Jump to content
UltiMaker Community of 3D Printing Experts

URGENT - In the middle of a print and need some advice


Recommended Posts

Posted · URGENT - In the middle of a print and need some advice

I'm in the middle of a 30 hours print and have just noticed some kinks in a brand new roll of filament (see picture).

The first "kink" is due to enter the bowden tube in about two hours. I can see the problem coming (i.e. the filament will get stuck and the whole print will be wrecked), but I'm not sure what to do to avoid it.

Any suggestion?

Also, does anyone know if I can pause a print, change the filament and resume (and if so, how to do it)?

2014 03 31 19.44.34

Thanks!

Phil

 

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    I would shave that down with a razor blade.

    UM1 can pause print. I'm not sure if UM2 can but I've been able to continue a long print after it failed. It's tricky - let me know if you want all the details - I have an explanation written up somewhere...

    So in summary - if you have a UM2, try to stop it in a recognizable spot - memorize where the print head is, and then just cut power and quickly push print head off to the side before it leaves a big blob on your print. Then you can take your time (maybe hours?) and continue the print at your leisure. However you should keep the bed hot the whole time. If the bed cools to much your print might just pop off.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    I've fed in new filament after an old one has ran out on the fly several times. All I did was firmly press the new filament against the old one as it entered into the feeder. It's a bit boring since you have to sit there and baby it for a few minutes but it's doable (small price to pay on a 30 hour print). So in your case I'd just cut the filament, remove the blob and then do what I described above.

    edit: I should mention this was on the UM1, I haven't tried it yet on the UM2.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    @gr5 @IRobertI - Thank you so much for the quick reply. You guys are great!

    I don't know if using a razor blade will work as the filament seems to be internally broken. I think that I'll cut off the filament before the kink and "spoon feed" clean filament using IRobertI's technique.

    Thanks also for the instructions re a failed print. Hopefully, I won't need them but it's good to have a plan B if all else fails.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    I've fed in new filament after an old one has ran out on the fly several times. All I did was firmly press the new filament against the old one as it entered into the feeder. It's a bit boring since you have to sit there and baby it for a few minutes but it's doable (small price to pay on a 30 hour print). So in your case I'd just cut the filament, remove the blob and then do what I described above.

    edit: I should mention this was on the UM1, I haven't tried it yet on the UM2.

     

    True.. but if you do this retraction doesn't work anymore because what happens at the feeder mechanism doesn't affect the seperated piece of filament.

    What I have already done a couple of times is:

    Prepare a new reel of filament. (straighten the tip)

    Very quickly open the feeder upgrade, pull out the filament

    Grab the new reel of filament, feed it up in the tube

    Close the feeder upgrade

    Swap the reels on the reel holder.

    While I was typing the above, I realized you had an Ultimaker 2.

    Because you can not manually open the feeder, I would recommend to use a little knife or whatever to shave it down a bit. It would even be better to make it too thin. You would hardly notice if it is only that spot.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    Thanks Sander. I'll try that first.

    I gather that it's not possible to pause a print on the UM2?

    Cheers

    Phil

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    True.. but if you do this retraction doesn't work anymore because what happens at the feeder mechanism doesn't affect the seperated piece of filament.

     

    Very good point, I guess it didn't affect the prints I did this on so it never crossed my mind. Oops!

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    PAUSE. would be nice :)

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    I believe I'm using the latest stable UM2 firmware and pause (in the Tune menu) works just fine for me. I used it a few times today while printing some ABS -- there were some steep overhangs that left some very ugly areas curling up sharply, and I just paused after that layer, carefully trimmed the curled areas down with a scalpel, and resumed the print.

    I recall that Pause At Z wasn't working on the UM2 before (something about the relevant G-code not being properly implemented on the UM2). Anybody know if that works now? Manual pause is very handy though, still.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    I think dgsharp is correct. Pause as a gcode doesn't work on UM2 for sure, but I guess the pause function while printing may work just fine.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    Thank you all for your help. By way of an update, I followed gr5 and Sander's suggestion to trim the kink with a razor blade and it has worked so far. The printing is still ongoing and I'm hoping that it will be finished by the time I come home from work tonight...

    Are these kind of kinks to be expected, or is this a defect that I should mention to UM?

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    Are these kind of kinks to be expected, or is this a defect that I should mention to UM?

     

    I've never seen one of these before. Ever. It doesn't look like a kink, it looks like the filament is wider at that spot.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    ..Is it ours?

    What color is it? You should fix your WB ;)

    But no, that is not very common no.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    @Sander - It's one of yours, I'm afraid (9029 PLA Pearl-White).

    Came home yesterday to find that the print had failed after about 24 hours. Another kink was hidden in the roll and got stuck in the feeder system :(

    I'll try gr5's method of recovering from a failed print over the week-end. Unfortunately, the print is for some architects and it needs to be pretty much perfect... Let's see what happens.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    @gr5

     

    It doesn't look like a kink, it looks like the filament is wider at that spot.

     

    I think that you are probably correct. The defect basically consists of a wider segment (c. 1mm in length) followed by a narrower section (also c. 1mm).

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    If your bed was heated during the print - try to keep the bed heated until you continue the print. If it's off right now, turn it back on - you don't want the part to pop off the bed. It's okay to leave the bed warm for many days until you figure this out.

    Once the part pops off the bed you probably need to start at the begining.

    If you want parts to look perfect, you can fill holes with bondo (auto body filler) and you can sand and then paint with automobile primer paint. After priming you can use any kind of paint you want. This will give you absolutely amazing quality and can hide holes, bumps, and other imperfections (but it can be a ton of work).

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    The reason parts pop off the bed is because the expansion coefficient for glass is different for plastic so they shrink by different amounts. Don't even touch your part gently until the bed is back up to temp.

     

  • Link to post
    Share on other sites

    Posted · URGENT - In the middle of a print and need some advice

    @gr5 - Thanks again for your comments and all your help. It's really nice to have somebody that's so knowledgeable to help! Unfortunately, it was too late when I saw your message and I had already switched off the printer (and therefore the heated bed). When I came home, the print had popped off on its own. :roll:

    I'll relaunch a new print tonight, cross my fingers and see what happens. At least, I'm learning...

     

  • 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

      • Here it is. The new UltiMaker S7
        The UltiMaker S7 is built on the success of the UltiMaker S5 and its design decisions were heavily based on feedback from customers.
         
         
        So what’s new?
        The obvious change is the S7’s height. It now includes an integrated Air Manager. This filters the exhaust air of every print and also improves build temperature stability. To further enclose the build chamber the S7 only has one magnetically latched door.
         
        The build stack has also been completely redesigned. A PEI-coated flexible steel build plate makes a big difference to productivity. Not only do you not need tools to pop a printed part off. But we also don’t recommend using or adhesion structures for UltiMaker materials (except PC, because...it’s PC). Along with that, 4 pins and 25 magnets make it easy to replace the flex plate perfectly – even with one hand.
         
        The re-engineered print head has an inductive sensor which reduces noise when probing the build plate. This effectively makes it much harder to not achieve a perfect first layer, improving overall print success. We also reversed the front fan direction (fewer plastic hairs, less maintenance), made the print core door magnets stronger, and add a sensor that helps avoid flooding.
         

         
        The UltiMaker S7 also includes quality of life improvements:
        Reliable bed tilt compensation (no more thumbscrews) 2.4 and 5 GHz Wi-Fi A 1080p camera (mounted higher for a better view) Compatibility with 280+ Marketplace materials Compatibility with S5 project files (no reslicing needed) And a whole lot more  
        Curious to see the S7 in action?
        We’re hosting a free tech demo on February 7.
        It will be live and you can ask any questions to our CTO, Miguel Calvo.
        Register here for the Webinar
          • Like
        • 10 replies
      • UltiMaker Cura 5.3.0-Alpha 🎄 Tree Support Spotlight 🎄
        Are you a fan of tree support, but dislike the removal process and the amount of filament it uses? Then we would like to invite you to try this special release of UltiMaker Cura. Brought to you by our special community contributor @thomasrahm
         
        We generated a special version of Cura 5.2 called 5.3.0 Alpha + Xmas. The only changes we introduced compared to UltiMaker Cura 5.2.1 are those which are needed for the new supports. So keep in mind, this is not a sneak peek for Cura 5.3 (there are some really cool new features coming up) but a spotlight release highlighting this new version of tree supports.  
          • Like
        • 17 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.
          • Like
        • 14 replies
    ×
    ×
    • Create New...