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spooner777

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Posts posted by spooner777

    Suddenly Underextrusion

    in UltiMaker 3D printers

    Posted

    I opened the extruder and there are no shavings at all. Everything is clean, the filament is round and the delrin wheel too. I think it has to have something to do with the g-code. I am testing different settings now.

    I noticed that on Cura, the colour of the wall changes from red to yellow at the height where the problems start. What could that be?

     

    Suddenly Underextrusion

    in UltiMaker 3D printers

    Posted

    I can´t check at the moment because it is printing the same part again and the change in texture happened at the same height again. So maybe its a Cura problem? Using 13.06.4. I just installed the update.

    I also noticed that the print head does a weird stuttering motion every second layer. Maybe this is because the wall thickness is 0.8mm and the stuttering is there to connect the two layers together. This would explain the more rough surface...

     

    Suddenly Underextrusion

    in UltiMaker 3D printers

    Posted

    My printer used to run great for the last 2 years, but suddenly I get under extrusion in some areas.

    At the moment I am printing a hollow dome with 0.4mm wall thickness. It started off great but then the material turned cloudy and shows signs of under extrusion.

    Why would prints change half way through a print? Could something in the extruder have gotten loose or is there any wear? I´didnt print more than 2kg in the last 2 years. I am using the updated extruder.

    I am using Faberdashery material and had no problems with it previously. The diameter is 2.77mm. I changed it down during the last print to 2.73mm to improve the extrusion.

     

     

    Strategies for Structural PLA parts

    in Improve your 3D prints

    Posted

    I don't think there's much magic to printing extremely strong PLA parts... and contrary to frequently posted opinions, I believe PLA parts are generally much stronger than ABS parts (at normal temps) due to the much weaker interlayer adhesion of printed ABS.

    My "strong" parts usually have 3mm walls and 20+ infill, but don't expect infill to do much... with most parts you'll probably get the most efficient strength just by increasing your walls. Just make sure you're printing hot enough that your parts don't break along your build lines.

    Using a larger nozzle, or simply telling your machine you're using a larger nozzle in Cura, can do a lot to make big, strong prints happen quickly. It also makes infil more meaningful, since 0.6mm beads, for example, bond much better to themselves and others when making infil.

    These parts I printed are quite strong: http://www.thingiverse.com/thing:278290

    So are these: http://www.thingiverse.com/make:71656

    Both describe their settings.

     

     

    Wow I can't believe they didn't break.

     

    Strategies for Structural PLA parts

    in Improve your 3D prints

    Posted

    I was wondering what your strategies for structural PLA parts is.

    For an example, lets say you want to print a heavy duty mount for a book shelf:

    1. Print with 100% infill.

    2. Print with 10/20/30% infill.

    3. Print hollow and fill with construction foam. (Or some infill?)

    4. Print hollow and fill with epoxy resin.

    5. Wrap with epoxy drenched carbon fibers or Kevlar.

    So far I tried 100% infill parts which are amazingly strong but also take forever. Epoxy Resin was also quite strong but created a mess.

    Have you tried any of these? Has anybody else? How would you do it?

    If there are no good answers I might consider it for my final year project at University.

     

    Advice for Flexible Material

    in Coffee corner

    Posted

    I need to print a flexible ball that can be grabbed by a robotic hand and be gently squeezed. Something like a stress ball.

    What material can you recommend for that? Got an original Ultimaker and printed many things but only with Faberdashery pla so far.

     

     

    Not an Adult Toy Print

    in Improve your 3D prints

    Posted

    Thanks for the advice. I thought it was only a loose belt. Since the problem is not that big I will keep it as it is. I am so happy with the results that I get at the moment that I dont want to change things.

    There are massive improvements when I compare my prints from last year with this year.

     

    Not an Adult Toy Print

    in Improve your 3D prints

    Posted

    It looks like one but it is not. Does anybody know where this artefact comes from?

    It was printed in the orientation as on the picture. I also noticed that the front belt is a bit looser than the back. But since the quality is already quite good I dont want to make it worse.

    (Using Cura 13.03. I dont think this is a software problem. I know there is an update but why change a working system?)

    LQyhI4K.jpg

     

    Print Time Estimation wrong

    in UltiMaker Cura

    Posted

    Illuminarti is spot on here. The times calculated in Cura do not account for acceleration, which can cause anything between a 20% and a 100% error. It's pretty hard to estimate printing times, unless you fully simulate the machine (which I might do some day, if I have one of those mad-coding days)

     

    I am disappointed Daid.

     

    Suddenly Underextrusion

    in UltiMaker 3D printers

    Posted

    Thanks Daid, do you know the time of the day?

    Oh Daid, and you know what would be cool? If Ultimaker was to offer a Laser Cut Tool Holder that you can slide on the side of the ultimaker. So you can place all your pliers, knifes and tweezers in there.

     

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