{"action":"created","issue":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/5011","repository_url":"https://api.github.com/repos/MarlinFirmware/Marlin","labels_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/5011/labels{/name}","comments_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/5011/comments","events_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/5011/events","html_url":"https://github.com/MarlinFirmware/Marlin/issues/5011","id":182572658,"number":5011,"title":"EXTRUDER_AUTO_FAN_SPEED help?","user":{"login":"gcormier","id":8388983,"avatar_url":"https://avatars.githubusercontent.com/u/8388983?v=3","gravatar_id":"","url":"https://api.github.com/users/gcormier","html_url":"https://github.com/gcormier","followers_url":"https://api.github.com/users/gcormier/followers","following_url":"https://api.github.com/users/gcormier/following{/other_user}","gists_url":"https://api.github.com/users/gcormier/gists{/gist_id}","starred_url":"https://api.github.com/users/gcormier/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gcormier/subscriptions","organizations_url":"https://api.github.com/users/gcormier/orgs","repos_url":"https://api.github.com/users/gcormier/repos","events_url":"https://api.github.com/users/gcormier/events{/privacy}","received_events_url":"https://api.github.com/users/gcormier/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/labels/Support:%20Configuration","name":"Support: Configuration","color":"006b75"}],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":27,"created_at":"2016-10-12T16:31:39Z","updated_at":"2016-10-25T18:18:28Z","closed_at":null,"body":"I'm trying to turn down my extruder fan speed, as I've upgraded it to something with better specs, so it does not need to run at full speed. (It will be quieter).\r\n\r\nAt a first glance, it look like EXTRUDER_AUTO_FAN_SPEED in Configuration_adv.h will get me there.\r\n\r\nMy config is RAMPS1.4. The hotend fan is connected to a RAMPS Fan Extender. (E3D Chimera, so 1 fan for 2 hotends). The Fan Extender is shifted 2 pins away from the top, which lets me still use 2 servo pins - one for heated bed (solid state relay), one for BLTouch.\r\n\r\n> #define HEATER_BED_PIN   11   // Servo pin 11 to drive the SSR\r\n> #define EXTRUDER_0_AUTO_FAN_PIN 5 // Servo pin 5 for E3D Fan\r\n> #define EXTRUDER_1_AUTO_FAN_PIN 5 // Servo pin 5 for E3D Fan\r\n\r\n\r\nWith EXTRUDER_AUTO_FAN_SPEED at 255, the fan comes on at 50 degrees as expected. There is a RED led inside my RAMPS case that lights up solid.\r\n\r\nWhen I change EXTRUDER_AUTO_FAN_SPEED to 245, the fan no longer comes on. The red led flickers for a split second - at what I assume is as the probe hits 50 degrees - but remains off.\r\n\r\nI've tried looking around for this quite a bit, both on the internet, and inside the code, but I can't seem to put it together."},"comment":{"url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/comments/256120057","html_url":"https://github.com/MarlinFirmware/Marlin/issues/5011#issuecomment-256120057","issue_url":"https://api.github.com/repos/MarlinFirmware/Marlin/issues/5011","id":256120057,"user":{"login":"brainscan","id":2219672,"avatar_url":"https://avatars.githubusercontent.com/u/2219672?v=3","gravatar_id":"","url":"https://api.github.com/users/brainscan","html_url":"https://github.com/brainscan","followers_url":"https://api.github.com/users/brainscan/followers","following_url":"https://api.github.com/users/brainscan/following{/other_user}","gists_url":"https://api.github.com/users/brainscan/gists{/gist_id}","starred_url":"https://api.github.com/users/brainscan/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/brainscan/subscriptions","organizations_url":"https://api.github.com/users/brainscan/orgs","repos_url":"https://api.github.com/users/brainscan/repos","events_url":"https://api.github.com/users/brainscan/events{/privacy}","received_events_url":"https://api.github.com/users/brainscan/received_events","type":"User","site_admin":false},"created_at":"2016-10-25T18:18:28Z","updated_at":"2016-10-25T18:18:28Z","body":"Have you tried auto tune with the fan running? If it's going to be running while printing then it needs to be on while you tune it. That's my experience anyway.\n\nGet Outlook for iOS<https://aka.ms/o0ukef>\n\n\n\n\nOn Sun, Oct 23, 2016 at 11:30 PM +0100, \"Doug Walmsley\" <notifications@github.com<mailto:notifications@github.com>> wrote:\n\n\nHello All,\nI recently built a Cartesian 3D printer utilizing a Azteeg 3 Pro board and a Diamond Hotend extruder. My current issue is with the extruder fan which is connected to D9.\n\nI originally pinned out on port 5 (pin 5) and when the autotemp feature in Configuration_adv.h activated the fan came on and the temperature stopped climbing to desired operator selected level. After trouble shooting, I discovered that as stated earlier in the blog, the PWM is either 255 or 0 and there was no speed adjusting possible.\n\nSo, I pinned the fan to D9 and found I had success with autofan on/off and I was able to input from PWM 40 to 255. But there is an issue I cannot figure out. The fan pushes air down and through the 3 extruder cooling vents but even at a PWM of 40 (which barely moves the fan) I still find the temperature won't reach desired operator level.\n\nI adjusted the speed and I tried modifying the Configuration_adv.h section for the extruder to 185 C and PWM of 40 and once the temp was reached the fan came on at desired speed. However, I commanded a higher temperature level and the built-in safety code triggers because the heating stops climbing.\n\nI was successful in AutoPID tuning the extruder up to 240C with no fan connected but don't advise this to anyone as the whole extruder unit was quite hot. I did this to establish a Kp Ki and Kd configuration for Configuration.h extruder heating section.\n\nOn a side note, I have a thermal blanket separator placed between the extruder head, thermistor, and heater for the cooling vents and fan assembly. This was recommended to ensure the fan wasn't defeating the heater and thermistors job.\n\nWhat am I doing wrong that I'm unable to get the fan to auto speed adjust during heat up of extruder or to get the extruder to reach desired temperatures?\n\n-\nYou are receiving this because you are subscribed to this thread.\nReply to this email directly, view it on GitHub<https://github.com/MarlinFirmware/Marlin/issues/5011#issuecomment-255619271>, or mute the thread<https://github.com/notifications/unsubscribe-auth/ACHemC3vG8SbBcbxMjoKWGu8Vml1FcFNks5q29_5gaJpZM4KU9L2>.\n"}}
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