I recently purchased a Qidi X-Max, and the first print with PLA went flawlessly. It's an amazing printer, considering the price.


However, I tried to jump over to Ninjaflex NinjaTek (50-55A durometer) and it repeatedly jams within 1-2 hours of printing. I've tried raising the hot end to 250C and dropping speeds below 25 mm/s, but I still can't stop it from jamming. I'm guessing that pressure is building up in the head, but I don't know how to prevent it. Every time, it skips the drive gear and grinds inside the single-gear extruder.


Any suggestions on what to do about it?