Greetings!
I've been having issues printing on an Ultimaker 3 Extended. The PLA nozzle stops printing after several minutes within the start of the printing process.
I've tried hot & cold pulls multiple times, changing the feeder pressure force, manually reducing the temperature of the core, but it didn't solve the issue. So I changed the print core with a spare AA one. It did one print successfully, and then the same issue occurred. It also clogs itself within the first several minutes.
The attached photo shows what the material looks like in the print core, when the clogging occurs and I unload the PLA.
Now, with the new print core, I am leaving everything as it is suggested by the Cura recommended profile. Only the pressure force on the feeder is set to between the mid point and top-most position - hence, a little "loosened". Any suggestions as to where the problem might come from?