UltiMaker uses functional, analytical and tracking cookies. Tracking cookies enhance your experience on our website and may also collect your personal data outside of Ultimaker websites. If you agree with the use of tracking cookies, click “I agree, continue browsing”. You can withdraw your consent at any time. If you do not consent with the use of tracking cookies, click “Refuse”. You can find more information about cookies on our Privacy and Cookie Policy page.
geert_2, I think you have the answer. This wasn't happening until I installed a new bowden tube that I purchased from Amazon and it wasn't an official ultimaker bowden.
Here's the left rear after several layers has been laid down. It seems just the raft, leftmost slot, and single hole is affected. Quite puzzling on the cause.
This printer is approx 2 years old and this problem has cropped up while trying to print something that basically fills the entire build platform. The print is 7.5"(19.05cm) X 6"(15.24cm). The pictures are of the brim being printed along with some holes. The bad area starts at about middle of the build plate and going left while looking at the printer. The left back is the worse with the left front not as bad. I should note that I don't hear any type of slipping or chattering. The head movement is smooth throughout.
Left back
Right Back