When I bought my printer (about 4-5 months ago) I bought 1kg of PrimaValue PLA Black with it and it has been working fine. Resently I wanted to get inte printing with ABS since I wanted stronger parts. I thought my other fillament was fine so I went out and bought 1kg of PrimaValue ABS White and tried to print with it.I began with removing my old PLA with the inbuilt function and then adding the new fresh ABS, also with the inbuilt function. When addign fillament it goes up to 210 then you are supposed to put the fillament in, then you can feel it going down inte the hotend. I felt it going down but it won't extrude. If I push it, it comes out just fine. After I remove it again you could see heavy markings from the motor on the fillament. I don't know what to do after removing the ABS adn putting the PLA in it works just fine. But I can't seem to get ABS working, is it just a bad roll?