Colorfabb HT filament printing issue  

Colorfabb HT filament printing issue

Hi,

I have some problems with printing Colorfabb HT filament. When I start to print, the printer cleans the nozzle as normally but then it stops and asks to unload the filament. Strip that comes out for cleaning doesn’t seem correct and in the first half there is almost nothing sticking in to the bed. After it stops, it asks to unload the filament, then it asks to insert, and printing continues for some time. Then it stops again and asks to pull out the filament (again) and this process just repeats itself.

I have correct settings for Colorfabb HT filament for the print (270/110°C, min cooling) and I’ve tried to refo the first layer calibration with normal PLA. With PLA everything seems to work well, and I’ve managed to print the same part with PLA with no problem (of course with PLA temperatures, but otherwise the same file), so the problem is not in the gcode.

Any idea what might cause this problem? Video link here:

Thank you.