Calibrate KLipper extruder step-distance: Difference between revisions

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'''!! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! '''
'''[https://www.klipper3d.org/Rotation_Distance.html#calibrating-rotation_distance-on-extruders This is the new procedure]!'''
==== Preparation: ====
==== Preparation: ====
# Mark the filament 120mm before the entry to your extruder.
'''!! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! '''
# Mark the filament 150mm before the entry to your extruder.
# Heat up the nozzle to your desired printing temperature.
# Heat up the nozzle to your desired printing temperature.
# Home all axis to get in "printer ready" state.
# Home all axis to get in "printer ready" state.
# Move the nozzle 50mm away from the bed to make room for the filament that will be extruded in a moment.
# Move the nozzle away from the bed to make room for the filament that will be extruded in a moment.
# Execute the following G-commands one by one.
# Execute the following G-commands one by one.
#* '''G92 E0''' (resets the "extruded material" value to 0.)
#* '''G92 E0''' (resets the "extruded material" value to 0.)
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If it is 28mm instead of 20mm (120mm - 100mm) than you are UNDERextruding by 8mm ==> 92mm instead of 100mm. If it shows 15mm than your are OVERextruding by 5mm ==> 105mm.
If it is 58mm instead of 50mm (150mm - 100mm) then you are ''UNDER''extruding by 8mm.  This make E = 92 mm in the formula below.<br>
If it shows 45mm than your are OVERextruding by 5mm. This makes E = 105 mm in the formula below.


==== Now calculate: ====
==== Now calculate: ====
'''!! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! '''


c := current value in configuration.cfg<br>
E = measured length of extruded filament.<br>
m := measured left over filament<br>
d = desired/expected length of extruded filament.<br>
d := desired mm<br>
C = current step_distance.<br>
n := new value for configuration.cfg<br>
n = new valu for step_distance.<br>


  ((120 - m) / d) * c = n<br>
'''n = (E/d)*C'''
  ((120 - 28) / 100) * 0.010500 = 0,009660<br>
  (92 / 100) * 0.010500 = 0,009660


As you can see, for underextrusion the new value is lower than the old one.
  (92 / 100) * 0.0105 = 0.00966
You may play around with the last two numbers to fine tune.
  (105 / 100) * 0.0105 = 0.011025


==== Or use this App ====
Updated to the new way of configuring rotation distance.
  https://studio.code.org/projects/applab/7Mz-Jt-Gy6HG5veaWxx5j9Zz0w_6pDnEqFoxZPUYCec


==== Notes ====
For underextrusion the new value is lower (0.00966) than the old one (0.0105), and for overextrusion it is the opposite ;-)


__________________
* https://mattshub.com/blogs/blog/extruder-calibration
* https://mattshub.com/blogs/blog/extruder-calibration
* https://docs.google.com/spreadsheets/d/1AWBTYIDA7LRxIdVeTuUnIcgW5g1HijDb/edit#gid=627601536
* https://docs.google.com/spreadsheets/d/1AWBTYIDA7LRxIdVeTuUnIcgW5g1HijDb/edit#gid=627601536
* https://github.com/KevinOConnor/klipper/issues/934#issuecomment-714438327
* https://github.com/KevinOConnor/klipper/issues/934#issuecomment-714438327
[[Category:Klipper]][[Category:3D Print]][[Category:Creality]][[Category:Ender 5 Plus]][[Category:RaspBerry Pi]][[Category:OctoPrint]]

Latest revision as of 09:56, 20 October 2021

!! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !!

This is the new procedure!

Preparation:

!! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !!

  1. Mark the filament 150mm before the entry to your extruder.
  2. Heat up the nozzle to your desired printing temperature.
  3. Home all axis to get in "printer ready" state.
  4. Move the nozzle away from the bed to make room for the filament that will be extruded in a moment.
  5. Execute the following G-commands one by one.
    • G92 E0 (resets the "extruded material" value to 0.)
    • G1 E100 F100 (extrudes 100mm filament with 100mm/min.)
  6. Now measure the distance between your extruder entry and the mark on your filament.


If it is 58mm instead of 50mm (150mm - 100mm) then you are UNDERextruding by 8mm. This make E = 92 mm in the formula below.
If it shows 45mm than your are OVERextruding by 5mm. This makes E = 105 mm in the formula below.

Now calculate:

!! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !! DEPRECATED !!

E = measured length of extruded filament.
d = desired/expected length of extruded filament.
C = current step_distance.
n = new valu for step_distance.

n = (E/d)*C 

 (92 / 100) * 0.0105 = 0.00966
 (105 / 100) * 0.0105 = 0.011025

Or use this App

Updated to the new way of configuring rotation distance. 

 https://studio.code.org/projects/applab/7Mz-Jt-Gy6HG5veaWxx5j9Zz0w_6pDnEqFoxZPUYCec

Notes

For underextrusion the new value is lower (0.00966) than the old one (0.0105), and for overextrusion it is the opposite ;-)

__________________

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