When should you use this tool?
Use it when a new filament, nozzle or hotend needs a repeatable calibration workflow instead of changing several settings at once.
LayerCompass Tool
Filament Calibration Assistant
Calibrate a new filament in a repeatable order instead of changing several values at once. The assistant adapts guidance to slicer, material and extruder and includes an MVS headroom check.
Build a calibration plan
Apply MVS with headroom
If a test finds the just-clean maximum volumetric speed, some margin is useful for real models.
Profile value
17.0 mm³/s
Before you calibrate
A profile cannot calibrate away a partial clog, mechanical problem or wet filament. If a previously good profile suddenly prints badly, inspect material condition, nozzle, extruder and mechanics first.
For dimensional accuracy after extrusion calibration: do not confuse proportional filament shrinkage with a constant hole/contour error.
Tool guide
Filament Calibration Assistant: when and how should you use it?
A useful result starts with the right question. These notes explain what the tool is designed for, how to interpret its output and where a calculation is intentionally only an approximation.
How to use it well
Check material condition and hardware first, then follow the guided plan and record the result of each test. Avoid running MVS permanently at the just-clean failure edge.
Limits & important notes
Calibration order differs across slicers and firmware. The assistant provides a rational workflow but does not replace slicer- or manufacturer-specific instructions.
Frequently asked questions
Why is MVS early in the OrcaSlicer workflow?
Current OrcaSlicer calibration exposes Max Volumetric Speed as an early dedicated test. Knowing the real melt-capacity limit helps interpret speed and extrusion behavior later.
Do I need to fully recalibrate every spool?
Not always. Existing values can be a good starting point for the same material family and hardware. A new brand, color, nozzle, hotend or visible quality change is a reason to re-check.
Why dry filament before calibration?
Moisture can cause stringing, bubbles, unstable flow and surface defects. Otherwise you may tune process settings around a material-condition problem.
Is 85% MVS always the right profile value?
No. It is a conservative starting margin. Material, model, temperature, nozzle and hotend determine how much headroom is appropriate.
These tools provide guidance and calculations from your inputs. Safety-critical, electrical or highly loaded parts require additional verification.
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