Jump to content

Nozzle hitting the print/ under extraction


mariem

Recommended Posts

Posted · Nozzle hitting the print/ under extraction

Hi guys! I've been getting some weird issue on my latest prints!

I printed 3 heartstone key before without any issue >>

Heartsone key airbrushed

I had to print couple of them for a tournement, unfortunatly I also start to print them a little late aaaand...

I started getting trouble with the print.

I had 3 prints in a row fail on me

I dont have the picture of them all but the first one unstick to the print bed,

I redid my calibration and it seems like it was better.

My second and third print both failed for the same reason,

It seems like something happens (not too sure why) wich makes that at some point my nozzle start hitting my print (like if my print was a layer too high or something)

then after a little while of the nozzle kind of stressing/hitting the print while printing, of course the print unstick from the bed and hop, huge tangly mess!

My third print seem like it was doing fine, went way higher than my two last attempt.

Then at a certain high I got a understruded later (allright?) but it continued and I though it would be okay,

a litle while after another unde-extruded layer.

Then it started slowly messing up and I was going to loose the print once again.

The head start hitting the print once again, I taped the print and the support together and tape the bottom of it to the print bed in the hope of saving the print.

Anyone had this issue before...?

20140828 151839

 

  • Link to post
    Share on other sites

    Posted · Nozzle hitting the print/ under extraction

    Hi Mariem, could you answer a couple of questions please.

    1. Extruder temp., print speed, layer depth, fan setting.

    2. The 2nd picture suggests you are printing 3 copies simultaneously, were the previous attempts printed with 3 copies also?

    3. Being curious, do you print the key element separately and then stick it to the shaft?

     

  • Link to post
    Share on other sites

    Posted · Nozzle hitting the print/ under extraction

    If you look carefully you can see sh prints the key with the part you normall hold down and the shaft pointing upwards. Plus she has a support column going all the way up to the top to support the locking portion of the key.

    First of all - you have "raised edges" which are common on overhangs. Just above the hexagon key grip you have two sections that come together at a steep overhang. Once these connect the printer slowly recovers but until thin you get raised edges that the printer can hit. Hard! The solution is to have the part stick to the glass. Hard!

    So I recommend you:

    1) clean your glass well. It probably has some oils from your fingers.

    2) Use PVA glue - the glue stick that comes with the UM2 is pretty good. You can smear that out with some water and paper towels maybe and let it try. Or what I do: mix normal Elmer's wood glue with 10 parts water. Shake it up in a jar and paint on the glass with a paint brush. Heat up the glass until it dries out and becomes invisible.

    3) Use brim (you did already of course).

    4) Fans at 100%. Fans are very important for overhangs. The more fan the better. Add extra fans. Also maybe lower your printing temp for these overhangs. What temp are you printing at? Maybe go down another 10C?

    5) You can push down on the lifting edges *while it prints* if you want. I use a putty knife. You have to be quick.

    Once the print gets to the shaft of the key I think you are safe.

     

  • Link to post
    Share on other sites

    • 2 weeks later...
    Posted · Nozzle hitting the print/ under extraction

    Sorry for the delay in my response, i've been super busy!

    Yellowshark, I was printing at 30mm/sec, 190C, 60microns, fan 100%

    I was printing one only and all in one piece

    gr5, thanks for the tip to make the print stick better.

    I always used the glue but never smear it out or anything, I just basically applied a thin layer straight up with the tupe.

    I think the fan are always a 100% by default right? when I click on ''tune'' on my printer it always says 100% but do I have to manually ajust it somewhere else?

    I was printing a 190C I'm not sure If I can go any lower?

    In my last two prints I started getting under extrusion like this

    20140829 002620

    I've never had issue like this before, and in my last two print, lines line that happens a couple time through the print.

    sometimes it almost looks like those lines are shifted. Like one layer a little bit too much on one side and then another one on the opposiite direction, then thing go back to normal ..

    How can I prevent this from happening, what is the cause?

     

  • 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! 
          • Like
        • 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.
          • Like
        • 0 replies
    ×
    ×
    • Create New...