Ciao xnotar! Si avevo intuito che ottima calibrazione significa ottima stampa... ma non capisco il perchè di tutto cio visto che la prima stampa che mi ha fatto con una base strettissima ed almeno 13 cm di altezza è andata alla grande. Scusa l'ignoranza ma per ottima calibrazione significa che tutti i valori devono essere prossimi allo 0? Comunque loro (i cinesi) mi hanno risposto in maniera molto celere direi... "From what I can see in your movie, you need to lower the bed in total with the set screws at least 3mm before attempting the first calibration. When you try to calibrate the bed, the figures you see are the offset compared to each other. This is not the final result. This offset needs to be within 20 points (on the 3 measure points). And we suggest the number to be between 200 and 250. In the movie at 2:00 min you can see how the machine measure this offset. Your measurement are at 135,185,125, which means the head is too close to the bed. Movie: http://support.xyzprinting.com/eu_en/Support/tutorial#65 After this, please refer to the manual or movie: Quick manual: http://support.xyzprinting.com/eu_en/Support/document Hope this helps with the calibration process. It will take some time to setup everything perfect, but the better the calibration, the better the print result. If you have any more questions, please contact me again"