Calibrate KLipper extruder step-distance
- Mark the filament 150mm before the entry to your extruder.
- Heat up the nozzle to your desired printing temperature.
- Home all axis to get in "printer ready" state.
- 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.
- G92 E0 (resets the "extruded material" value to 0.)
- G1 E100 F100 (extrudes 100mm filament with 100mm/min.)
- 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.
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
For underextrusion the new value is lower (0.00966) than the old one (0.0105), and for overextrusion it is the opposite ;-)