{"action":"created","issue":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/7185","repository_url":"https://api.github.com/repos/MarlinFirmware/Marlin","labels_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/7185/labels{/name}","comments_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/7185/comments","events_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/7185/events","html_url":"https://github.com/MarlinFirmware/Marlin/issues/7185","id":239507594,"number":7185,"title":"Turn on extruder fan always (i am not using extruder)","user":{"login":"Kondenado","id":29779083,"avatar_url":"https://avatars3.githubusercontent.com/u/29779083?v=3","gravatar_id":"","url":"https://api.github.com/users/Kondenado","html_url":"https://github.com/Kondenado","followers_url":"https://api.github.com/users/Kondenado/followers","following_url":"https://api.github.com/users/Kondenado/following{/other_user}","gists_url":"https://api.github.com/users/Kondenado/gists{/gist_id}","starred_url":"https://api.github.com/users/Kondenado/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Kondenado/subscriptions","organizations_url":"https://api.github.com/users/Kondenado/orgs","repos_url":"https://api.github.com/users/Kondenado/repos","events_url":"https://api.github.com/users/Kondenado/events{/privacy}","received_events_url":"https://api.github.com/users/Kondenado/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":3,"created_at":"2017-06-29T14:55:14Z","updated_at":"2017-06-30T12:14:38Z","closed_at":null,"body":"Dear All\r\n\r\nLong history short, for very particular reasons (I am using the 3D printer as a robotic arm, more than a   printer, and I do not have neither the extruder, neither the thermocouple connected to the microcontroller) I need the extruder fan (D9) to be on always on. \r\n\r\nWhen I connect my laptop and I run the command M106 through the serial connection, the fan works well. But now I want the to start the fan without sending any command, I want it to start automatically.\r\n\r\nI have tried to make many things but any of them worked.\r\n\r\n- I have tried to set the \"auto_fan\" starting temperature to -300 (as long as i do not have the thermocouple connected, the temperature value is 0 (M105)). But, it doesn't work. \r\n\r\n- I have also tried to set the D9 output as a controller fan, but it doesn´t work either.\r\n\r\nSometimes some compiling errors appear (you can not set this as a controller fan ...\") but i have just disabled the error, as long as i am not using extruder  it should not be a problem.\r\n\r\nMy configuration\r\nPrinter: 3D maker\r\nController: Arduino Mega + Ramps 1.4 + Marlin\r\n\r\nThank you very much."},"comment":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/comments/312251733","html_url":"https://github.com/MarlinFirmware/Marlin/issues/7185#issuecomment-312251733","issue_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/7185","id":312251733,"user":{"login":"Kondenado","id":29779083,"avatar_url":"https://avatars3.githubusercontent.com/u/29779083?v=3","gravatar_id":"","url":"https://api.github.com/users/Kondenado","html_url":"https://github.com/Kondenado","followers_url":"https://api.github.com/users/Kondenado/followers","following_url":"https://api.github.com/users/Kondenado/following{/other_user}","gists_url":"https://api.github.com/users/Kondenado/gists{/gist_id}","starred_url":"https://api.github.com/users/Kondenado/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Kondenado/subscriptions","organizations_url":"https://api.github.com/users/Kondenado/orgs","repos_url":"https://api.github.com/users/Kondenado/repos","events_url":"https://api.github.com/users/Kondenado/events{/privacy}","received_events_url":"https://api.github.com/users/Kondenado/received_events","type":"User","site_admin":false},"created_at":"2017-06-30T12:14:38Z","updated_at":"2017-06-30T12:14:38Z","body":"Sorry, the fan requires 24 V,\r\n\r\nSecond, I am concerned about supplying to much current (i will supply 12V and 5A). While I guess that small fans don't require so much (It requires 0.8 W; so between 300-700 mA). I think this might be too much for the fan right? I am not the biggest electronic expert on the world. "}}
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