Jump to content

Fan settings in Cura for UM2


Recommended Posts

Posted · Fan settings in Cura for UM2

I recently forgot to turn off the fan for an ABS print.  As the print progressed, the fan increased speed as the file instructed it to.  When I turned the fan speed to 0, it returned to the programmed speed after a few seconds.  The only way I could keep it off was to keep the fan speed screen active and set to 0.  What am I missing?  Other settings like print speed or flow % don't get rewritten after I change them.  It has been a while since I updated the firmware on my printer.  Is that it?



  • Link to post
    Share on other sites

    Posted · Fan settings in Cura for UM2

    That's a normal behavior. Fan speed is an absolute value, it will be set opnew every time the gcode contains a M106 command (the last one wins...)

    The fact that the value from the file is overridden as long as the menu is open... well that's probably just an accidental side effect.


    Print speed (on the printer) is an (additional) percentage setting, this behaves different and just multiplies all speed settings from the gcode file with the chosen factor.


  • Link to post
    Share on other sites

    Posted · Fan settings in Cura for UM2

    I experimented with the fan speed again last night and am now more confused.


    Sure enough, when I set the speed to 75% when the program wanted 20% after a few seconds it went back to 20%. 


    Now my question is, if the speed a user selects on the UM2 controller is constantly getting overwritten by the gcode, why is fan speed even an option.  Kind of gives the operator the false idea that he/she has control over something they really don't.

  • Link to post
    Share on other sites

    • 3 months later...
    Posted · Fan settings in Cura for UM2

    Jumping in on this post slightly but also experiencing a similar issue to above and after a bit of help - I'm struggling to understand how the various fan/cooling settings are linked and which takes priority. So...

    • Under material profiles, printer settings you can set fan speed to a % value.
    • Main side bar, under Cooling - You can enable fan cooling and fan speed again, which is also a % value.
    • ChangeatZ plugin, fan speed is labelled as a PWM value (0-255).

    I'm trying to print with ASA filament but I'm struggling with it atm so if I try a test print, changing the temp and fan speeds, how should I have Cura set up?


    Material Profiles - 10%.

    Cooling enabled and fan speed matches profile so 10% Max (2% Reg).


    However, with these settings the fans don't spin - Is there a minimum % I need to enter?


    Then if I do use the ChangeatZ plugin, how will the values I enter here effect the % settings?


    Running tinker on a 2+.


    Many thanks,

  • Link to post
    Share on other sites

    Posted · Fan settings in Cura for UM2

    On my UM2 the fans require a set point of 25-30% just to begin rotating.  Once they start to spin, they will stay spinning down to about 10%.  I think it is a limitation of the physics of the motors, etc.  I figured this value out by controlling the % on the printer during a print.

  • Link to post
    Share on other sites

    Create an account or sign in to comment

    You need to be a member in order to leave a comment

    Create an account

    Sign up for a new account in our community. It's easy!

    Register a new account

    Sign in

    Already have an account? Sign in here.

    Sign In Now
    • Our picks

      • S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
        (Sorry, was out of office when this released)

        This update is for...
        All UltiMaker S series  
        New features
        Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
          • Like
        • 0 replies
      • Ultimaker Cura 5.6 stable released
        Cura now supports Method series printers!
        A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
        • 48 replies
    • Create New...