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tomnagel

Team Ultimaker
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tomnagel last won the day on March 20 2017

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  • Country
    NL
  • 3D printer
    Ultimaker Original

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  1. You can use the diagnostics menu to see what tags the NFC reader is detecting. If you install only the PLA spool on the printer, what does the diagnostics tell you?
  2. tomnagel

    S5 Active Level

    In firmware release 5.2, Active leveling has become a lot faster because only a part of the build plate is measured (the part that is printed upon)! Model-based active leveling. We've boosted the efficiency of active leveling on the Ultimaker S5. Instead of probing the entire build plate, only the footprint of the model is measured before a print starts. Disabled print cores are skipped to speed up the process. To make use of this feature, prints need to be prepared using Ultimaker Cura 4.0 or above.
  3. In my Cura 4 it is on by default,and I think it has already been for quite some time now. Could it be that you work with modified profiles, that are copied into new installations?
  4. So you try to move 1 inch, and the extruder actually moves 0.7 inch? So an error of 0.3 inch? and what happens when you try to move the extruder 2 inch? Is the error linear with the length of the move? I am asking because I don’t know a single cause that can influence the gain (stepspermm) without changing the hardware.
  5. @mark269, you say your Y-axis "is 7.62mm off". What exactly do you mean with that? If you have an (mechanically, and software-wise) unmodified UM2, using "steps per mm" to compensate for a dimensional error is not a good method. First of all, to be sure: with the Y direction, you mean front to back right? Could there be another reason that your Y dimension is not printing well? Is your printhead moving smooth if you move the printhead (by hand) around the buildplate surface? Are the shafts well oiled? Are the pulleys screwed tight to the shafts? Does the dimensional error scale with the size of your printed object?
  6. I recommend not to use just any glue stick, but the one supplied by Ultimaker. All glue sticks are not created equal. A lot of effort was put into testing, and the Uhu sticks came out best. I’m not saying other sticks don’t work as well, but i’m Sure there are other glue sticks who definitely perform worse.
  7. have you tried this? https://ultimaker.com/en/resources/23132-clean-the-print-cores I have yet to see the first case where disassembly is necessary.
  8. I don't think so. The printers were operated normally, and there was a cooldown between printjobs. I don't think that a pause of a day between prints can cause issues other than PVA taking up moisture. PVA should print reliably, this is tested very thouroughly for years now. If not, let's find out why not. There enough people here who can help, and your reseller should be able to help you as well. Start with a clean BB nozzle, start with dry PVA filament, use Ultimaker filament, use Ultimaker Cura without changing printing parameters. If that does not work, please post pictures of what goes wrong.
  9. Under normal circumstances, it is absolutely not necessary to clean your BB nozzle every few days. We've done 2000h tests on 20 printers, with varying cleaning intervals. Our advice is to clean the BB nozzle after 400h of printing (hot and cold pulls). But even the few printers that printed the full 2000h without cleaning still printed fine. However, cleaning is very important after incidents like empty spool, or entangled filament or any other issue that keeps the BB nozzle hot without any material flow. The PVA then burns in the nozzle, and the nozzle will clog. (a print where there is a very small amount of PVA on each layer could also cause this) Of course this was all tested with Ultimaker PVA. Your mileage with other brands may vary. And @kmanstudios is right: keep your PVA dry.
  10. Dimensional accuracy is a difficult subject. There are many many causes for inaccuracy. Some causes depend on temperature, some on the printing process parameters, some are in the mechanical tolerances on parts etc. It is a topic that is being addressed within R&D, but I realise that does not help you now. I would not advise to adjust the scaling of X Y and Z. That is too big of a simplification, and afterwards when you print objects with other dimensions your calibration will not work, and possibly make things worse. My own experience is that often the inaccuracies are pretty reproducible. A 4 or 5mm big hole prints always 0.25mm smaller than in CAD. So I compensate for that in CAD. You say you have measured inaccuracies up to 1.5mm. That is pretty extreme, and indeed can make parts unusable. Can you share an example of that? An STL and actual measurements, and/or a photo?
  11. I believe that when no material is set for an extruder, the nozzle stays cold during the active leveling. But you should know that it is heated to flatten possible plastic remains below the nozzle. If those plastic remains are cold and hard, the outcome of the active leveling procedure will get an offset, causing the nozzle to be too high during printing.
  12. So the problem stayed with the same printer, after you switched the power supplies of 2 printers? And you are using original Ultimaker Print Cores? Than I think you should contact your reseller. Your problem reproduces and it seems like a heater is out of specification, causing the overloaded power supply.
  13. Temperatures to get good adhesion are about 10 degrees higher for aluminium than for glass. For example, PC has a bed temperature of 120°C with alu. UM2/3 cannot reach those temperatures because of power supply limitations.
  14. Hi gr5, An outer diameter of the spool (G) of 102mm? You mean 201mm?
  15. @cjs Sorry for going off-topic, but did you change the (material of) your bowden tubes? They look white instead of semi-transparent.
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