Rotation Distance Calculator for Klipper (Extruder)

Source Rotation_Distance

1. Make sure the extruder has filament in it, the hotend is heated to an appropriate temperature, and the printer is ready to extrude.


2. Use a marker to place a mark on the filament around 70mm from the intake of the extruder body.
   Then use a digital calipers to measure the actual distance of that mark as precisely as one can.
   Note this as <initial_mark_distance>.


3. Extrude 50mm of filament with the following command sequence:
   G91 followed by G1 E50 F60.
   Note 50mm as <requested_extrude_distance>. Wait for the extruder to finish the move (it will take about 50 seconds).
   It is important to use the slow extrusion rate for this test as a faster rate can cause high pressure in the extruder which will skew the results.
   (Do not use the "extrude button" on graphical front-ends for this test as they extrude at a fast rate.)


4. Use the digital calipers to measure the new distance between the extruder body and the mark on the filament.
   Note this as <subsequent_mark_distance>.
   Then calculate: actual_extrude_distance = <initial_mark_distance> - <subsequent_mark_distance>


5. Calculate rotation_distance as: rotation_distance = <previous_rotation_distance> * <actual_extrude_distance> / <requested_extrude_distance>
   Round the new rotation_distance to three decimal places.

Imprint:
Christian S
schnello.android@gmail.com