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Part cooling fan not turning ON with Cura 4.0?

Anyone else have this issue?

Fan seem to work fine with S3D...


  • Samuel PinchesSamuel Pinches Administrator Posts: 1,536
    Have you compared the gcode from both? Have a search for M106 (fan on) and M107 (fan off) and see what you find in each file.
  • chilman408chilman408 Member Posts: 12
    Yes, M106 is in both gcodes...only difference is S3D starts with M106 S255 then turns it down...

    Let me do some digging
  • Samuel PinchesSamuel Pinches Administrator Posts: 1,536
    Fans often need a blip at 100% before they will start spinning. If you’re trying to run at 20% speed or similar that is likely to be the problem.
  • Samuel PinchesSamuel Pinches Administrator Posts: 1,536
    Which firmware are you using?
  • chilman408chilman408 Member Posts: 12
    I haven't upgraded the firmware so original...

    Is there a way to blip the fan at 100% in Cura?

    I tried adding to the starting gcode, doesnt work
  • Samuel PinchesSamuel Pinches Administrator Posts: 1,536
    edited March 25
    Probably is, but not that I know of. There is a feature in the firmware to do a blip automatically but I can’t remember if we enabled it.
    Post edited by Samuel Pinches on
  • chilman408chilman408 Member Posts: 12
    So I ended up enabling M106 S255 at the start script and then define the minimum fan speed as 30% in Cura settings.  Looks to be working fine.
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