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Knocking sound from extruder stepper

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Posted (edited) · Knocking sound from extruder stepper

There is this knocking noise from extruder stepper. Please help me to figure out the problem.

SKR 1.4 Turbo + TMC2209 ( vref=0,8V ) + Marlin

Here is the list of what I did to solve this,

I removed filament so it is not about the hotend
I changed TMC driver
I changed connection port on mainboard ( used E1 port instead of E0 port )
I unplugged steppers cable and plugged to x / y and z steppers , this time sound transferred to that stepper.

As I understooed, extruder stepper is making tiny and sudden retractions during the xy direction changes of nozzle while printing. That knocking sound comes from that little retraction moments. It is not effecting print quality but very disturbing and loud.


I have made 2 videos. In the first video retraction moments can clearly be seen.






Edited by utkudemi
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