futur3gentleman

Just replaced the Teflon spacer after having similar issues, and having printed for several hundred hours. It seems that a lot of the problems that I thought were stemming from my high quality ColorFabb Standard White PLA/PHA filament (which didn't make sense) and poor prints can be attributed to the Teflon spacer. Below is a photo of what the spacer looked like when I pulled it out. Prior to replacing the teflon spacer, my prints were stringy, and in general seemed to look worse and worse. In response I raised the temperatures to 225-230 - which seemed to work for a while. Then I noticed more stringiness, so I thought maybe it was the filament and lowered the speed - which also seemed to work, until it really no longer did. I have printed for hundreds of hours (500+) on my Ultimaker 2. Hope this info helps!

2015.09.18 Update: I discovered that my problems were not with the filament, but with the Teflon spacer. I swapped it out and all of my issues went away. The Colorfabb is actually printing at 210C and at 55mm/s right now which is blowing my mind. I have printed over 500 hours and my spacer looked pretty bad when I took it out. I commented more about it in this post: https://ultimaker.com/en/community/view/16129-ultimaker-2-grinding-at-feeder-mechanism?page=1&sort=#reply-118866 Previous post: I just purchased & used some Colorfabb PLA/PHA in White for use with my Ultimaker 2 and have had terrible experience with it. It is worth noting that White is a difficult color to get right for filament so if you are ever going to experience problems with a filament it will likely be white. I am able to get semi-decent quality with it at 229C (no less) and 25mm/s. Even doing this results in stringy prints at times, but it is much less worse than when I tried to run it at 50mm/s. I tried some generic white PLA which worked fine, and previously I used a roll of white Form Futura which worked perfectly. It really seems like ColorFabb is to blame here as repeated tests with their filament still produce poor prints when other rolls don't even flinch.