Up until today I printed abs with a heatbed, 2.5mm thick glass, and then kapton tape. It worked pretty well until the glass cracked trying to remove a piece. So until I get another piece of glass, Im trying to print on the heatbed with a layer of kapton tape. But for some reason my prints now turn out like the attached image. Thats supposed to be a hollow cylinder. Any ideas about whats going on?
Printing abs at 230/120C on a mendel90. Thanks for any help.