/orgs","repos_url":"https://api.github.com/users/Squid116/repos","events_url":"https://api.github.com/users/Squid116/events{/privacy}","received_events_url":"https://api.github.com/users/Squid116/received_events","type":"User","site_admin":false},"labels":[{"id":92232148,"node_id":"MDU6TGFiZWw5MjIzMjE0OA==","url":"https://api.github.com/repos/MarlinFirmware/Marlin/labels/Needs:%20Work","name":"Needs: Work","color":"d93f0b","default":false}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":155,"created_at":"2018-04-07T22:18:30Z","updated_at":"2018-06-06T01:01:10Z","closed_at":null,"author_association":"NONE","body":"When I am printing the k-factor test pattern, the hotend slows right down/comes to a complete stop after the initial slow segment - I would have expected the planner to have detected the change of speed is moving in the same direction and not slowed down/or stopped towards the end of the slow segment? Because of this I am seeing blobs at the start of the fast segment even with K=0.\r\n\r\nI don't think I have configured anything that would have messed with the read-ahead like this, but I'm\r\n not 100% sure,and I don't know where to look.\r\n\r\nHappens both from USB and SD card.\r\n\r\nhere is my config:\r\nhttps://github.com/Squid116/Marlin/blob/bugfix-1.1.x/Marlin/Configuration.h\r\n\r\nand config_adv:\r\nhttps://github.com/Squid116/Marlin/blob/bugfix-1.1.x/Marlin/Configuration_adv.h\r\n\r\n\r\n[kfactor (16).gcode.txt](https://github.com/MarlinFirmware/Marlin/files/1886768/kfactor.16.gcode.txt)\r\n\r\n(Edit: updated links to correct branch in my github repo)\r\n"},"comment":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/comments/394906844","html_url":"https://github.com/MarlinFirmware/Marlin/issues/10341#issuecomment-394906844","issue_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/10341","id":394906844,"node_id":"MDEyOklzc3VlQ29tbWVudDM5NDkwNjg0NA==","user":{"login":"Squid116","id":804121,"node_id":"MDQ6VXNlcjgwNDEyMQ==","avatar_url":"https://avatars2.githubusercontent.com/u/804121?v=4","gravatar_id":"","url":"https://api.github.com/users/Squid116","html_url":"https://github.com/Squid116","followers_url":"https://api.github.com/users/Squid116/followers","following_url":"https://api.github.com/users/Squid116/following{/other_user}","gists_url":"https://api.github.com/users/Squid116/gists{/gist_id}","starred_url":"https://api.github.com/users/Squid116/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Squid116/subscriptions","organizations_url":"https://api.github.com/users/Squid116/orgs","repos_url":"https://api.github.com/users/Squid116/repos","events_url":"https://api.github.com/users/Squid116/events{/privacy}","received_events_url":"https://api.github.com/users/Squid116/received_events","type":"User","site_admin":false},"created_at":"2018-06-06T01:01:10Z","updated_at":"2018-06-06T01:01:10Z","author_association":"NONE","body":"The slowdown at the junction will occur without junction enabled - the jerk calculation is wrong.  Maybe it hasn't been noticeable previously, but it was there."}}
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