Bambu Studio Calibration Guide: Getting Perfect Prints Every Time

Bambu Lab printers are the easiest FDM machines to get started with — but like all FDM printers, they benefit from proper calibration. The good news is that Bambu Studio (and OrcaSlicer, the community-developed alternative) includes built-in calibration tools that make the process far simpler than on traditional printers. No G-code commands, no manual calculations.

This guide covers every calibration step in Bambu Studio in the order you should run them: from first layer setup to flow rate to pressure advance. Run through these once when you first set up a new filament, and your prints will be consistently excellent.

Before You Start: Load the Correct Filament Profile

Bambu Studio includes filament profiles for Eolas Prints filaments. In the Prepare tab, click the filament dropdown and search for Eolas Prints. Select your material. These profiles are pre-tuned starting points — calibration refines them further for your specific printer and environment.

If you cannot find an Eolas Prints profile, use the closest generic profile (e.g. Generic PLA for our PLA 1.75mm) and calibrate from there.

Step 1: First Layer Calibration

The first layer is the foundation of every print. If it's wrong, nothing else you calibrate will fully compensate.

Using the Live Z-Offset Adjustment

On Bambu Lab printers, Z-offset is called Nozzle Offset Z and is adjusted during the first layer of a real print or a calibration print.

1. Start a print (or the built-in first layer calibration: Calibration → First Layer Calibration in Bambu Studio).
2. Watch the first layer deposit. The filament lines should be slightly squished onto the bed — visible as slightly flattened lines that merge together. If the lines are round and separated (like a wire sitting on top of the bed), the nozzle is too high.
3. During printing, use the Live Adjust Z option on the printer screen or in the Bambu Handy app to move the nozzle closer or further from the bed in real time. Adjust in increments of 0.05mm.
4. The correct Z-offset produces lines that are ~80% of their original circular width — visibly squished but not so flat that they spread excessively.

What Good vs Bad First Layers Look Like

Step 2: Flow Rate Calibration

Flow rate (also called extrusion multiplier) controls how much filament is deposited per unit of movement. Even small deviations cause over- or under-extrusion that affects dimensional accuracy, surface quality, and part strength.

Running the Flow Rate Calibration in Bambu Studio

1. In Bambu Studio, go to Calibration → Flow Rate.
2. Select your printer and filament profile.
3. Print the calibration model. It prints a series of squares or lines at different flow rate values, labelled with the percentage offset applied.
4. Examine the results. Look for the sample that shows the smoothest surface with no gaps (under-extrusion) and no raised ridges or excess material at corners (over-extrusion).
5. Enter the winning percentage in your filament profile: Filament → Advanced → Flow ratio. If the default is 1.0 and the best sample was at +5%, set flow ratio to 1.05.

How to Read Flow Rate Results

• Surface looks rough or grainy with gaps between lines: Under-extrusion — increase flow rate
• Surface has raised ridges, excess material at corners, or is bubbly: Over-extrusion — reduce flow rate
• Smooth, uniform surface with no excess material: Correct flow rate

Typical correct flow rates for Eolas Prints filaments are within ±5% of 1.0. If your calibration produces a result outside this range, check for a partial clog before accepting the value.

Step 3: Pressure Advance Calibration

Pressure advance (called Linear Advance in Marlin firmware) compensates for the lag between the extruder motor moving and the actual change in nozzle pressure. Without it, corners tend to over-extrude as the nozzle decelerates, and the filament takes a fraction of a second to stop flowing after the move ends.

Bambu Lab printers use a proprietary implementation of pressure advance that is pre-set per material — but calibrating it for your specific filament and environment improves corner sharpness and reduces blobs significantly.

Running Pressure Advance Calibration in OrcaSlicer

OrcaSlicer (the community-developed Bambu-compatible slicer) has the most accessible pressure advance calibration interface. If you are using Bambu Studio, the equivalent is in Calibration → Pressure Advance.

1. Open OrcaSlicer (or Bambu Studio) and navigate to Calibration → Pressure Advance.
2. Print the calibration pattern. It produces a series of lines or a tower printed at varying pressure advance values.
3. Look for the line or segment with the sharpest corners and smoothest surface. Sharp, clean corners with no blobs indicate the correct value.
4. Enter the value in your filament profile: Filament → Advanced → Pressure advance.

Typical Pressure Advance Values by Material

Step 4: Temperature Calibration

Unlike traditional printers where temperature towers require manual G-code editing, Bambu Studio and OrcaSlicer automate this entirely.

1. Go to Calibration → Temperature.
2. Set the temperature range to test. For PLA: 190–220°C. For PETG: 225–245°C. For ABS: 230–250°C.
3. Print the temperature tower. Each section prints at a different temperature, labelled on the part.
4. Examine: look for the section with the best bridging, sharpest overhangs, and smoothest surface without stringing.
5. Set that temperature as the default in your filament profile.

The Eolas Prints filament profiles in Bambu Studio already include optimised temperature ranges. Temperature calibration is most useful when you're using a custom or generic profile, or when trying to push maximum speed.

Step 5: Max Volumetric Speed

Maximum volumetric speed (MVS) is the real limit of how fast your printer can extrude — more useful than print speed in mm/s, which ignores nozzle diameter and layer height.

If you push print speed beyond your MVS, the result is under-extrusion: gaps, weak layers, and poor surface quality even though the head is moving fast.

1. In OrcaSlicer, go to Calibration → Max Volumetric Speed.
2. Print the calibration model. It prints at progressively faster volumetric speeds until under-extrusion appears.
3. Find the point where quality degrades and set your filament profile's MVS to 90% of that value for reliable printing.

Typical MVS values by material (0.4mm nozzle)

Step 6: Input Shaping (Resonance Compensation)

Input shaping compensates for the mechanical resonance of the printer frame — the vibrations caused when the print head changes direction rapidly. Without it, fast prints show ghosting: wave-like artefacts on the surface adjacent to features like holes and walls.

Bambu Lab printers run input shaping calibration automatically as part of their startup routine. You do not need to run this manually unless you notice ghosting after a hardware change (e.g. replacing the carbon rods, adding a camera, or modifying the AMS).

To re-run: on the printer touchscreen, go to Settings → Calibration → Vibration Compensation and run the calibration. The printer will run a series of short test moves and update its compensation parameters automatically.

Step 7: Save Your Calibrated Profile

Once calibrated, save everything as a named filament preset so you don't need to redo it each session.

1. In Bambu Studio or OrcaSlicer, open your filament profile.
2. Set the calibrated values: temperature, flow rate, pressure advance, MVS.
3. Click Save as and name it descriptively — e.g. "Eolas PLA 1.75mm Black — Calibrated" or "Eolas PETG — P1S Calibrated".
4. This preset will appear in your filament dropdown for all future prints on this material.

Calibration Order Summary

Related guides: Temperature Tower | Flow Test | Retraction Test | Extruder Calibration

Using Eolas Prints filaments? All our filaments are available as named profiles in Bambu Studio. Search Eolas Prints in the filament selector. If you need help dialling in settings for a specific material, contact our technical support team.