I have a Prusa i3 Mk2 that I got in May. From the start I managed to calibrate it very well and got very decent prints for 2 months. In July unfortunatelly we had a fire in our house and I didn’t use my printer until yesterday. I printed a curtain hanger for a friend, very small footprint (outline dimensions are 48,5 x 145 x 14 mm and the whole thing is made as a Z shape with 2 mm thickness) The first print was prepared in Cura, 60 mm/s, 20% infill, 0,2 mm initial layer, 0,15 other layers, 0,8 walls, 205 nozzle temp, 55 bed. There was delamination happening from the start and in the top layer nothing overlaped. Vertical holes ended up being oval. Print was terrible. Forbthe second print I cut speed in half, result was insignificantly better. For third print I used Prusa Slic3r, again 30 mm/s speed, I bumped up the infill to 40%, overlap 50% and it was much much better. Got a stronger print but the quality is still pretty poor. Side walls are a lot better although rough (can feel every layer under fingernail), and it had artifacts above support. Surfaces that were printed on top of supports were comoletely ‘stringy’, they hold together but you can see every string. Vertical holes a lot better but still slightly oval. Top layer was much better a swell but again there were holes between infill and side walls. I thought I had a too small print so I tried printing a quick batman logo that comes with Prusa on the SD card. Top layer has a couple empty lines between two lines of infill, bad overlap with side wall. For the last six months I dusted the printer from time to time but I didn’t store the filament in a moisture free enviornment so i don’t know if this could be that my filament got excess moisture? Or maybe I should try cleanning the nozzle? The printer was moved after the fire bit is now at the same place as before. I did the calibration again and it worked first time. Even my live adjust Z value is almost the same as before (maybe 0,01 mm lower). V2 calobration and some custom Z calibration prints came out nicely. Nice sticking to the bed, smooth bottom surface. Although I did notice that the bottom sometimes has some small holes in it, or artifacts that look like scratches. Bed is not damaged and was cleaned twice before first print, dusted and then wiped with acetone. I just need a troubleshooting starting point, I could order a new filament but I’m not sure if that could solve the problem, so I’d like to check anything mechanically before I get a new filament.
