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Daid last won the day on April 23

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About Daid

  • Birthday 01/01/2015

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  1. Update on this one. We've found the problem related to abort and too much or too little priming in the next print. We're still working on the proper fix, as it's a complex interaction of motion being aborted while the rest of the system is continuing with movements to abort the print. All this causes filament positions to be out of sync and thus the large amount of priming later on.
  2. Actually, something the config files could be causing this problem. So it would be nice to have those as well.
  3. Daid

    Feature Request: Linear Advance

    Nope. Linear Advance isn't a new idea. There where attempts at it back in 2014 or so. But getting it to work really properly in all situation is hard, the bowden style UM printers make it even harder. Currently, we are actually hitting performance limits in the motion controller already (something we are investigating and improving), making it more complex will not help on this area. And will most likely make high detailed prints look worse instead of better.
  4. Daid

    Ultimaker 3 firmware...Wishlist item!!!

    If there is no material present in the printer, you can just swap a printcore without using the menu. (As long as it is cold) bit of a workaround, but saves a lot of time 😉
  5. Daid

    Layer resolution range

    3/4 of a nozzle size is pretty much the upper limit for a layer height. So 0.3 is possible with a 0.4 nozzle. But with thicker layers, you want a larger nozzle size. 0.2mm is our highest layer height for our provided profiles for a 0.4mm nozzle.
  6. Note that the active leveling system is very sensitive. Most likely, the system is introducing some kind of "softness" in the system that the active leveling cannot handle. Which looks for the sharp transition of not touching the bed to touching the bed. It has not been engineered with this upgrade in mind. And it was already complex enough to get working without this. (As far as I know, these upgrades are not officially supported, sorry)
  7. Amount of filament left will be be an indication. Note that we already track this with NFC spools, but only by the amount that we think we use, and thus is off due to material slip. Also, with the end-of-filament detection of the flow sensor, why not start a print even if there isn't enough material on a spool? Use up ALL your material. Finally. Apparently, the S5 feeders current design almost fits the UM3, mechanically. There is the point where the motor needs to turn the other way around. And some part will grind against the back panel. And if you have an UM3 with flow-sensor cables, those cables are a bit on the short side for the right feeder. With a bit of work, it can fit according to our mechanical engineers. But there are currently no plans to put this out as an upgrade kit, as I said before. The general consensus seems to be against upgrade kits.
  8. Ah, you got that wrong. ColorFabb buys their raw materials from these companies. Or in a car analogy, ColorFabb is your local car shop+repair, these companies are the car manufacturers. (Does not go up entirely, but shows the difference in operation scale) These material companies are the type where you ask for a sample of material, and they ask how many metric tons of pellets you want, not a few kg, tons. They make the plastics themselves, not the filament, the knowledge they have is huge. (Most likely the production chain is something like, Oil->Shell->DSM->ColorFabb->Ultimaker3->3D-Print, but I could be slightly wrong here)
  9. Daid

    Ultimaker AMA

    Actually, you have that history the wrong way around. Marketing wanted BuildCore and SupportCore. R&D corrected them, and explained that the cores are not specific to build/support materials but to specific material properties. It wouldn't be strange that some exotic build material needs to be printed in a BB core (I look at you "woodfill")
  10. Daid

    Ultimaker AMA

    Which wouldn't be called AA then, but a different letter. After all, the letters indicate the type of PrintCore.
  11. Sounds to me like a problem area actually. PLA or PVA above 45C is problematic to catastrophic. So you wouldn't want that in a heated build environment...
  12. We found and fixed the cause of that (the cable isn't properly clamped at the head, causing it to wiggle in the connector and lose connection), I think you can get a replacement top of the printhead, or put some thick tape in the clamping to solve that problem.
  13. I always jam the Hex2mm screw driver into the UM3 feeder lever to push it at the office (At home I have an UMO, that always had a quick release) No guarantees on that, but it would have been silly not to have the option in the future after we identified this issue. It's a bit like the new extension port, better be prepared.
  14. The sensor is an encoder wheel touching the filament, so mechanical. Optical simply doesn't work. If you want it to work for all filaments you need 2 different wavelengths of light, and it will get dirty. (If I remember right, black nylon almost completely absorbs IR light for example) As far as I know, the feeder wheel is almost the same, except for it no longer wearing down on carbon filled materials. Those materials will still ruin the normal PrintCores. Oh, but there is a quick-release lever on the feeder now. Instead of the tiny handle that you couldn't hold down for longer then 10 seconds without hurting your fingers.
  15. On the flow sensor, in theory it is simple, put a rotation sensor on the filament, check how much rotation you are getting compared to how much you are asking, differs by X, flow problem and pause. In practice however, you need to get that sensor always touching the filament. Always. Without deforming the filament. This is actually a bit harder then it sounds. Some designs worked fine for a few spools of material, and then suddenly have a 2 cm extrusion of "no touching" due to some mechanical problem. Next, how much filament we ask and how much we are getting is not a 1:1 relationship. Even tough our prints are coming out fine, there is a lot more happening then you initially expect. Filament itself compresses in the bowdentube. There is pressure in the hotend that slowly relaxes, and a retract+unretract does not move equal distance. The back-pressure of the build plate on the first few layers causes under-extrusion. Just to name a few things that can cause false triggers. And those are just the things I know, and I wasn't even on that team!

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