mitu

Thank you for your answer 🙂 My experience in robotics tells me that it is not about mechanical inaccuracies. Mechanical inaccuracies will give you a bad first layer (with all the consequences), but not more. The dimension is given by the steps of the motor, diameter of the wheel (number of teeth) or the lead screw pitch. These are accurately machined parts. I'm sure the printer is much more accurate than what it prints. If you make a 10mm part and it is 10.2 you cannot assume a 0.2 mm inaccuracy in 1cm of belt (actually drive wheel). The only real mechanical problem with the printer is the filament drive mechanism with loooong tubes, but this also cannot explain all the errors. Probably the only problem is the fact that the Cura configuration files are not refined as they should be. The whole printer gives you the impression of a ready to use, push-one-button tool. You have a huge display that shows NO technical details while printing (this is really frustrating), there are long periods of time for "preparing" or other operations while you don't know what happens or if anything happens at all or you should simply restart the thing... You would expect everything is then refined to the last detail, you just press "print" in Cura and it works. Well, no! You have to tune a lot, it doesn't simply work. Again you would expect that from a DIY toy, like Prusa, but not from a "professional" printer. For what I paid I should have this work already done by someone else for me and I should not have to waste days of my time to finish someone else's work.

I found this topic while searching for a solution to the same problem. I have to admit I am really disappointed. I'm new to Ultimaker, I used Prusa for some time before buying the S5. I wanted the S5 for the dual extruder. Without any calibration on Prusa all the parts (in PLA or PETG) are unbelievably accurate (+/- a few microns). If you make 2 parts with the same dimensions (one on the outside and one on the inside) they will simply fit together. Buying a printer that is ~ 7 times more expensive I assumed even better quality. Well... unfortunately I cannot return it... but I probably never use it - I simply need very accurate parts.