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tomnagel

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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. 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.
  2. 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.
  3. 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.
  4. tomnagel

    Ultimaker question | help us help you!

    Hi gr5, An outer diameter of the spool (G) of 102mm? You mean 201mm?
  5. tomnagel

    "Big" blob and huge retraction UM3 after abort

    @cjs Sorry for going off-topic, but did you change the (material of) your bowden tubes? They look white instead of semi-transparent.
  6. @The_Rob did this error occur during printing, or somewhere in the warm-up phase? I assume it is the latter. You can then maybe avoid your power consumption problems by first manually pre-heating your printbed. When it is hot, it consumes less power since the electrical resistance of the copper traces of the bed heater has gone up.
  7. tomnagel

    Ultimaker 3 Print Hood falling

    your fan bracket not closing properly might also be related to your problems with active leveling (other thread). The measurement pcb is located in this bracket, and when it moves during leveling, this will influence the results.
  8. tomnagel

    Clogged BB Core

    temperatures used to be in those help articles. Maybe they took those out because the printer takes care of that when you follow the built in procedure (UM3 only) (printer also moves the print head into one of the corners, so you can't forget that as well) (edit: I didn't see the responses above)
  9. tomnagel

    Clogged BB Core

    Hi @pfordmedia 35 degrees for a cold pull is too low. The material is much too hard to pull out, and will snap like you described. Please follow the instructions on this webpage.
  10. tomnagel

    Clogged BB Core

    Please don't put words in my mouth. I mean my statement literally, and I don't mean to imply anything else. Users following my advice profit from thorough testing that takes place within Ultimaker. Users who make other choices have to find out stuff for themselves.
  11. tomnagel

    Clogged BB Core

    Disassembly of your print core is not advised and never necessary. With hot pulls and cold pulls it is *always* possible to get your print core going again. Cold pulling with polycarbonate works extra good if you have that. please believe me: PVA printing is reliable on your UM3, if you stick to Cura profiles, UM material and keep ambient relative humidity below 50%.
  12. That is not so weird if you realise that the electrical resistance of copper is dependent on the temperature (resistance increases when it gets hot). So if the heaterplate (of which the tracks are copper) warms up, the power consumption drops.
  13. tomnagel

    Single Nozzle Print Setup?

    True that. Switching between different materials may mean extra cleaning although my personal experience is that it is not needed. Some flushing suffices. pro-tip: there is now a timeout on the last bit of the filament loading procedure. After you have confirmed the filament is fed into the feeder, the printer will feed the filament to the printhead and extrude slowly for a minute or so. You can leave the printer unattended, and use this time-out as a flushing procedure. use the latest firmware, because earlier versions do not have this time-out.
  14. tomnagel

    Single Nozzle Print Setup?

    Both nozzles are heated before active levelling. This is because we need to squish possible plastic remains during the first probe with each nozzle. @Bossler, you mention "print head cleaning seems to be quite often needed with the UM3". What do you call often? Internal tests have here have shown that print cores do not clog even when not cleaned for 2000h print hours, although there is a slight build-up of yuck inside the melt channel. That is why we advise to clean the BB core every 400h. I think that is pretty reasonable.
  15. The sensor that we have implemented is very light weight and hardly takes any space. The measurement accuracy of the complete system is very high, reproducibility is below 10 microns. Next to that, due to the smart algorithms that we created, we measure the distance between glass and tip of the nozzle. A laser might reach 1 micron accuracy, but a laser does not measure between the tip of the nozzle and the glass plate, so you introduce extra errors. And it will probably be heavier and a lot more expensive.
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