Volumetric Flow Calibration – Max Performance Test

This volumetric flow calibration model helps you find the maximum safe flow rate for your filament and printer, ensuring reliable, high-speed 3D printing without clogs or under-extrusion.
Designed with performance, clarity, and Bambu Lab compatibility in mind, it includes 3 separate models (print profiles) for PLA, PETG, and ABS, each with predefined, optimized settings.

Model features:

• 5 filament-specific profiles (PLA, PETG (normal and slow test), ABS, TPU) with tuned settings
• Single-wall design for fast printing & minimal filament use
• Max tested speed: 495 mm/s (safe for Bambu Lab A/P/X series)
• Small beds printer-friendly (model size 170mmx170mm): Works with Bambu A1 Mini 
• Clean object naming: Speeds and flow rates are labeled by height
• Theoretical max flow: up to 45 mm³/s
• No brims or supports required
• Improved performance: No slicer slowdowns (unlike many other tests)
• for TPU, print profile optimized for slow printing (starting from 1mm3)

How to Use:

1. Choose the correct print profile (PLA, PETG, ABS, or TPU)
2. Slice and print the model
3. Monitor print; stop when quality starts degrading (gaps, stuttering)

4. Measure the height where defects begin using a ruler or caliper

5. Match that height with the named object in the slicer to find your volumetric flow value (in mm3)

6. Reduce the value by 15–20% for safety, and set it in your filament profile as a new volumetric flow value

NB: For the printers that have the option to choose Standard/High flow nozzle settings - please choose the Standard flow

Using Custom Filament Profiles?
You need to adjust 3 filament profile settings (changes in filament profile settings are needed for the test purpose only, do not need to save these changes in the filament profile):

• switch off "slowing printing down for better layer cooling" (Cooling tab)

• set 0 sec to max cooling setting (Cooling tab)

• set volumetric speed limit on 50mm3/s (Filament tab)

In order to determine max volumetric speed, you will need to use the Preview tab > Flow view in your slicer to identify the exact flow rate at a height where a defect was detected. The flow value will appear as a pop-up window after toggling the horizontal selector (see screenshots below).

Happy printing—and unlock your filament's true potential!