Jump to content

UMO+ not moving extrusion motor, also problem with burnt plastic "boogers"


Lakster37

Recommended Posts

Posted · UMO+ not moving extrusion motor, also problem with burnt plastic "boogers"

I recently got and assembled the UMO+ and was able to get a few good prints out of it after some trial and error. However, I was also getting some burnt "boogers" of plastic all over my prints (I say burnt because the grey plastic was turning a brown color). At the time, I didn't mind too much because any that were left over were easy to break off the prints and they still looked good. However, a few days ago I did a print over night, and I think the print head got very clogged, I'm assuming because of running into all of those boogers as it was still printing, the result of which caused the plastic to stop moving through the print head, and the extruder to grind up the plastic filament because it wasn't able to push it through the bowden tube anymore. I've been in the process of cleaning out the print head, aluminum block, etc. (everything around the nozzle got nicely coated in melted plastic). If you have any suggestions for that, I'd be glad to hear them.

However, the biggest problem I've found is that since then, I'm not able to control the extruder motor anymore. It was working for a little while after the initial failed print, but now it just won't move the motor at all. Just as a quick troubleshoot, I tried plugging in the extruder motor to the y-motor plug on the motherboard and the extruder motor moved when I moved the "y-axis" in the Move Axis menu! However, the really bad news is that if I tried plugging in a different motor to the extruder plug (in this case, the y-motor) it wouldn't move that-motor either when I tried to move the extruder in the Move Axis menu... Does that mean that there's some problem with the electronics themselves? I've tried reflashing the firmware and that doesn't seem to have fixed it at all. If you've got any other suggestions to troubleshoot or to propose a fix, I'm more than happy to hear! Thanks.

  • Link to post
    Share on other sites

    Posted · UMO+ not moving extrusion motor, also problem with burnt plastic "boogers"

    Just a quick thought, have you tried swapping over the driver chip for a known working one (i.e the Y axis one) in your case it could well be that the chip overheated and its fried itself as alot of your symptoms are what lead me down the bath of lowering the power to my extruder in the first place, failing prints and blocked heads were common place before i did.

  • Link to post
    Share on other sites

    Posted · UMO+ not moving extrusion motor, also problem with burnt plastic "boogers"

    In order to swap out the driver chips I would not to desolder the existing one and resolder a new one on, correct? At the moment, I don't trust my soldering skills on the tiny legs of those chips...

  • Link to post
    Share on other sites

    Posted · UMO+ not moving extrusion motor, also problem with burnt plastic "boogers"

    You can just swap over the complete sub board, they just pull out , just make sure that you plug them in the correct way , because the extruder driver faces the opposite way to the other 3

  • Link to post
    Share on other sites

    Posted · UMO+ not moving extrusion motor, also problem with burnt plastic "boogers"

    Umo+ uses the same um2 board. You need to desolder to do that. I would contact support.ultimaker.com or the company that sold you the kit since that sounds weird and could just be a faulty board. Who knows maybe it's just a dead cable.

  • Link to post
    Share on other sites

    Posted (edited) · UMO+ not moving extrusion motor, also problem with burnt plastic "boogers"

    Also to do a full clean of the nozzle/block/etc. Boil them with a bit of salt and vinegar for as long as you need. Or use a airdryer to keep all hot while you clean them.

    To avoid filament leaks assemble as follow:

    Do everything as the manual but let the nozzle just a little tinny not totally (in) (just a tinny little gap). Then put the heat barrel insulator (the one with the peek). When all its tight (don't over do it just well fit) set the nozzle assembled and preheat to 200C. Then with the propper tools hold the aluminium block and tight the nozzle for good.

    The problem with how the manual assembly it's done it's that without a propper fit on 'heat' the thermal expansion of the metal will most likely leave a gap for the filament to leak.

     

    Edited by Guest
  • Link to post
    Share on other sites

    Posted · UMO+ not moving extrusion motor, also problem with burnt plastic "boogers"

    Thanks for your help, guys. Turns out I'm stupid and forgot that there's a safety feature that the extruder motor won't move unless you're heating the hot end (which makes sense), so I didn't actually have a problem with the extruder motor channel.

    I ended up cleaning my block/nozzle/heat pipe up using a soldering iron to heat them up and a wet paper towel and Q-tips to wipe away the plastic. It wasn't great, but I got most of it off. I also really appreciate the tip about tightening up everything in the hot end while it's hot, that definitely solved the leaky plastic issue, which (I think) was the original cause of the problem in the first place.

  • 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

      • Introducing Universal Cura Projects in the UltiMaker Cura 5.7 beta
        Strap in for the first Cura release of 2024! This 5.7 beta release brings new material profiles as well as cloud printing for Method series printers, and introduces a powerful new way of sharing print settings using printer-agnostic project files! Also, if you want to download the cute dinosaur card holder featured below, it was specially designed for this release and can be found on Thingiverse! 
        • 10 replies
      • 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.
        • 0 replies
    ×
    ×
    • Create New...