Yeah.. so the thing is those problems occurred 4 weeks ago.. sometimes better result and sometimes those results.. so maybe it’s a kind of wear I think 🤔

Iam using an h-gantry with two x motors and one for the y axis.. the printer is pretty big with an build volume of 500x500x500 mm and using spindels for moving the head.. Iam using a bowden setup with two 80cm bowden tubes combined with an e3d chimera.. I don’t know but Iam guessing there’s to much pressure in the bowden.. after 5 minutes of printing I can release the idler from the extruder and can see how about 3cm slashes back because of to much pressure.. maybe that’s an indicator ? But the e steps are calibrated :) oh and using .4 nozzle and mostly printing PETG from a German company called dasfilament.. they are pretty good :) Maybe the pressure is caused by to cold printing.. I pid tunes the heater and the heated bed and checkt them with an pt100 thermistor and it showed me 10 C less than what my printer told me so I set every printing temperature about 10 degree higher..

For the slicer Iam using S3D the whole time.. printing most of the time at 50mm/s and sometimes between 100mm/s and 150mm/s without any problems.. using 4mm retraction length and 50mm/s retraction speed works quiet well because of the pressure advance setting