Jump to content

UM2 Printhead Fan Problem


neptuna

Recommended Posts

Posted (edited) · UM2 Printhead Fan Problem

Hi friends,

 

I searched the forum and the net but could not find a solution. My fan works normal. When I start printing everything goes right, fan working well. But after awhile fan stops and because of that the filament not getting cooled and when the extruder push the filament it gets thicker in the nozzle and can not get out properly, so less and less filament getting thru the nozzle. After awhile it stops completely and printer just continue to work w/o filament. When the printer finishes and starts to cool down the fan starts to work again after some temperature I guess.

 

Is there a temperature settings to tell the fan to work or is there any other problem? Thanks.

Edited by neptuna
  • Link to post
    Share on other sites

    Posted · UM2 Printhead Fan Problem
    2 minutes ago, neptuna said:

    Is there a temperature settings to tell the fan to work or is there any other problem? Thanks.

    There is and that could be the problem but unlikely.  It's the same sensor that knows the temp of the nozzle but a different circuit.

     

    More likely it's a bad wire in or just above the print head.  Heat the nozzle to 80C so it starts spinning the fan.  Then slide up the black mesh that covers the wiring above the print head and touch/push/play with the cabling.  I believe the wiring is a black and red wire - at least on the fan end of the connector.  Play with things to see if you can get the fan to fail.

     

    Maybe also take the head apart (just those 4 long screws).  Don't burn your fingers on the heater block.

     

    • Like 1
    Link to post
    Share on other sites

    Posted · UM2 Printhead Fan Problem
    12 hours ago, gr5 said:

    There is and that could be the problem but unlikely.  It's the same sensor that knows the temp of the nozzle but a different circuit.

     

    More likely it's a bad wire in or just above the print head.  Heat the nozzle to 80C so it starts spinning the fan.  Then slide up the black mesh that covers the wiring above the print head and touch/push/play with the cabling.  I believe the wiring is a black and red wire - at least on the fan end of the connector.  Play with things to see if you can get the fan to fail.

     

    Maybe also take the head apart (just those 4 long screws).  Don't burn your fingers on the heater block.

     

     

    Thank you very much for the reply. I will check the cables, there is not much to do otherwise I guess.

  • Link to post
    Share on other sites

    Posted · UM2 Printhead Fan Problem

    I and other's have had this exact problem and for all of us that I know of, it was in the cabling just above or inside the print head.  So you may be able to debug this just by poking the cabling.  Literally, poking it with your fingers.

     

    If you have a friend with a multimeter and who knows electronics, this is a very easy thing to debug and repair.  Otherwise it's a big undertaking (ordering and replacing parts one at a time).

    • Thanks 1
    Link to post
    Share on other sites

    Posted · UM2 Printhead Fan Problem

    I think I figured it out, the temp. sensor's connector causing the problem. I checked the sensor with a multimeter, the connections and the resistance is OK but the socket it is connecting to motherboard was not that good. I changed it. Now it is working as it should be. 

    Thank you again for your time :)

    • Like 1
    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...