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reibuehl

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Posts posted by reibuehl

    UM2 and IRobertI feeder - filament snaps behind bearing

    in Third party products & modifications

    Posted

    I see this behavior with new filament and old filament. I have now printed and installed the yoke version with the guides that you mentioned and will give it a try for a while. I modufied it slightly to work without the need for spacers and longer screws and have done one successful print up to now. But since the issue only shows up sporadic, I need to test with that yoke version for a longer time.

    UM2 and IRobertI feeder - filament snaps behind bearing

    in Third party products & modifications

    Posted

    Hi all,

     

    I use IRobertI's feeder (https://www.youmagine.com/designs/alternative-um2-feeder-version-two) now for many years but recently experience an annoying issue: Suddenly, sometimes after a few layers, sometimes very far in the print, the filament snaps behind the bearing in the feeder and then can't be moved anymore. This seems to happen more frequently after I change filament but that might be unrelated.

     

    I already printed new feeder parts and replaced the bearing but nothing seems to help.

     

    Has anybody that uses this feeder - or any other feeder - experienced a similar issue? How could I fix this?

     

    Reiner

    Why does Cura remove some parts of my model when slicing?

    in Improve your 3D prints

    Posted

    I would guess that the parts that are removed are too thin or too shallow so that they are below the threshold of what can be printed with your selected nozzle diameter and/or layer height.

    To try to verify my theory, you could try to enlarge the model in Cura by 100% and then slice the model again using the same settings as before. If the slicer result looks better/has more details vissible, you could try different slicer settings with the normally sized model. You could cange the layer height to be smaller - maybe even only for the top x layers to minimize printing time. If that is not enough and if your printer supports it, you could switch to a smaller diameter nozzle, e.g. 0.25 mm instead of 0.4 mm.

    Cura 3.6 and 4.0 don't start

    in UltiMaker Cura

    Posted · Edited by reibuehl

    I have the same issue. 3.6 was working fine and then stopped showing any GUI. I uninstalled it and installed 4.0 and have the same issue with 4.0. The process Cura.exe shows up in Windows Taskmanager with minimal CPU usage but no other signs of activity. Running it with the "run as Administrator" option doesn't help either.

     

    I run it on Windows 10 Pro Version 1809 64-bit.

    UM2 Probleme, zu wenig Filament

    in Deutsch

    Posted

    4 minutes ago, oobdoo said:

    Kann ein Schlauch überhaupt Kaputt gehen? Das Teflon-Teil Ok, da sehe ich auch als Verschleißteil an. Wobei mein letzter Wechsel auch wieder 1000 Stunden her ist.

     

    Je öffter man den Bowden entfernt, desto eher wird die Stelle, an der das Collet den Bowden einklemmt, zerstört da die Klammern immer minimal anders sitzen und sich so eine umlaufende Furche bildet, in der die Collet-Löammern dann nicht mehr fest halten. Das verstärkt sich dann durch Vorschub und Retraction immer mehr.

    UM2 Probleme, zu wenig Filament

    in Deutsch

    Posted

    Neu bestellen! Wenn der Bowden noch gut ist, sollte es reichen, die Collets auszutauschen. Sonst kannst Du natürlich auch gleich ein Set mit Bowden und Collets nehmen - bei mir sah der Bowden an der Stelle, an der er vom Collet im Druckkopf gehalten wurde schon sehr mitgenommen aus, da hab ich gleich beides ersetzt.

    UM2 Probleme, zu wenig Filament

    in Deutsch

    Posted

    Hallo Alex,

     

    wenn Du das Filament entlädst, hast Du dann an der Spitze eine leichte Verdickung? Wenn ja, dann schau Dir mal den Bowden und speziell die Collets, die den Bowden im Extruder und im Hotend fest klemmen an. Bei mir haben die irgendwann nicht mehr fest genug gehalten und der Bowden ist während des Drucks durch die Retracktions minimal zurück gerutscht, was dann zuerst zu solchen underextrusions und später auch beim Start neuer Drucke dazu geführt hat, dass bei Druckbeginn die Düse verstopft erschien. Tatsächlich konnte das kalte Filament aber mit dem Knubbel nicht mehr ins Hotend eingeführt werden.

    2018-07-05 11.47.40.jpg

    Filament Blob at the end of prints

    in Improve your 3D prints

    Posted

    Since there is so many ways to get from STL file to a moving printer, maybe if you explain your process in more detail somebody has an idea where to check in addition?

    What comes to my mind is:

    • Check in Cura: Manage Printers... --> Machine Settings --> Printer tab --> Gcode flavor. should be Ultimaker 2
    • Chech in Cura: Manage Printers... --> Machine Settings --> Extruder Tab --> Extruder Start Gcode and Extruder End Gcode should both be empty

    Depending on the way you print - SD card, Octoprint, seriall connection, etc. there might be more that influences this.

    You said that this happens when you multiply the same object? Do you do this in Cura? If so, maybe you could test it with a different Cura version once? I still use the old 15.04.6 for most of my prints and have used the multiply function there successfully before.

    Filament Blob at the end of prints

    in Improve your 3D prints

    Posted

    Have you tried comparing the g-code between prints that work and prints that don't work? I would take a look at the end of the g-code file and check if there is unexpected stuff at the end of the file - e.g. from a plugin or a garbled Cura installation/printer profile?

    The file should end with something like this: 

    M107 ; Stop Fan
G10  ; Retract
G0 F9000 X136.470 Y90.649 Z10.000 ; Move back to home position - different values since it is relative to the end position of the print
M25  ; Stop printing from SD card

     

    • Like 1

    Nozzle size request

    in UltiMaker 3D printers

    Posted

    3DSolex was the original distributor of the Olsson Block for the UM2. I have had a number of UM2 nozzles and other UM2 spare parts from them over the last years and was always happy with the quality. As I do not have a UM3 myself, I can't say how it exactly works with their print core.

    I suggest you contact them directly if you need more information than what you find on the web site. They have been very helpful in the past when I contacted them. 

    • Like 1

    Erfahrungen mit versch. Klebestift-Marken?

    in Deutsch

    Posted

    Eine beschichtete Alu Dauerdruckplatte habe ich hier auch noch rumliegen, habe sie aber nie Montiert, da ich dafür die Clips für die Glasplatte entfernen müsste und ich bisher nicht den halben Drucker zerlegen wollte um an die Schrauben der hinteren Clips zu kommen.

     

    Ich hab mir jetzt mal einen UHU Stift besorgt und schau mal, ob es mit dem genau so gut klappt, wie bisher mit dem Staples Stift. Eine Front-Abdeckung bzw. Tür hat bei mir die ABS-Druckergebnisse auch am meisten verbessert. Top-Abdeckung brauchte ich bisher nicht, hat auch so mit Staples-Klebestifft und Tür sehr gut funktioniert.

    ABS Wont Stick to Build Plate

    in UltiMaker 3D printers

    Posted

    15 hours ago, Zwheat said:

    So if I were to cover the printer and get an enviromental case or housing to seal it up a bit, that will obviously keep the air inside a more consistent temp, but how will that keep the build plate temp from falling? The printer is supposed to upkeep the temperature to what I set it to and it isnt...

     

    If the printer looses too much heat to the outside, the build plate heating element might not be powerful enough to keep up with that heat loss over time.

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