I have the following configuration on my CR-10: - Titan extruder with full size motor (was inside the E3D kit) - 45cm Capricorn XS PTFE Bowden tube - E3D v6 Extruder with 0.4mm hardened steel nozzle Now the problem: The print starts fine but after a while (mostly after 30-60 minutes) the titan extruder grinds the filament and I have to abort the print, unload filament, remove the grinded part and reload filament. It happens so often that I have only a very low chance in finishing a print. Further Information: - I print gold PLA@200°C - E-Steps are calibrated [this holds true for my first Capricorn PTFE. Because of changed tolerances and issues based on these new tolerances they send me an replacement.] Things I've tried: - I reduced extrusion multiplier from 1 to 0.95 and finally to 0.92 --> No effect - I changed retraction distance from 2.5mm to 2.0mm and 1.5mm --> No improvement but a lot of stringing - I changed retraction speed from 85mm/s down to 50mm/s --> No change - I adjusted the tension on the titan extruder and tested various settings between middle and maximum tension --> The more tension I apply to the filament, the deeper are the grinding marks, but no improvement on the situation Do you guys have any hints for me, how I can solve my problem?