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The model of the test part is perfectly smooth and exported/sliced in very high resolution, yet there are slight waves on both axis. These waves are not visible in simulation. Converting to arcs via Arc-Welder does not change anything. No stuttering due to the high resolution of G-code (as it's a 32-bit board).

As there are no stops, and speed is uniform - I expect no ringing. What could be the cause?

Ghost4 printer, SKR-PRO board with Marlin bugfix-2.0.x.

Example print

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  • $\begingroup$ What are your printer's esteps per mm? $\endgroup$ – R.. GitHub STOP HELPING ICE Apr 3 at 0:10
  • $\begingroup$ @R..GitHubSTOPHELPINGICE X160.00 Y160.00 Z400.00 E1660.00 $\endgroup$ – BarsMonster Apr 3 at 13:42
  • $\begingroup$ Ok, 1660 is high enough that extrusion shouldn't be quantized enough to cause this. $\endgroup$ – R.. GitHub STOP HELPING ICE Apr 3 at 18:38

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