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Posts posted by skewcrap

  1. Hi Community


    I have an Ultimaker Original and I have been using it for 3 years now. The printer can produce very nice prints in PLA, but the printhead (especially the hotend) are a pain. Maintenance is very intense and time consuming.


    I already changed all belts in the past, and of course I switched to the heated bed. Now, I'm looking for an option to completely change the printhead. The teflon coupler is almost $20 and has to be changed just too often, even though I only print PLA.


    What options do I have to change the printhead? Basically I just want to reduce maintenance. If it's possible to print even ABS after the upgrade, its welcome, but it's not mandatory.


    For example, E3d V6 hotend: Has anyone made the switch from the original printhead to this one? What are advantages / disadvantages? What modifications have to be done?


    Are there any other options out there?


    Beside this intended upgrade, I also consider buying another printer due to two reasons:

    -dual printhead; I would like to be able to print water soluble support material as this would remove many constraints I often had

    print volume; the UMO print volume is often limiting, and I would like to increase it. Raise3D seems an option to me.


    Buying another printer is another topic, and I would first like to upgrade my UMO.


    Any advice would be appreciated.

    • Like 1
  2. Hi


    I print a self made cover of a cable duct with PLA with my UMO. Printing basically works fine, but there is one feature I would like to optimize. I think the problem is that the slicing of cura is not ideal for the geometry. See the feature marked in yellow in the attached image. First, I printed without the inner whole in the corner. Since I had overextrusion in that part, i made the whole because i thaught that printing without infill would be possible. But now, the print quality in the corner suffers.


    Are there advanced settigns in cura to change the way this feature is printed? Do I have to try another slicer? Maybe the feature of veriable extrusion offered by simply3D could help?


    Thanks for any advice.


  3. Ok, i will give it a try with an even higher temp and layer height 0.2mm. When I tried printing ninjaflex the first time 2 years a go, I just wanted to try. The results were pretty good, which of course increased the expectations.


    What I just don't understand is that the walls basically don't suffer from underextrusion but primarily the infill.



    Flexible materials are not really considered reliable for bowden printing, so I wouldn't get my hopes too high regarding the expected results.


    So, how do you print flex material reliable?

  4. Hi


    I'm struggling printing Ninjaflex with my Ultimaker Original. I tried printing with the following settings:

    Nozzle: 0.4mm (3dsolex)

    Print speed: I tried 10 - 30 mm/s

    Temp: I tried 230-250°C

    Bed: 50 °C

    Layer height: I tried 0.15 and 0.1mm

    I tried with different values for flow and filament diameter, seems to have no impact at all.


    I often have underextrusion, especially in the infill. At the moment I try printing a cylinder with D=20mm, H=20mm, so basically a really easy geometry. I print with 100% infill, but it ends being rather 40% because of underextrusion. The walls seem quite ok, but the infill is crap. I have a bondtech extruder and normally I don't have any issues with extrusion.


    I already changed all wear parts of the print head including the nozzle and the teflon part.


    Could it be bad material? The ninjaflex is approximately 2 years old.

    Do I have to try a larger nozzle?

    I don't know what else might be the issue.


    Any help would be highly appreciated.







  5. @ jhertzberg

    I don't quite understand what you said, the length of the belts should be ok, I'm not the first one who tried the ones from robotdigg.com. The old probably were in use several 1000 hours, so I would assume it is normal that the new ones are a bit tighter than the old ones?

    @ neotko

    I will check that. But I can hardly imagine that this is the single reason having to apply that much force to move the print head.

  6. Hi everyone

    I have an Ultimaker Original and 2 days ago I performed the upgrade from XML to GT2 which means:

    - I changed from the original XY Blocks to Lars ones (https://www.youmagine.com/designs/lars-ultralight-ultimaker-xy-blocks). This includes also new 12mm bushings from robotdigg.com

    - I changed all belts and pulleys from XML to GT2 (ordered as well from robotdigg.com).

    Basically, everything worked out in terms of assembling it. I changed the step values in the Ulticontroller, and it prints.

    - Pullyes are no longer wobbling.

    - The belts are no longer loose, but tight.

    But I'm quite worried, because:

    - Print quality did not improve, at least I could not find any improvements in the parts I printed so far.

    - The print head is quite unmovable by hand. There is a huge force required to move it by hand. I have to hold the printer with one hand, otherwise I move the printer and not the print head when applying force to the print head. I did the axis alignment with the axis suqare tool (https://www.youmagine.com/designs/ultimaker-xy-axis-square), the axis are well aligned. When I loosen the screw which holds the XY bushing, the situation is improved, same for the two screws which hold the 6mm rod. If I move one XY block instead of the print head, less force is required, but it's still way to much.

    Do you have any reccomendations? I mean, I have to thighten the screws right? Mechanically, the reason for the problem is quite simple. But I just don't know how to practically improve the situation?

    At long sight, it is not a good idea to have a print head which can't be moved by hand?

    Thanks for your help.

  7. @ gr5

    I know that bed levelling is very important. I have done it as good as possible. Sometimes there are some spots, where the filament is actually squished to much, but I have just 3 screws to adjust it. If the glass plate itself is uneven, I can't correct it.

    The problems I encountered did certainly not come from a bed levelling issue. The filament just did not stick at all. Well, I have to admit that this particular filament is quite cheap, but after I bought the first roll, I made some tests which were fine.

    From my experience so far I conclude, that there must be quite big differences for the very same PLA (which means with the same colour). So how do you evaluate which type of PLA to buy? Well, you might get some tendencies, but finally you have to make your own tests.

  8. Thanks for your replies. I guess, basically in my case it was a PLA issue. I tried a different brand of PLA which sticks perfectly now. It's just a little bit strange that there are such huge differences for the very same PLA. Is it possible that there are big differences even for the same roll of PLA? I mean, before the sticking issue started, I printed more than 1kg of that particular PLA with good results...

  9. Hi everyone

    I'm using an UMO with heated bed and I'm basically printing just PLA. I really had satisfying results, but recently I have trouble with the print not sticking to the glass.

    I print with 210°, 65° heated bed, first layer thickness is 0.15mm and bed levelling is fine. There are always smaller spots where the PLA does not stick properly to the glass. If these spots are near the borders, the print is obviously starting to detach. I tried to clean the glass with ethanol or soap and water, but it did not really solve the issue.

    Therefore I have a simple question: How do you clean the glass plate? Should I try aceton?

    I know that you can use hair spray to improve adhesion, but this is cumbersome and it really should not be necessary for PLA?

    Thanks for your help.

  10. Hi everyone

    Are you guys still working on a double fan solution for the UMO non +?

    I'm interested too, but as I do more research I just get more confused.

    I need a fan shrould which is working with Lars custom XY Blocks, and I need two fans.

    But as I do not know for sure what the actual voltage of the UMO ist, I don't know if I have to order fans to put in series or in parallel.

    I'm quite surprised you find plenty of information on how to change belts and pulleys but not really a solution for a dual fan upgrade?

    • Like 1
  11. @ bondtech

    Thanks for your reply. The manual is for the QR 1.5, fine if it is also valid for the 3.0, but it's not indicated. If something like my modern art happens again, i will consider limiting the power.

    I don't want to blame the bondtech for beeing to strong ;-) I'm running another print right now, and it seems pretty ok so far...

    Another issue I have to solve is that filament change is not quite comfortable at the moment. It seems that the bolden tube does not fit perfectly into the bondtech. A big effort was needed to insert it somehow. When I want to insert the filament from the bottom, I can't put it through. For me it seems as the filament is blocked by the edge of the bolden tube, which might be caused, since the bolden tube is not inserted enough deeply into the bondtech. Could that be the case?

  12. Ok, here are som clarifications:

    - I was able to remove most of the PLA, I just heated up the hot end, further used a hot air blower. The PLA broke into parts and I was able to remove it quite easily.

    -The printer settings were: First layer thickness 0.15mm, first layer print speed 20 mm/s, temperature 215°C, heated bed 65°C, bed levelling was fine.

    For the E-Step setting I put 492.5 which is a value I found in the bondtech forum. If it's wrong, I should charge bondtech since they don't think it's necessary to include a manual (for the QR 3.0 I could not find any in the net at all).

  13. So you would assume that the print just did not stick to the heated bed plate (it was 65°C)?

    How would you clean it? Ethanol?

    Regarding the bondtech: Can you install it the wrong way? I mean, I changed the E-steps with the Ulti Controller, but since there is no manual for the QR 3.0, not even on the bondtech website, I'm not sure if everything is set up correctly.

    At least the test print was fine...

  14. Dear community

    I have an Ultimaker Original. My printer is not perfect, there are some various issues, different things I want to improve. Recently I installed a new bondtech QR3 since the original extruder broke. I made a test print, and the result was fine.

    Then I started a longer 8h print, and when I came back, this was the result:




    Does anybody have an idea what happened? The hot end was completely covered with PLA.

    Maybe I could sell the pieces as modern art^^




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