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OrcaSlicer/doc/print_settings/calibration/flow-rate-calib.md
Ian Bassi 3b2fa4469a
Wiki fix images and links (#9858) 
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Co-Authored-By: StdVectorBool <4926951+StdVectorBool@users.noreply.github.com>

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Co-authored-by: StdVectorBool <4926951+StdVectorBool@users.noreply.github.com>
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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.

flow-calibration

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 flowcalibration_update_flowrate

Tip

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