Hello, i have a probkem with my reprap and i can’t print because of it. My PLA filament is curling inside the hotend and not comming out from the nozzle. It is very hard to push it like it is not hot enough. I am extruding at 230 and nothing comes out. Can the filament be ABS not PLA. On the package it says PLA.
Heat is your problem. Heat is rising up in your hotend and melting the filament too early, making it to curl like your first picture shows. That’s also the reason that E3D Hotends (look them up) have a fan blowing at 100% at the hotend all the time. You want to have a hot zone at the bottom, and a cold zone at the top of your hotend.
What kind of Hotend do you have? A picture could help.