unusual print failures
Hello,
I finished assembly of my MK4S a little over a week ago and the first few prints were stellar. After this Monday though, all 15 prints I have attempted have failed, these failures have all occurred between 35 and 75mm in Z height. What happens is it prints flawlessly until all of a sudden one layer prints super stringy and then 1-2 more layers are placed and after a total of 2-4 crappy layers the print shifts at which point the printer stops, claiming the nozzle is clogged (it's not) and the print is ruined. This happens with ALL the prusament types I have.
The steps I have taken are:
1. Checked and tensioned the X and Y axis belts.
2. Removed the heat assembly and nozzle and did everything I could to clean it
3. Tried various print temperatures and even intentionally running it slower.
4. Tensioned the extruder idler.
Does anyone have an idea what could cause this?