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About jpnovmen

  • Birthday 04/14/1973

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  • Field of Work
    (Product) design
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  1. I only want to say I am suffering the same problems with MATERIAL.TXT as lepaul and m42e I have posted my case in Very long retraction problem with ApolloX (Formfutura) and What are the various parameters in the MATERIAL.TXT file? threads, as I didn't discovered this topic before. As far as I can see, there are two bugs: 1.- Importing MATERIAL.TXT is not working well, as retraction parameters loaded are not correct (always stores 255mm and 60mm/s). 2.- Importing MATERIAL.TXT is not permanent, as when the machine powers off the new profiles disappear.
  2. Absolutely right! Thank you! Yes, I am using last non beta version of Cura (2.3.1) with last firmware updated with it. I should have checked the values of retraction in the machine before, but I didn't think that the importing of MATERIAL.TXT was failing as the system was telling me that it was being imported without problems... In my MATERIAL.TXT the retraction was set to 6.5mm and 25mm/s, but after importing the real values stored in the machine are: 255mm and 60mm/s So it is a bug, as well as that the imported materials disappear after turning off the machine, as it is also reported by Spirou42 in the link of your reply. I had written a post about it in this thread . I assume I must create custom profiles in the machine instead of importing them, at least until Ultimaker fix the bugs. Thank you, again!
  3. I have just tested another Formfutura material (Crystal Flex) and I have the same excessive retraction problem... I don't really understand as this new material has completely different properties than ApolloX. Is is much more flexible and has a lower print temperature. I have try it with the 0.4mm nozzle and it prints very easily, except for the retraction problem. Again, as with ApolloX, it makes a bad retraction even before starting the real printing: just after extruding the test material and before printing the skirt. And continues doing bad retractions for each programmed one. Very disturbing...
  4. I am learning to deal with this material with the 0.25 nozzle. At the beginning I had problems with very long retractions (about 20cm or more, nearly as if I was changing the material) each time the printer began to extrude. I solved that thanks to the community, as I read that the problem could be caused by too low temperatures and too fast speeds. I tweaked the profile and finally I could get a smooth print. But this was with retraction off: I turned it off to make the printing easier and get rid of a possible cause of problems. Finally, I turned retraction on as it is needed to avoid stringing over disconnected zones of the model. Unfortunately, the extra long retraction problem returned again, this time doing it each time a simple retraction is programmed (even in the first retraction after extruding a little material and then beginning to print the skirt), causing grinding and under extrusion, and ruining the printing. I have tried reducing the speed and length of the retraction by changing the parameters in MATERIAL.TXT. I think in UM2+ it is controlled by this file and not from CURA (more of this in: https://ultimaker.com/en/community/19700-what-are-the-various-parameters-in-the-materialtxt-file). But the abnormal retractions continue. I have changed back to PLA with the 0.4 nozzle to check if it is a SW or HW problem, but retractions work fine here, so I think it should be something related to the characteristics of the ApolloX material and the retraction parameters but I don't know what to tweak next. Any ideas? Thanks!
  5. I have just beginning to test new materials with my UM2E+ and I have the same problem FLG reported: my printer loads the file with the new material and I can use it, but when I turn off and on the printer the new material disappears and I have to import again the MATERIAL.TXT file. I have not found any menu option to save to eeprom (neither in material setting nor in motion settings) I have added the new material at the end of MATERIAL.TXT file: [material] name=ApolloX temperature=250 temperature_0.40=250 retraction_length_0.40=6.50 retraction_speed_0.40=25.00 temperature_0.25=250 retraction_length_0.25=6.50 retraction_speed_0.25=25.00 temperature_0.60=250 retraction_length_0.60=6.50 retraction_speed_0.60=25.00 temperature_0.80=250 retraction_length_0.80=6.50 retraction_speed_0.80=25.00 temperature_1.00=250 retraction_length_1.00=6.50 retraction_speed_1.00=25.00 bed_temperature=90 fan_speed=100 flow=100 diameter=2.85 I have parameters about retraction because my original exported MATERIAL.TXT have them. I haven't read anything about them before and I suppose that with UM2+ retraction is a material specific parameter not controlled by CURA, the same way as nozzle temperature is. Can anyone confirm? Does anybody know how to make importing materials permanent?
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