Harshit

i was using polycarbonate filament in Ultimaker 3 to print a 20*5*5 cm3 object. I observed a problem,that the material was not sticking to bed surface. I tried doing a small print which was printed very well. I kept bed temperature 105C and nozzel temp 260C. Any suggestion how to solve this issue?? May be changing bed (suggest material) or changing settings? Thanks in advance