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happy-robot

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Everything posted by happy-robot

  1. I have finally had time to print the same g-code with lower acceleration (1500). The surface looks much nicer but still not as nice as our Ultimaker original. Im satisfied with the result but hopefully I will have time to experiment a little bit more in the near future.
  2. Thank you illuminarti and gr5 for quick responses. I will definitely try to print it again with lowered acceleration. Regarding the angle/notch All three fans are working properly. I had to change polarity on the hot end fan when the machine was delivered but other than that they have worked fine. I have tried different speeds on the fans in the tune/fan menu and it's no problem there. The Cura used for slicing was 13.12 since it was actually sliced before christmas. I will double check if the fans turn on gradually but I believe they do. The fact the the UM2 doesn't save all the setting when its power cycled is a bit annoying but I'm aware of that since I have played around with the retraction setting a bit when printing support with meshmixer 2.0. It seems that some settings are easier to save than others and that you sometimes can exploit that by "fake" changing that setting as well (like the LED strips), thus getting the one you want changed to be saved but I have not got any consistent results. Anyway, I will get back to you with a print with changed acceleration and the same g-code.
  3. Hi everyone, Before anyone wonders I will start by saying that the word on the opener in the picture is an internal joke between me and a friend and has very little to do with this topic. It was just the model that I printed when I realized there was a difference in printing quality between our Ultimaker original and our UM2. This is my first post in the forum but I am an old Ultimaker fan and user. We have an old Ultimaker original (about 2,5 years old) at our office and since we bought an UM2 it has not got the attention it deserves =( But yesterday we test printed the classic bottle opener just to see if it was still working and as always, it worked like a charm =) This is the model: http://www.thingiverse.com/thing:6661 And I just made holes for the text in cinema 4D I felt that the print came out really nice. I would say nicer than in the UM2... So I decided to take the same SD-card with the same UM1 g-code and print it in the UM2, with the exact same roll of filament. So the only difference would be the machines and the heated bed. What we saw was that there's a lot more ghosting on our UM2. In the attached picture I have increased the contrast so that it's easer to see the difference. You may for example look at the part by the hole in the back of the opener (see the circle on the left side) or anywhere around the text. You can also see it at the curve in the model in the middle (it starts around the end of the D and ends around the A, where the light reflects on the model) There was also an issue with the first layers, where the UM2 had problems printing the angle of the first part of the print (the bottom part of both models, see the green circle on the right side). This is a bit hard to explain but i will give it a try. What happened was that the layers got slightly warped around the edge since the angle and the layer height didn't place that much material around the outer perimeter on each layer. So the layers bended a bit inwards but as the layers became bigger in area the problem fixed it self. That is why it looks like there's a notch in the angle caused by the warp and then the layers on top attached to that warped edge. I had no problem getting the print to stick to the bed, so no warping there. It was just the outer perimeter on each layer that got a bit warped once it started to print the overhang. Has anyone else experienced these issues? A few notes on settings and the printers. The settings in cura: 100% infill 0.1 layer height 40mm/s print speed The Ultimaker 2 had the printbed set to 60C It should also be noted that we have upgraded our Ultimaker original with an Ulticontroller and and the special CNC pullies from Foehnsturm. http://umforum.ultimaker.com/index.php?/topic/1611-fixing-pulley-innacuracy This could of course be part of the issue but it still feels like and interesting discussion. I hope you all agree. Thanks
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