There is 2 parts:

• tuning your extruder steps/mm value - this mechanical part can use recommanded value
• tuning your extrusion multiplier - this is specific to each filament

see also

• Filament Calibration Masterclass – 95% do it wrong!

# Tuning your extruder steps/mm value

When the g_code require a certain amount of filament, this allow to get the right length of filament.

Instruction to calibrate this:

• setup factory parameter for extruder (eg orbiter)
• take a light color filament that can be marked
  • insert filament in extruder directly (not within bowden)
  • make sure flows go through
  • make a mark at 70mm above the extruder entry
  • extrude 50mm
  • measure what’s left above the extruder entry (it should be 20mm)
  • if there is a difference of more than 1mm - use formula to adjust parameters

Next calculate flow per filament (Tuning your extrusion multiplier section).

# How do you determine your printer’s max volumetric speed?

• Speed & Max Flow Tuning (gcode) - from teaching Tech
• Determining Maximum Volumetric Flow Rate
  • Cura :page_facing_up: has not yet added this feature - Set Max Flow in your slicer.
  • Move exceeds maximum extrusion (klipper) - safety feature of Klipper

Ender 3 Ender 6 default extruder + CHT nozzle 0.6 max is aboug 12mm³/sec which correspond to 0.6 nozzle, 04 layer height and xx mm/sec

# Tuning your extrusion multiplier

Using Orca Slicer This is also available in Cura plugin Calibration shape - multi flow test

• choose a filament profile close to the filament you are using
• print the extrusion test
• look for the relative flow setting that looks the best (on the outer surface)
• apply formula to current flow.

A very simple and fast print test for configuring a 3d printer extrusion ratio.

see also the calculator

On Cura the extrusion ratio can be found in Material.flow.

• using Materials plugins the Material flow, can be stored be material config (as well as other parameters).

# Negative Space Test

• Negative space tolerance bad: Holes are too tiny