Fabtotum + Taulan nylon

[Justeelis]

Hello,

Could you please try to identify issues, why my printer is not extruding?

One of two (both were first) great prints:
Printer - Fabtotum
Filament - Taulman Nylon 618
Extrusion temp - tried various, from 200 too 230 (mostly)
Heated bed - 60 + PVZ glass coat

Here are pictures of what happens (meaning, practically nothing, except from mild fumes from hot end) when trying to print Marvin sample file



Extruder seems a bit black, but no filament seems to have came from it. Also, here is my last "partly sucesfull" print in PLA

If you need more info or pictures, please specify

Thanks a lot