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OrcaSlicer/doc/print_settings/calibration/flow-rate-calib.md
Ian Bassi 4e59b0abc6
Wiki + Readme: MD security and improvements (#9807) 
* Wiki + Readme: MD, security and improvements

Standardized MD GitHub Wiki format
Removed outdated and malicious links
Modularized calibrations
Suggested calibration order added
Minor bug fixes
Image improvements and corrections
Added winget commands
Completed previous WIPs
Added new WIPs
Removed obsolete references
Visual Changes

Co-Authored-By: Noisyfox <timemanager.rick@gmail.com>
Co-Authored-By: dewi-ny-je <2866139+dewi-ny-je@users.noreply.github.com>
Co-Authored-By: Nico Domino <7415984+ndom91@users.noreply.github.com>
Co-Authored-By: Martin Ulmschneider <7497782+mulmschneider@users.noreply.github.com>
Co-Authored-By: Rodrigo <162915171+RF47@users.noreply.github.com>

* MD Indentation + images update

---------

Co-authored-by: Noisyfox <timemanager.rick@gmail.com>
Co-authored-by: dewi-ny-je <2866139+dewi-ny-je@users.noreply.github.com>
Co-authored-by: Nico Domino <7415984+ndom91@users.noreply.github.com>
Co-authored-by: Martin Ulmschneider <7497782+mulmschneider@users.noreply.github.com>
Co-authored-by: Rodrigo <162915171+RF47@users.noreply.github.com>
2025-06-08 11:11:43 +08:00

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Flow rate

The Flow Ratio determines how much filament is extruded and plays a key role in achieving high-quality prints. A properly calibrated flow ratio ensures consistent layer adhesion and accurate dimensions. If the flow ratio is too low, under-extrusion may occur, leading to gaps, weak layers, and poor structural integrity. On the other hand, a flow ratio that is too high can cause over-extrusion, resulting in excess material, rough surfaces, and dimensional inaccuracies.

Warning

For Bambulab X1/X1C users, make sure you do not select the 'Flow calibration' option.

uncheck

Important

PASS 1 and PASS 2 follow the older flow ratio formula FlowRatio_old*(100 + modifier)/100. YOLO (Recommended) and YOLO (perfectist version) use a new system that is very simple FlowRatio_old±modifier.

flowrate

Calibrating the flow rate involves a two-step process.

  1. Select the printer, filament, and process you would like to use for the test.

  2. Select Pass 1 in the Calibration menu

  3. A new project consisting of nine blocks will be created, each with a different flow rate modifier. Slice and print the project.

  4. Examine the blocks and determine which one has the smoothest top surface. flowrate-pass1_resize 0-5

  5. Update the flow ratio in the filament settings using the following equation: FlowRatio_old*(100 + modifier)/100. If your previous flow ratio was 0.98 and you selected the block with a flow rate modifier of +5, the new value should be calculated as follows: 0.98x(100+5)/100 = 1.029.** Remember** to save the filament profile.

  6. Perform the Pass 2 calibration. This process is similar to Pass 1, but a new project with ten blocks will be generated. The flow rate modifiers for this project will range from -9 to 0.

  7. Repeat steps 4. and 5. In this case, if your previous flow ratio was 1.029 and you selected the block with a flow rate modifier of -6, the new value should be calculated as follows: 1.029x(100-6)/100 = 0.96726. Remember to save the filament profile.

pass2 -6 image

Tip

@ItsDeidara has made a html to help with the calculation. Check it out if those equations give you a headache here.