Bommes

We checked your suggestions and found one of the rods was indeed not perpendicular, so after fixing it we're hopeful there are no more problems with our prints Right now I'm waiting for the print to finish and then we'll know for sure. At one time in the past one of the axles came loose during print (probably because it wasn't screwed in properly in the first place or came loose over time) - the misalignment most certainly happened then. Thanks again for the help, I'll do a quick update via edit once the print is finished!

Thank you very much for your suggestions, I'll go through them tomorrow and report back! The printer is an Ultimaker 2+ which has gone through quite a bit of print time by now. I haven't done much maintenance other than keeping the rods mildly oiled and making sure it's calibrated for use, all parts are clean etc.

Hello, I'm using my Ultimaker 2+ to print a disc shaped object with a diameter of 124mm, but despite showing the correct diameter in the slicing software the finished print is slightly oval with a diameter difference of up to 0.8-1mm between the x- and y-axis (for example 123.8mm and 124.6mm). It's obviously not much, but since the finished print is intended to rotate at a few hundred rpm I'd prefer to get it as perfectly round as possible to get rid of as much unbalance as possible and keep the stress on the part as low as possible. Has anyone encountered similar problems and knows how to get a better result? I've tried both Cura and Simplify3D as the slicing software with no difference between the two. Thanks for your help!