juj

Hi, I noticed while printing the base of this object http://www.thingiverse.com/thing:788360 that the printer systematically makes scratches to the bottom layer, which are quite visible as a result. Here is an image to show the effect: The left one was printed with Cura "high quality" default setting, whereas the right one was printed with the "Normal print" setting, but in the Expert settings, "Z hop when retracting (mm)" was set to the suggested 0.075. Both prints were done with Platform adhesion type = None on a clear build bed. The scratches look systematically the same, and I observed that the nozzle travels through that pattern during printing, as also seen in the Cura software: Has anyone observed something similar? If you have suggestions on what settings to use for a "please don't scratch my print" configuration, I'd be very happy to hear!

Hi there, I got my new Ultimaker 2 this week, and I've been able to do some nice prints already (https://dl.dropboxusercontent.com/u/40949268/dump/CIMG0031.JPG and https://dl.dropboxusercontent.com/u/40949268/dump/CIMG0056.JPG). Today I noticed while observing it printing that the nozzle of the printer sometimes hits the layer of material underneath it, enough to make an audible tap/click and shake the material a bit. Also, the build plate occasionally shakes a little as a result. I made a video to attempt to demonstrate: https://dl.dropboxusercontent.com/u/40949268/dump/VID_20150513_235625.mp4 (2:00 minutes, 170MB), though not sure if it shows there very well. Does this sound unusual? I attempted calibrating the build plate two times, but the same effect does seem to persist. How thick paper do you use when calibrating? In my calibration I've used one layer of A4 paper, which wikipedia says to be about 0.05mm thick. Is that too thin in general, I wonder if I should instead use a thicker sheet of paper for calibration? Thanks!