First post, so a little background first:
I am quite new with the ultimaker 2, I had it for 2 months now. I do have a lot of experience with the makerbot thing-o-matic.
Ok, so my teflon spacer scored from the inside and is brown from burning in the hot end. I did print with the provided PLA roll at first but switched to ABS right after that and printed some ninja flex in between.
My hot end was at 240 celsius and I use the Robert's feeder since the original one wasn't up to the task with ninja flex.
Everything was fine for a while, really didn't have any major problems, but then with retraction, the hot end would jam up.. So there are some deep grooves and scoring marks in the teflon part.
I submitted a ticket, and ultimaker replied quite fast.. I don't know yet if they will send me a replacement teflon spacer, but I believe I will have more problems with it in the end..
SO, I was wondering if someone made a ceramic replacement Spacer? I was going to try and make one, but machining ceramic on the cheap is going to be quite challenging I fear!
I know there is the e3d all metal hot end, from my quick search on the forums, it looks like it would be a great replacement .. However, I do feel a bit foolish to have put all that money in a printer and change everything after 2 months!
With my thing-o-matic, I NEVER had to disassemble the hot end and it definitely NEVER jammed up on me.. I'd like my ultimaker2 to have that same reliability