Jump to content
Ultimaker Community of 3D Printing Experts

UM3 extruder messed itself. ABS all over. How to clean-up?


cotton9
 Share

Recommended Posts

Posted · UM3 extruder messed itself. ABS all over. How to clean-up?

I apologize if this has been discussed in the forum before, but as you can tell from my title, I'm not sure how to describe it to look it up. I've only been printing for a couple months, but haven't had too many issues to deal with until today.

I starting a 6 hour print of an open-top cylinder (abt 20cm diameter) last night, black ABS (not Ultimaker), default Cura settings for "Generic ABS" (w/ glue stick). The first layer printed fine, so I went to bed. When I checked it this morning, the UM3 said the build was completed, but nothing was on the plate, and the material was an unrecognizable glob stuck all over the head - inside and outside. It's stuck, and it's a mess.

IMG_20161214_165913.thumb.jpg.4197a97d6f8ae3f9a24d5968ea03ed75.jpg IMG_20161214_170217.thumb.jpg.ae8a3565161f69d646c6d0b61974d466.jpgIMG_20161214_165919.thumb.jpg.5100c8740761139b1f3a349cdfa8acfb.jpg

Is this common and does it have a name? Any ideas how it happened, how to prevent it, and how to clean it up? My initial thought is that there was adhesion issues because the default plate temp wasn't quite high enough for most ABS. I've tried heating the extruder to dislodge it, which loosened it a bit, but then I got a max temp error (probably b/c the fan can't hit the extruder). Unless I hear otherwise, my next step is to try and clean it up using a desoldering heat gun.

Any insight would be appreciated.

IMG_20161214_165913.thumb.jpg.4197a97d6f8ae3f9a24d5968ea03ed75.jpg

IMG_20161214_170217.thumb.jpg.ae8a3565161f69d646c6d0b61974d466.jpg

IMG_20161214_165919.thumb.jpg.5100c8740761139b1f3a349cdfa8acfb.jpg

  • Link to post
    Share on other sites

    Posted · UM3 extruder messed itself. ABS all over. How to clean-up?

    Do you have a heat gun? You need to get that mess up to about 110C. A bit hotter than boiling water. If you don't have one yet, buy a heat gun asap. A hair dryer might work actually - not sure.

    Don't do unattended prints until you are an expert at getting parts to stick. Here's a (long but informative) video:

     

  • Link to post
    Share on other sites

    Posted · UM3 extruder messed itself. ABS all over. How to clean-up?

    Thanks for the reply,

    I grabbed my heat gun, then put it down to double-check in the forum. Glad to have the method confirmed.

    I haven't had any issues with sticking until this print. But I admit that I've relied heavily on the temps listed on the filament packaging and Cura plate defaults. This was my first time with this particular ABS, and I've since read that the default ABS plate temp is adequate for Ultimaker brand, but not hot enough for others. I'll try again w/ higher temps (and anything else that video says that I'm not already doing).

    Thanks!

  • Link to post
    Share on other sites

    Posted · UM3 extruder messed itself. ABS all over. How to clean-up?

    For the record, in case someone finds themselves in a similar situation:

    Cleaning this up was NOT EASY.

    I ended up using a precision heat gun that's part of a desolering kit, using 250-300 C temps, with a variety of tweezers and pliers.

    1) Unstuck the fan casing from the blob - This wasn't difficult w/ heat.

    2) Dropped the fan casing out of the way and dislodged the blob - This was much more difficult than anticipated b/c two of the hotend wires were disconnected and embedded inside the blob. I had to slowly pick away the heated ABS to get to the deeper unheated ABS and eventually dislodge the wires.

    3) Removed the ABS that squished itself on top of the heater block from the head - I couldn't slide out the extruder b/c ABS was sitting on top of the heater block, which prevented it from lifting. After about 20 minutes heating/picking this small section to remove the ABS, the hotend eventually fell off. As you can tell from the photo, the ABS had gone so far inside that there was no way I was going to be able to remove it all from above the heater block while still attached.

    Can anyone tell what parts of this are salvageable vs. useless? Any tricks to clean up the last bit? Heat/picking/acetone?

    5a33251ea320e_media-20161215(1).thumb.jpg.775ca370f4b93f7c2eb79c899b53fe66.jpgmedia-20161215.thumb.jpg.4dcbdfcb31b28353cfe7b729b293aff0.jpg

  • Link to post
    Share on other sites

    Posted · UM3 extruder messed itself. ABS all over. How to clean-up?

    Indeed, your only option is to get a new core, but I would not trow the parts away. In time there may be 3th party alternatives or refurbish kits for which you can still use them. I don't know of any such initiatives now, but it just seems logical that someone will pursue this....

  • Link to post
    Share on other sites

    Posted · UM3 extruder messed itself. ABS all over. How to clean-up?

    Get a new core. BUT DON'T THROW THIS ONE AWAY. You will be able to purchase just the broken parts some day. Do soak it in acetone overnight though to get the rest of the abs out of there.

  • Link to post
    Share on other sites

    Posted · UM3 extruder messed itself. ABS all over. How to clean-up?

    Will do - Thanks for the info!

  • 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
     Share

    • Our picks

      • Ultimaker showcase | April 2022 | 4pm CEST | 10am EDT
        I'm excited because I've personally produced this showcase event, so if you are curious what else I'm up to nowadays, come check it out and say hi in the chat! It would mean a lot! 
        • 4 replies
      • New here? Get ahead with a free onboarding course
        Hi,
         
        Often getting started is the most difficult part of any process. A good start sets you up for success and saves you time and energy that could be spent elsewhere. That is why we have a onboarding course ready for
        Ultimaker S5 Pro Bundle, Ultimaker S5, Ultimaker S3 Ultimaker 2+ Connect.   
        They're ready for you on the Ultimaker Academy platform. All you need to do to gain access is to register your product to gain free access. 
        Ready? Register your product here in just 60 seconds.
        • 11 replies
    ×
    ×
    • Create New...