JohanOirschot

I will not mess around with the electronics of the 3D printers or any weights i'm convinced that and brand new Ultimaker S5 or an older 3 should be able to do the job. I'm more worried about the firmware that's updated and the Cura slicer itself. Or find a way within these to make the quality more consisted. But you idea to check the feed of the material and maybe a better spool holder with less friction might help a bit. So i will try those out. For settings i just have those lines on different places when i change settings. That is why i still suspect the problem is in there somewhere. Maybe its the pressure in the bowden system or any of those. Ill try to keep experimenting and maybe other people will place their idea's here on this post. Its just i see so many great prints from for example filamentfrezy where all lines are so consisted and he uses Chinese 3D printers or from prusa i3. Ultimakers are way more expensive and should be able to live up to this is some way....

Dear Geert, Thank you for the long detailed reply. Like i suspected it would be a hard thing to figure out. I'm not sure it can be a hardware thing because i own 4 Ultimakers and all have this issue. But i'm gonna clean all the z lead screws to make sure. For settings i always print with 3 outlines to make sure infill wont show trough and because the problem we see is not the the layers where the model is the same i don't think its model related. Do you think 4 or 5 outlines would improve compared to 3? Its also why i started changing jerk and accel to make the 3D printers print layers more consisted the Ultimaker default settings has so many variation in it. For material i only use Ultimaker or Colorfabb and so far i know these are really consisted materials. For testing i tried other spools as well to make sure. The only thing i might need to improve is maybe the way i use the spools. I mount them on the back or on an external spool holder maybe this can use an upgrade to improve. i will look into it.

Thank you Geert for your reply, but i also have this on large models 20x20cm. Any idea's?

I'm struggling for a while to make my ultimakers S5/3 print better with a consistent skin quality with cura. I found changing the jerk and accelerate settings helped me a lot here together with some other small tweaks like lower themps and 25mm/s print speed (i printed around +-50 xyz test cubes to see what is happening with cura settings). But for some reason i get artifacts in the skin on places that i cannot explain (On the picture i pointed out what i mean with these artifacts). Its not always on a position were are bottom or top layer would start for example. The thing i'm looking for is a really high skin quality that is consistent i don't care about print time, consistent good quality is everything to me. I hope some one can advice me what to do to get a better consistent surface quality with cura.