Weird kind of under extrusion

[Sunrider 0]

So this problem actually seems to occur in every print, im wondering why its happening 

[Smithy 1,144]

There are tons of reasons why you get such a result, but without more information it will be hard to give good advises.

 

Some hints:

• too fast
• too cold
• feeder slipping
• TFM coupler in case you have one
• Bowden tube in case you have one
• bad filament quality
• non consistent filament diameter
• ....

 

 

[Sunrider 0]

Update : ok so i just cleaned the nozzle , refeeded de filament and ive loosen the extruder knob also. Tried printing the exact same print and its got the same extrusion problem on the exact same height. 

Any thoughts  ?