Differences

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--- tune_extruder_rotational_distance [2025/09/14 01:48] – dshoop
+++ tune_extruder_rotational_distance [2026/01/14 00:23] (current) – dshoop
@@ Line 4: / Line 4: @@
 An accurate extruder rotational distance tuned for your specific extruder head is critical, if off so will all of [[Klipper]]s extrusion calculations. This should be done before other tuning and calibrations relating to extruding filament.
-Ellis's Tuning Guide provides a good explanation and covers the canonical process for tuning the value. See https://ellis3dp.com/Print-Tuning-Guide/articles/extruder_calibration.html
+The recommended method is known as "measure and trim". We have a current starting point from which to run our tests, the current value defined in the [extruder] stanza of printer.cfg, to use as an initial guess for the rotation distance so we don't need to obtain it from steps_per_mm or by inspecting the hardware. It's the same value you'll be changing after calibration.
+[[Klipper]] describes the the process in [[https://www.klipper3d.org/Rotation_Distance.html#calibrating-rotation_distance-on-extruders|this chapter of the documentation devoted to rotational distances]].
+ <code>
+Example rotational distance in printer.cfg, use as the starting
+point, then edit with calibrated value:
+[extruder]
+rotation_distance: 31.4
+</code>
+Example rotational distance in printer.cfg, use as the starting point, then edit with calibrated value:
+[[Klipper]] describes the the process in [[https://www.klipper3d.org/Rotation_Distance.html#calibrating-rotation_distance-on-extruders|this chapter of the documentation devoted to rotational distances]].
+Ellis's Tuning Guide provides a detailed explanation and covers the canonical process for tuning the value. See https://ellis3dp.com/Print-Tuning-Guide/articles/extruder_calibration.html
 The best video resource for demonstrating this process is 00:02:22 into this [[https://youtu.be/mCcP8dffwLk?t=142|YouTube video]] by Wild Rose Builds.